Author - NZAGRO

Header Auger Fingers & Crop Flow: 7 Signs to Check Before the 2026–27 Harvest

A header can have a sharp cutterbar and still feed crop poorly.

Once the crop has been cut, it still needs to move smoothly through the front and into the feeder system. On headers using an auger or retractable finger system, small problems with auger fingers, holders or associated hardware can turn into bunching, uneven feeding, vibration or unnecessary stoppages.

October is a useful time to inspect these components because New Zealand growers are still largely in the spring crop-development and preparation phase rather than the main harvest period. FAR’s recent updates are focused on spring sowing, irrigation, cereal management and maize development, giving operators time to correct machinery issues before the harvesting window tightens. FAR Research

This year, preparation deserves extra attention. Earth Sciences New Zealand says the strong El Niño is expected to continue through October–December 2026 and into early 2027. Seasonal climate patterns do not determine what will happen in an individual paddock, but increased weather variability can make reliable harvesting equipment even more valuable when suitable harvesting windows appear. Earth Sciences New Zealand | NIWA

Here are seven areas worth checking on the feeding side of your header before harvest.

1. Missing or Bent Auger Fingers

Start with the obvious.

Walk the width of the auger and inspect every retractable finger. A missing finger may seem minor, particularly if the rest of the machine appears to be feeding normally, but several missing or bent fingers can reduce the consistency of crop movement.

Look for fingers that are:

• Missing completely
• Bent away from their normal working position
• Cracked
• Worn noticeably thinner than neighbouring fingers
• Damaged around the mounting or pin area
• Making contact with the auger tube or surrounding components

Compare neighbouring fingers rather than looking at each one in isolation. Differences are often easier to spot when several fingers are viewed together.

NZ Agro Parts supplies steel and poly retractable finger options for selected MacDon and Case IH applications. NZ Agro Parts

2. Excessive Movement in the Finger Holders

The finger itself is only part of the system.

Retractable fingers operate through holders, guides and mounting components that keep their movement controlled. If the holder is excessively worn, the finger may move inconsistently even when the finger itself appears serviceable.

Check for unwanted sideways movement, damaged holders, loose hardware and signs that the finger is not travelling in its normal path.

If one area of the auger has noticeably more movement than the rest, investigate it rather than simply replacing the visible finger.

Repeated finger damage can sometimes be a symptom rather than the original problem.

3. Scrape Marks Inside the Auger

Fresh scrape marks deserve attention.

Contact marks can indicate that a finger is bent, a holder is worn, the finger timing or movement is incorrect, or another component has shifted.

Do not assume that metal contact is normal simply because the machine still operates.

Look for:

• Bright fresh metal where paint or coating has been removed
• Repeated marks in the same area
• Bent finger ends
• Damage around finger openings
• Loose pins or retaining hardware

If contact is occurring, determine the cause before replacing parts and returning the machine to service.

Always follow the manufacturer’s service and safety instructions when inspecting the auger system.

4. Crop Bunching in One Area of the Header

Poor crop flow is often easier to diagnose in the paddock than in the workshop.

If material is consistently bunching in one area before entering the feeder, compare the auger fingers and holders in that section with the rest of the front.

Uneven feeding can have several causes, including reel setup, crop conditions and feeder adjustments, so it should not automatically be blamed on the auger fingers.

However, damaged or missing fingers can contribute to inconsistent movement after the crop reaches the auger.

The key is to follow the crop path.

Ask:

Where does the crop first stop moving smoothly?

If the problem begins immediately after the material reaches the auger, inspect the auger finger system carefully before changing unrelated settings.

5. Repeated Finger Breakage

Replacing the same component several times should trigger a deeper inspection.

Repeated finger failures may point to:

• Incorrect fitment
• Excessive contact
• Damaged holders
• Foreign material entering the header
• Misalignment
• Loose mounting components
• A problem elsewhere in the feeding system

Do not simply keep replacing broken fingers without investigating why they are breaking.

A five-minute visual inspection after the second failure may prevent repeated stoppages later.

6. Incorrect or Mixed Replacement Fingers

Agricultural parts can look almost identical while having important dimensional differences.

Diameter, length, mounting arrangement, pin location and application can all matter.

