When does the 10 percent c-frame pivot pin reduction rule apply?

AS 4024.2601 and the OEM dozer service manual require a c-frame pivot pin to be retired when its measured diameter has reduced by 10 percent or more from the original specification. The measurement is taken with a dial indicator or micrometer at the loaded contact zone of the pin, including the c-frame pivot, the push beam pin and any tilt brace pin position. Worn bushings often drive accelerated pin reduction so the bushing is measured at the same time and replaced as a matched set. Even local reduction at one location is enough to retire the pin and trigger a blade rebuild.

How worn can dozer cutting edges be before they must be replaced?

Dozer cutting edges are retired and replaced once they reach 75 percent wear against the new edge dimension, measured at the thinnest point along the blade. End bits, which sit at the outer corners of the blade and wear faster, are usually retired earlier at 50 to 60 percent wear because their loss exposes the moldboard structure to direct ground contact. Running edges past the discard threshold damages the moldboard, increases dozer cycle time and reduces material movement productivity. The Safe Work Australia 2018 Code of Practice on plant references manufacturer wear limits as the authoritative source, and OEM edge catalogues print the wear threshold on the part page.

How often should a dozer blade be inspected?

A visual pre-start check by the operator at every shift, a weekly visual inspection by a trained technician, a monthly competent-person inspection with cutting edge wear measurement, c-frame pivot pin measurement and cylinder rod condition check, and a 6-monthly major inspection with MPI on moldboard, brace arms and push beam welds. Any impact event, dropped blade, hydraulic dump or ripper strike triggers an out-of-cycle inspection before the blade returns to service. Blades on heavy production duty in mining or quarry pushing often pull the major inspection forward to a 3-monthly cadence. The interval is set against the blade ID so blade swaps reset the schedule.

Can a worn dozer blade be rebuilt or does it always have to be replaced?

A worn blade can usually be rebuilt where the moldboard remains within criteria. Cutting edge replacement, end bit replacement, push beam pin renewal, brace arm straightening and weld repair, c-frame pivot pin and bushing renewal, lift and tilt cylinder rebuild are all routine workshop scope at a qualified shop. The blade is retired and scrapped where moldboard cracks have propagated through the structural welds, where rear ribs have worn through, or where multiple rebuild cycles have left wall thickness below the OEM minimum. The OEM blade service manual is the source of truth on rebuild versus replace and the dozer hire fleet residual value depends on a stamped rebuild history.

Is this dozer blade inspection checklist free to download?

Yes. This dozer blade inspection checklist is completely free to download and use - open the HTML file in any browser and use Print then Save as PDF. No MapTrack account is required. It suits competent persons inspecting S, A, U, SU and PAT dozer blades against AS 4024.2601 across the dozer fleet. If you later want to move off paper and spreadsheets, MapTrack turns this into a live digital inspection: cutting edge and c-frame pin wear recorded against each blade ID, cylinder rod and MPI findings captured with photos, the inspection schedule tied to the blade so a swap or rebuild resets the cadence, and automated reminders with a complete timestamped audit trail. Start free at maptrack.com/free-trial or book a demo.

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Free dozer blade inspection checklist covering cutting edges, end bits, c-frame pins, cylinders and welds per AS 4024.2601 and ASME B30.20.

Jarrod Milford

Commercial Director

Updated 25 May 2026

Also see:Compliance and inspections →Best inspection software →MapTrack vs SafetyCulture →

Updated 25 May 2026

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What is a dozer blade inspection checklist?

A dozer blade inspection checklist is the attachment-level structural and wear assessment used by a competent person to decide whether a crawler dozer blade stays in service, goes on a watch list, or is retired and replaced. It applies to every blade configuration on the global crawler dozer fleet including straight (S) blade, angle (A) blade, universal (U) blade, semi-universal (SU) blade and power-angle-tilt (PAT) six-way blade across CAT, Komatsu, John Deere and Liebherr dozers from 6 tonne mini-dozers up to 100 tonne mining class machines. Unlike a dozer pre-start that runs across the whole carrier, or a 250 hour service that focuses on lubricants and filters, this checklist concentrates on the blade and its push frame structure. The scope covers blade type identification, cutting edge wear measurement and bolt torque, end bit wear and replacement timing, blade moldboard cracking around the brace mounting points, c-frame pivot pin and bushing condition, lift cylinder and tilt cylinder rod condition, brace arm straightness and weld integrity, push beam pin condition, hydraulic hose chafing across the blade-to-carrier interface, magnetic particle inspection (MPI) on suspect welds and ripper attachment condition where the dozer carries one.