For example, NZ Agro Parts stocks different retractable finger systems for selected MacDon applications, including steel and poly versions. One poly retractable finger listed for MacDon’s FM100 float module fits FD130, FD135, FD140 and FD145 fronts and uses a specific OEM reference. NZ Agro Parts

That does not mean every similar-looking finger is interchangeable.

Before ordering, record:

Header manufacturer → header model → adapter or front configuration → serial number → existing part number → finger length → finger diameter.

Photographs of the existing component and mounting location can also help with identification.

Ordering by appearance alone is risky.

7. Loose Pins, Fasteners or Retaining Hardware

Small hardware can stop a large machine.

When inspecting auger fingers, check the pins, retaining components and associated fasteners at the same time.

Look for:

• Bent pins
• Missing clips
• Loose bolts
• Elongated mounting holes
• Damaged threads
• Uneven wear
• Hardware that has previously worked loose

Replacing a finger but reusing damaged retaining hardware can result in the same failure returning.

If you are building a harvest spares kit, include the smaller hardware required to install the parts you are carrying.

There is little benefit in having the correct spare finger in the toolbox if the retaining pin or holder needed to fit it is missing.

Check the Whole Crop-Flow System

Auger fingers should not be inspected in isolation.

The reel, cutterbar and feeder system all work together.

A damaged reel tine can present crop poorly to the auger. A worn cutterbar can leave material attached or unevenly cut. Incorrect reel positioning can overload one part of the feeding system.

MacDon’s own maintenance guidance includes inspection of auger fingers and holders for cracks or bending as part of preventive header maintenance, alongside checks of the cutterbar, drapers, skid shoes and drive components. MacDon

That is a useful principle for any brand of header: diagnose the crop path rather than replacing whichever part is easiest to see.

Steel or Poly Auger Fingers?

Both designs can have a place depending on the machine and application.

The most important factor is correct fitment for the specific header.

NZ Agro Parts lists poly retractable fingers for selected MacDon applications and notes that the poly construction can provide protection against damage further into the combine if a finger breaks. The listed MacDon FM100 product uses a hard-wearing plastic outer material with an internal fibreglass structure. NZ Agro Parts

Operators changing from one finger type to another should confirm compatibility before installation rather than assuming the replacement is universal.

Build a Simple Auger-Finger Spares Kit

For contractors and operators covering large areas, a small model-specific spares kit can prevent a minor problem from becoming several hours of downtime.

Consider carrying the correct auger fingers, holders, pins, retaining clips and frequently used mounting hardware for the exact header being operated.

Label parts by header rather than keeping mixed components together.

This becomes especially useful when several MacDon, Case IH or New Holland fronts are being serviced from the same workshop.

Test Before the Crop Is Ready

Do not make the first full-speed test in the first harvest paddock.

Once repairs have been completed, follow the manufacturer’s procedures and carry out a controlled test.

Watch the auger finger movement, listen for scraping or knocking and stop the machine if anything appears abnormal.

Recheck recently replaced components after testing.

The goal is simple: identify small problems while there is still time to correct them.

FAR’s work with combine-harvester setup has shown that machinery optimisation can produce practical gains, including lower crop losses, increased harvest speeds, reduced diesel consumption and lower horsepower demand. FAR Research

Reliability is part of that same conversation.

Keep Crop Moving This Harvest

New Zealand’s arable sector continues to operate under pressure from input costs and subdued commodity pricing, even though MPI expects arable export revenue to improve from 2026–27. Ministry for Primary Industries

That makes avoidable downtime difficult to justify.

A damaged auger finger, worn holder or missing retaining pin may be a small part, but if it interrupts crop flow during a suitable harvesting window, its impact can be much larger than its replacement cost.

Inspect the feeding system now.

Confirm the correct fitment.

Carry the parts most likely to fail.

And make sure the header is ready before the crop is.

Need Help Identifying the Right Auger Finger?

Send NZ Agro Parts your header brand, model, adapter configuration, current part number and clear photographs of the existing finger and mounting area.

We can help identify suitable OEM-quality aftermarket auger fingers and header-front parts for selected MacDon, Case IH, New Holland and other harvesting applications.

NZ Agro Parts — The Right Parts. The Right People.

Brand names and original part numbers are used for reference and fitment identification only. NZ Agro Parts is not sponsored by, affiliated with or connected to the equipment manufacturers named.

A header can look ready for harvest and still have a cutterbar that is quietly costing you performance.

When crop starts pushing ahead of the knife, stems are left ragged, feeding becomes uneven or the cutterbar begins vibrating more than expected, it is easy to blame the entire knife assembly. In reality, poor cutting performance can come from several different wear points working together.

Two of the first components to inspect are knife guards and sickle sections.

Both are relatively small parts, but the relationship between them is fundamental to a clean cutting action. Understanding what each component does — and what its wear looks like — can help farmers, contractors and workshops identify problems before the harvesting window opens.

With the 2026–27 season approaching, that is worth doing now rather than when crop is ready and every hour matters.

What Does a Sickle Section Do?

Sickle sections, sometimes referred to simply as knife sections, form the cutting edge of the moving knife assembly.

As the knife travels back and forth through the guards, the sections shear crop material against the cutting surfaces of the guard. For that action to work efficiently, the sections need suitable cutting edges, correct alignment and secure mounting.

A worn knife section may still move freely and appear serviceable at first glance, but its cutting ability can decline well before it physically breaks.

Look closely for:

• Rounded or noticeably blunt cutting edges
• Chipped or missing teeth
• Broken points
• Bent sections
• Loose bolts or rivets
• Uneven wear across different areas of the knife

One useful clue is the quality of the cut itself. Ragged stems or crop that appears torn rather than cleanly cut can indicate that sections are no longer cutting effectively.

Do not automatically replace only the worst-looking section without inspecting the rest of the cutterbar. Uneven wear may point to another issue such as alignment, guard condition or incorrect knife clearance.

What Does a Knife Guard Do?

Knife guards support and guide the knife while providing the opposing surface needed for the shearing action.

That means a new knife section cannot perform properly if it is running through damaged, bent or badly worn guards.

Inspect knife guards for:

• Bent points or prongs
• Cracks
• Broken tips
• Excessive wear around the knife path
• Stone or impact damage
• Uneven guard height
• Poor alignment with surrounding guards

A guard that has been bent by an impact can alter the relationship between the guard and knife even when the damage looks relatively minor.

This is why replacing knife sections alone does not always solve poor cutting.

NZ Agro Parts carries knife guards and cutterbar components for selected MacDon, Case IH, New Holland and other harvesting platforms.

So Which One Is Causing the Poor Cut?

The most reliable approach is to inspect the cutting system as a system, rather than assuming one component is responsible.

If crop is leaving a consistently ragged cut across the full width, begin by inspecting section sharpness and general cutterbar condition.

If the problem is concentrated in one part of the front, look closely at the guards and sections in that specific area. Compare them with components beside them.

If you see crop pushing rather than entering the cutterbar cleanly, inspect section condition, guard alignment and knife-to-guard clearance.

If the knife appears to lift excessively or move away from the cutting surface, the problem may involve hold-down clips rather than the sections themselves.

And if there is unusual vibration, knocking or binding, stop and investigate before continuing to operate. Bent guards, damaged sections, incorrect alignment or wear elsewhere in the knife drive can all contribute.

Always follow the machine manufacturer's inspection, adjustment and safety procedures before operating or working around a cutterbar.

Do Not Forget the Hold-Down Clips

Hold-down clips are easy to overlook because they are not normally the first component people think about when discussing cutting performance.

Their job is important: they help maintain the correct relationship between the moving knife and the guards.

Too much knife movement can reduce the quality of the cutting action and may contribute to vibration or accelerated wear.

Check hold-downs for visible wear, bending, loose mounting hardware and excessive knife clearance. If adjustment is required, use the specifications for the exact cutting system rather than relying on a general rule.

A cutterbar with good sections and good guards can still perform poorly when the knife is not being held correctly.

New Parts Still Need Correct Fitment

One of the most common traps with harvesting parts is assuming that two components that look similar are interchangeable.

They may not be.

Header model, serial-number range, cutterbar configuration, knife drive and previous modifications can all influence the correct part.

This is particularly important on platforms such as MacDon D Series and FD Series headers, where operators may encounter different cutterbar configurations across machines and generations.

MacDon itself lists preventive maintenance and high-wear replacement parts as part of its parts support for FlexDraper and draper-header platforms, reinforcing the importance of checking wear components before peak operation.

Before ordering, record:

Header brand → model → serial number → front width → current part number → clear photograph of the existing component.