AS 4024.2601 (Safety of earth-moving and road-construction machinery) sets the Australian floor for earth-moving attachments in service, ISO 6165 (Earth-moving terminology) gives the OEM documentation baseline, and ASME B30.20 (Below-the-hook lifting devices) applies where the blade is used as a lifting point through certified lugs. The WHS Regulations 2011 Chapter 5 make blade and push-frame condition part of the PCBU plant maintenance duty, and the Safe Work Australia 2018 Code of Practice on managing the risks of plant in the workplace is the practical guide most supervisors use to scope this inspection cadence. Where cutting edge wear is past 75 percent or c-frame pivot pin diameter has reduced by 10 percent or more, the inspector either retires the blade for rebuild on the spot or sets a shorter inspection interval until rebuild. A digital record in MapTrack ties each inspection to the blade serial, the carrier dozer, the install date and the operating hours so retirement and rebuild decisions remain defensible at trade-in and audit.

Learn more about compliance and inspections in MapTrack.

Benefits of using this dozer blade inspection checklist

Attachment-level accountability: Each blade decision is signed against the competent inspector who measured cutting edges and pins, not lost inside a generic dozer signature
AS 4024.2601 alignment: The checklist captures the exact wear and discard criteria from the Australian standard so SafeWork audits and OEM warranty claims are straightforward
Per-attachment traceability: S, A, U, SU and PAT blades are inspected individually with their own ID, install date and operating hour count against the carrier
Cutting edge and end bit visibility: The cutting edge wear and end bit wear thresholds are captured in measurement, so the replacement decision is data-driven rather than visual guess
Cylinder rod protection: Lift and tilt cylinder rod condition is signed off, intercepting rod scoring, seal failure and the resulting hydraulic dump that drops a blade unexpectedly
Weld defect interception: Documented MPI checks on moldboard, brace arms and push beam intercept fatigue cracks before they propagate into structural failure under load
Lifecycle records: Every blade rebuild, cutting edge replacement, inspection and discard sits against the attachment for the full life of the asset

Benefits of digitising forms in MapTrack

When you digitise dozer blade inspection checklists in MapTrack, you get:

Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
Automatically get alerts when faults are identified.
Link every form digitally as a PDF to the relevant asset, location or person.
Receive a digital PDF copy with every submission to your email.
Ability to share forms digitally.
Build conditional logic (show or hide questions based on answers).
Take pictures or attach photos. Not possible with a paper-based form.
Electronic signatures.
Edit forms later without reprinting.
Restrict permissions (who can view, complete or approve).
Build forms with AI (describe what you need and MapTrack suggests the form).
Escalate critical hazards instantly to safety managers via push notification.
Maintain an auditable safety register that satisfies WHS regulator requests.
Correlate incident trends across sites with built-in safety analytics.

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What to include in a dozer blade inspection checklist

This dozer blade inspection checklist covers 12 key areas:

Blade identification: type (S/A/U/SU/PAT), capacity, OEM or aftermarket build, serial number, carrier dozer ID and operating hours since install or last rebuild
Blade type-specific configuration: PAT blade pitch and tilt cylinder range, A-blade angle range, U and SU blade wing condition, S-blade end plate condition, configuration confirmed against the OEM spec
Cutting edge wear measurement: cutting edge thickness measured at three points across the blade, against the new edge dimension, percentage wear calculated and bolt torque verified
End bit wear measurement: end bit thickness and remaining material measured at the outer corner of the blade where wear accelerates, retainer bolt torque and adjacent moldboard condition verified
Blade moldboard cracking inspection: visual and MPI inspection of the moldboard for fatigue cracks around the brace mounting points, c-frame mounting, lift bracket and rear ribs
C-frame pivot pin and bushing condition: dial-indicator measurement on the c-frame pivot pin and bushing against the OEM clearance specification, with 10 percent diameter reduction discard rule applied
Lift cylinder rod condition: lift cylinder rod scoring inspection, chrome coverage check, seal condition at the gland and rod alignment from full retract to full extend
Tilt cylinder rod condition: tilt cylinder rod scoring inspection, chrome coverage check, seal condition at the gland, rod alignment and pitch range verification on PAT blades
Brace arm straightness and welds: brace arm visual inspection for straightness, weld inspection at brace-to-frame and brace-to-blade attachment points, MPI on any suspect weld indication
Push beam and pin condition: push beam visual inspection for cracking and twist, push beam pin and bushing wear measurement against the OEM specification
Hydraulic hose chafing inspection: deliberate walk of all hydraulic hoses from carrier to blade through the lift, tilt and angle circuits, marking any chafing or abrasion against frame edges
Ripper attachment if equipped: ripper shank visual inspection for cracking, ripper tip wear measurement, ripper hydraulic cylinder rod condition, ripper pin and bushing condition