That information makes identification considerably easier and reduces the risk of ordering by appearance alone.

Why This Matters More Than Ever This Season

Harvest reliability is not simply a workshop issue.

Earth Sciences New Zealand expects the current El Niño to have a strong influence into 2027. Historically, El Niño spring patterns can increase westerly-quarter winds and produce drier conditions in some eastern and northern regions, although actual conditions will vary by location and season.

Weather uncertainty makes suitable harvesting windows valuable.

At the same time, MPI reports continued commercial pressure in the arable sector from subdued pricing and global oversupply, despite forecasting an export-revenue recovery from 2026–27.

In that environment, preventable downtime becomes harder to justify.

A worn guard, damaged section or incorrectly supported knife may be inexpensive compared with the cost of stopping during a suitable harvesting window.

Build a Small Cutterbar Spares Kit Before Harvest

You do not need to carry an entire parts department in the service vehicle.

A useful cutterbar kit should focus on the wear items most likely to interrupt harvesting on the exact machine being operated.

Depending on the header and cutting system, that may include spare knife sections, common guards, section hardware, hold-down components and frequently used fasteners.

Contractors running several fronts should consider keeping the kits machine-specific and clearly labelled.

The goal is simple: when a predictable wear component fails, you already know what fits.

Start With the Cut

Good harvesting performance begins at the front of the machine.

Before the first serious harvest day, inspect the entire cutterbar slowly. Compare wear from one end to the other. Check sections, guards, hold-downs and knife movement rather than focusing only on whichever component looks easiest to replace.

If you are unsure which part fits, send NZ Agro Parts your machine brand, model, serial number, existing part number and clear photographs.

We can help identify suitable OEM-quality aftermarket harvesting parts for selected MacDon, Case IH, New Holland, John Deere and other applications.

Check early. Replace worn parts before they become breakdowns. Keep the crop moving.

NZ Agro Parts — The Right Parts. The Right People.

Brand names and original part numbers are used for fitment and reference purposes only. NZ Agro Parts is not sponsored by, affiliated with or connected to the equipment manufacturers named.

https://nzagroparts.co.nz/contact-us/

https://nzagroparts.co.nz/find-my-parts-or-parts-enquiry/

Harvest may still feel some distance away, but August is when good preparation begins.

Earth Sciences New Zealand confirmed in July 2026 that El Niño conditions had developed in the tropical Pacific. As the season progresses, New Zealand may experience more westerly airflow, unusually windy periods and greater temperature variability. El Niño is expected to strengthen further, with potentially significant effects later in 2026 and during the 2026–27 summer.

No seasonal outlook can predict conditions in an individual paddock. However, the possibility of a windier and more variable growing season gives farmers and harvesting contractors a good reason to prepare for uneven, tangled or lodged crops.

A header front that performs well in standing crop may require more attention when the crop is leaning, lying close to the ground or feeding unevenly. Inspecting the cutterbar, reel, crop lifters and feeding components now can reduce the risk of rushed repairs when the harvesting window opens.

Here are the main areas to check before the 2026–27 harvest.

Do not inspect only the most visible centre section. Pay particular attention to the ends, drive-head area and any location showing noticeably different wear.

When replacing components, confirm compatibility against the header model, serial-number range and existing cutting system. Similar-looking guards and sections are not automatically interchangeable.

NZ Agro Parts carries knife guards, knife sections, cutterbar assemblies, knife drive heads and hold-down components for selected harvesting platforms.

1. Begin with the Cutterbar

The cutterbar needs to produce a clean cut before the reel and draper system can move the crop effectively.

Lodged or tangled crop can place additional pressure on the cutting system because material may approach the knife at inconsistent angles. Blunt sections or damaged guards can increase pushing, bunching and uneven cutting.

Inspect the entire cutterbar for:

• Blunt, chipped or broken knife sections.
• Bent, cracked or badly worn knife guards.
• Excessive clearance between the knife and guards.
• Loose section bolts or rivets.
• Worn wear plates and guides.
• Damaged or poorly adjusted hold-down clips.
• Free movement and correct alignment of the knife assembly.

Do not inspect only the most visible centre section. Pay particular attention to the ends, drive-head area and any location showing noticeably different wear.

When replacing components, confirm compatibility against the header model, serial-number range and existing cutting system. Similar-looking guards and sections are not automatically interchangeable.

NZ Agro Parts carries knife guards, knife sections, cutterbar assemblies, knife drive heads and hold-down components for selected harvesting platforms

https://nzagroparts.co.nz/product-category/knife-cutter-bar

2. Inspect the Reel Before Adjusting It

The reel helps present the crop to the cutterbar and move cut material towards the feeding system. In lodged or uneven crops, its condition and adjustment become especially important.

Before changing reel height, fore-and-aft position or speed, inspect the mechanical components:

• Missing, cracked or permanently bent reel tines.
• Loose tine mounting hardware.
• Damaged bats or supports.
• Worn bushes and bearings.
• Movement in reel arms and pivots.
• Hydraulic leaks or damaged hoses.
• Inconsistent tine spacing.
• Signs that the reel has contacted the cutterbar.

A reel with several damaged tines may feed crop unevenly even when its settings appear correct.

Avoid automatically using the most aggressive reel setting. Excessive reel speed or poor positioning can increase shattering, wrap material around the reel or push crop ahead of the knife. Begin with the machine manufacturer’s recommendations and make small adjustments for crop conditions.

https://nzagroparts.co.nz/product-category/reel-parts

3. Decide Whether Crop Lifters Are Needed

Crop lifters are designed to help raise low or lodged crop so the cutterbar can collect it more effectively. They can be valuable in difficult conditions, but they should be treated as a crop-specific tool rather than a permanent solution for every paddock.

Before harvest:

1. Inspect existing lifters for bending, cracking and worn contact areas.
2. Check that mounting points and hardware are secure.
3. Confirm that the lifters are suitable for the cutting system.
4. Review the manufacturer’s installation and spacing guidance.
5. Carry spare lifters and mounting hardware where practical.

The correct arrangement depends on the crop, lodging direction, ground conditions and header design. Incorrect spacing or damaged lifters can create inconsistent feeding or increase the risk of ground contact.

When working in badly lodged crop, operators may also need to reconsider travel direction and approach the crop from the most effective angle. Make changes cautiously and follow the header manufacturer’s operating instructions.

https://nzagroparts.co.nz/product-category/crop-lifters

4. Check Auger and Retractable Fingers

On fronts using an auger or retractable finger system, damaged fingers can interrupt crop movement after the cutterbar has done its job.

Look for:

• Missing or bent fingers.
• Cracked poly fingers.
• Worn finger holders.
• Loose mounting hardware.
• Irregular finger movement.
• Contact marks inside the auger.
• Damage caused by foreign material.

A single missing finger may appear minor in the workshop, but several damaged fingers across the feeding area can create bunching and uneven delivery.

NZ Agro Parts lists steel retractable fingers, poly retractable fingers and finger holders for selected MacDon, Case IH and New Holland applications.

https://nzagroparts.co.nz/product-category/auger-finger-parts

5. Protect the Front When Cutting Low

Lodged crop often requires the operator to work closer to the ground. That increases the importance of skid shoes, wear surfaces and front protection.

Inspect:

• Poly skid shoes for thin or worn sections.
• Loose or missing skid hardware.
• Uneven wear that may indicate poor adjustment.
• Bent mounting brackets.
• Damage from stones or previous ground contact.
• Rock-protection components where fitted.

Replacing an inexpensive wear component before harvest may protect a much more costly part of the header later.

Ground conditions can vary substantially across a paddock. A setup that works in one area may require adjustment when moving into softer soil, wheel tracks or uneven ground.

https://nzagroparts.co.nz/product-category/poly-skid-shoes

6. Build a Model-Specific Harvest Spares Kit

A useful spares kit is not simply a box of assorted parts. It should be based on the exact fronts being operated.

For each header, record:

• Manufacturer and model.
• Front width.
• Serial number.
• Cutterbar system.
• Knife section and guard references.
• Reel tine type.
• Auger finger type.
• Hold-down configuration.
• Crop lifter type.
• Frequently used bolts and fasteners.

A practical kit may include:

• Knife sections.
• Common knife guards.
• Hold-down clips.
• Reel tines and mounting hardware.
• Retractable fingers and holders.
• Crop lifter hardware.
• Cutterbar bolts and nuts.
• Selected bearings or bushes.
• Skid-shoe hardware.