How to use this dozer blade inspection checklist

1. Plan the inspection and isolate the carrier: pull the blade history file including ID, install date, operating hours and previous wear measurements, position the dozer on level ground with the blade flat on the deck and ripper retracted, lock out the ignition and key in pocket, allow the blade to cool
2. Identify the blade and verify configuration: confirm blade type (S, A, U, SU, PAT), capacity, OEM or aftermarket build, serial number and carrier dozer ID, verify configuration against the OEM specification including PAT pitch and tilt range or A-blade angle range
3. Measure cutting edges and end bits: measure cutting edge thickness at three points across the blade against the new edge dimension, calculate percentage wear, verify retainer bolt torque, measure end bit thickness and remaining material at the outer corner of the blade and verify adjacent moldboard condition
4. Inspect blade moldboard and ribs: complete the visual inspection of the moldboard for fatigue cracks around brace mounting points, c-frame mounting, lift bracket and rear ribs, photograph any suspect indication for follow-up MPI
5. Measure c-frame pivot pin and push beam pin condition: with the blade on the deck and unloaded, attach the dial indicator to the c-frame pivot pin and push beam pin positions, lever the linkage against the indicator and record the measured clearance against the OEM specification
6. Inspect lift cylinder and tilt cylinder rod condition: extend each cylinder through full stroke and inspect the rod for scoring, chrome coverage loss and seal leakage at the gland, verify rod alignment from full retract to full extend, repeat for tilt cylinders and confirm pitch range on PAT blades
7. Walk brace arms, push beams and hose runs: brace arm visual inspection for straightness, weld inspection at brace-to-frame and brace-to-blade attachment points, push beam visual inspection for cracking and twist, deliberate walk of all hydraulic hoses for chafing against frame edges
8. Complete MPI on suspect welds and inspect ripper: magnetic particle inspection on any suspect weld indication on moldboard, brace arms and push beam, ripper shank visual for cracking, ripper tip wear measurement, ripper cylinder rod condition and ripper pin and bushing condition where the dozer is fitted with a ripper
9. Make the end-of-life decision and record: mark the blade as fit for service, watch list (with a shorter inspection interval), partial rebuild (cutting edge and end bits) or full retirement and replacement, photograph any discard-criteria finding, sign the record and attach to the asset in MapTrack

In MapTrack, you can digitise safety inspections and compliance forms. Each submission is stored as a timestamped PDF against the asset record.

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How often should you complete this inspection checklist?

AS 4024.2601 and the Safe Work Australia Code of Practice on plant set the inspection cadence the blade inspector should follow. The operator runs a visual pre-start blade check each shift, looking for missing edge bolts, end bit loss, cracked welds and obvious hose damage at the visible blade-to-frame interface. A weekly visual inspection by a trained technician covers more of the moldboard and the cylinder rods under controlled conditions. A monthly competent-person inspection covers cutting edge and end bit wear measurement, c-frame pivot pin and push beam pin measurement, lift and tilt cylinder rod condition and the structural weld visual. A 6-monthly major inspection sits inside the carrier dozer monthly cadence and goes deeper, including MPI on moldboard, brace arms and push beam welds where the blade is on heavy production duty in mining or quarry pushing. Any impact event, dropped blade, hydraulic dump, ripper strike or near-miss triggers an out-of-cycle inspection before the blade returns to service. In MapTrack the blade inspection schedule sits against the blade ID rather than the carrier dozer, so a blade swap or rebuild resets the cadence automatically.

Frequently asked questions

Applicable regulatory standards

This template aligns with the following regulations and standards:

AS 4024.2601 (Earth-moving and road-construction machinery safety)
ASME B30.20 (Below-the-hook lifting devices)
ISO 6165 (Earth-moving machinery - Basic types - Identification and terms)
WHS Regulations 2011 Chapter 5 (Plant)
Safe Work Australia CoP 2018 (Managing the risks of plant in the workplace)

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