The purpose is not to carry every possible component. It is to cover the smaller, predictable failures that can otherwise stop harvesting while a replacement is located.

https://nzagroparts.co.nz/product/rock-dam-pro-to-protect-headers/

7. Complete a Controlled Pre-Season Test

After completing repairs, do not wait until the first harvest paddock to test the front.

Before operating, check that all guards are fitted, personnel are clear and manufacturer safety procedures have been followed.

Then:

• Move the knife by hand only where the manufacturer permits.
• Check for tight or binding points.
• Confirm that hardware is secure.
• Run the front initially at low speed.
• Listen for knocking, scraping or irregular vibration.
• Observe reel and finger movement.
• Check hydraulic connections for leaks.
• Stop and recheck recently replaced components.
• Verify adjustments and fastener torque using the correct manual.

A controlled test provides time to correct small problems without crop pressure, transport delays or customers waiting.

Preparation Protects More Than the Machine

New Zealand’s arable sector continues to face pressure from restrained commodity returns and rising operating costs. MPI expects arable export revenue to recover gradually from 2026–27, but global oversupply and subdued pricing remain important commercial challenges.

In that environment, reliability matters. Avoiding one preventable breakdown, reducing crop left behind or completing a paddock within a suitable weather window can be worth considerably more than the cost of replacing worn parts beforehand.

The goal is not to predict exactly what El Niño will deliver. It is to make sure the header front is prepared for a wider range of crop and weather conditions.

Need help identifying a part?

Send NZ Agro Parts your header brand, model, serial number, existing part number and clear photographs of the part and mounting area.

We can help identify suitable OEM-quality aftermarket harvesting parts for selected MacDon, Case IH, New Holland, John Deere and other applications.

Prepare early. Carry the right spares. Keep the crop moving.

https://nzagroparts.co.nz/find-my-parts-or-parts-enquiry/

Brand names and original part numbers are used for reference and fitment identification. Always verify compatibility and follow the machinery manufacturer’s safety, installation and operating instructions.

When harvest arrives, every hour matters. A worn knife section, weak reel tine, damaged guard or loose hold-down clip may seem small in the workshop, but in the paddock it can quickly become lost time, uneven cutting, poor crop flow and unnecessary stress.

That is why winter is one of the most valuable times of the year for farmers, harvesting contractors and agricultural workshops. It gives you the opportunity to inspect, repair and prepare your header front before the pressure of harvest begins.

At NZ Agro Parts, we supply premium OEM-quality aftermarket harvesting parts designed to help New Zealand operators keep their machinery performing when it matters most. Whether you are running MacDon, John Deere, Case IH, New Holland, CLAAS, AGCO, Lexion or other harvesting platforms, the goal is the same: reduce downtime, protect performance and keep the crop moving.

New Zealand arable crops are commonly harvested using combine harvesters, also known as headers, and the timing of harvest depends heavily on crop and grain moisture conditions. Once that harvest window opens, operators do not want to be waiting on small wear parts that could have been checked months earlier.

Why Winter Maintenance Matters

Harvesting equipment works in some of the most demanding conditions on the farm. Dust, vibration, crop load, wet patches, lodged crop, stones and long operating hours all place pressure on the front.

A header front that is not properly maintained can lead to:

Poor cutting performance
Crop bunching or uneven feeding
Increased grain loss
Higher fuel use
Premature wear on surrounding components
Costly downtime during peak harvest

FAR has also highlighted that when conditions are less than ideal, correct combine setup can help reduce losses and prevent unnecessary breakdowns. That makes pre-season inspection more than just a workshop habit. It becomes part of protecting yield and profitability.

1. Inspect Knife Sections

Knife sections are one of the first areas to check. Worn or damaged sections can leave ragged cuts, increase drag and reduce feeding efficiency.

Look for:

Rounded or blunt cutting edges
Broken tips
Bent sections
Loose bolts or rivets
Uneven wear across the cutterbar

If sections are blunt or damaged, replacement before harvest is usually a smarter decision than waiting for them to fail in the paddock.

NZ Agro Parts supplies OEM-quality knife sections and cutterbar components designed for strong cutting performance across major header brands and platforms.

2. Check Knife Guards

Knife guards play a critical role in supporting the cutting action. Damaged or worn guards can affect crop flow and place extra strain on the knife.

Inspect for:

Bent points
Cracks
Excessive wear
Broken prongs
Stone damage
Poor knife alignment

A good knife section still needs a good guard to perform properly. Replacing worn guards before harvest helps maintain a cleaner cut and smoother operation.

NZ Agro Parts stocks a range of knife guards, including options to suit MacDon, Case IH, New Holland and other fronts

3. Review Hold-Down Clips

Hold-down clips are small but important. If the knife is not held correctly against the guards, cutting performance can suffer.

During inspection, check:

Clip tension
Wear marks
Missing hardware
Bent clips
Excessive knife movement

A worn hold-down clip may not look serious, but it can reduce cutting efficiency and contribute to vibration through the cutterbar. Replacing them as part of a winter service is a simple way to improve reliability.

4. Inspect Reel Tines and Fingers

The reel is responsible for presenting crop evenly into the cutterbar and feeding system. Worn, broken or weak reel tines can cause uneven feeding, missed crop and poor performance in challenging conditions.

Check each tine for:

Cracks
Missing fingers
Loss of flexibility
Bent mounting points
Uneven spacing
Damage from previous harvest conditions

For MacDon, Case IH and New Holland draper fronts, reel tine condition is especially important when working through heavy or uneven crop. NZ Agro Parts supplies heavy-duty flexible reel tine fingers and related reel parts to help keep crop feeding smoothly.

5. Check Auger Fingers and Holders

Auger fingers and finger holders help move crop efficiently through the front. If they are worn or damaged, feeding can become inconsistent.

Inspect for:

Missing fingers
Bent or broken fingers
Worn holders
Loose mounting points
Uneven crop movement

NZ Agro Parts carries poly retractable fingers, steel retractable fingers and finger holders for selected MacDon, Case IH and related platforms, making this another high-value product area to promote from this article.

6. Inspect Crop Lifters

Crop lifters become especially valuable when dealing with lodged, low or weather-affected crops. MPI has noted that parts of New Zealand may face increased wet harvest periods, particularly Southland and North Otago/South Canterbury, where machinery may need to handle flattened or difficult crops.

Before harvest, check crop lifters for:

Wear at the contact points
Bent arms
Loose hardware
Cracks
Missing components

If your operation regularly handles lodged crop, crop lifters should be part of the pre-season conversation.

7. Check Poly Skid Shoes and Wear Areas

Skid shoes and wear surfaces protect the header front when operating close to the ground. Over time, they wear down and reduce protection.

Inspect:

Poly skid shoes
Wear plates
Mounting bolts
Cracked or thin areas
Uneven wear patterns

Replacing worn skid shoes before harvest helps protect more expensive components and reduces the risk of avoidable damage.

8. Build a Pre-Season Parts Kit

One of the smartest moves a contractor or grower can make is building a small pre-season parts kit.

Consider keeping:

Knife sections
Knife guards
Hold-down clips
Reel tine fingers
Auger fingers
Common bolts and fasteners
Crop lifter spares
Skid shoe replacements

This is especially important for contractors covering multiple farms, where downtime does not just affect one paddock — it affects the whole schedule.

OEM-Quality Aftermarket Parts: Premium Performance, Better Value

At NZ Agro Parts, our focus is OEM-quality aftermarket parts. That means products are selected for fit, strength and reliability, while giving farmers, contractors and workshops a cost-effective alternative to genuine-only supply.

For many operators, the right aftermarket part can provide the balance they need: dependable field performance, competitive pricing and fast New Zealand supply.

NZ Agro Parts is New Zealand owned and operated, offers OEM manufactured products, and promotes free delivery in New Zealand for orders above $500.

Get Harvest Ready with NZ Agro Parts

Winter is the time to walk around the header front, inspect every wear point and order the parts you need before the season pressure begins.

Whether you are preparing a MacDon draper, John Deere header, Case IH front, New Holland platform, CLAAS combine front or another harvesting setup, NZ Agro Parts can help you source the right OEM-quality replacement parts.

Do not wait until harvest to find the weak point.

Prepare now. Reduce downtime later.

NZ Agro Parts — The Right Parts. The Right People.

Brand names and original part numbers are used for reference and fitment identification only. NZ Agro Parts is not sponsored, affiliated or connected with the equipment manufacturers named.