Free excavator undercarriage inspection checklist

What is a excavator undercarriage inspection checklist?

An excavator undercarriage inspection checklist is the structured wear and condition assessment used by a competent person to decide where each undercarriage component sits on the OEM wear curve and whether the track group stays in service, gets turned, or is retired and replaced. It applies to crawler excavators from 5 tonne mini-excavators up to 600 tonne mining hydraulic shovels and covers the full track group including track chain, track shoes, track bushings, sprockets, idlers, carrier rollers, track rollers, recoil spring and grouser bars. Unlike an excavator pre-start that runs across the whole carrier, or a 250 hour service that focuses on lubricants and filters, this checklist concentrates on the eight measurement points that drive the undercarriage cost-per-hour calculation. The scope covers track shoe height measurement against the OEM minimum, track chain pitch elongation, link height wear, bushing turn life (first turn at 50 percent and full retirement at 100 percent), sprocket tooth wear profile, idler tread wear, carrier roller and track roller wear (with the top and bottom roller positions trended separately), grouser bar height, master link condition and recoil spring condition.

Undercarriage typically represents 50 percent of total excavator maintenance cost, which is why every OEM (CAT, Komatsu, Hitachi, Volvo, Kobelco, Liebherr) publishes its own undercarriage measurement standard sitting on top of the AS 4024.2601 (Safety of earth-moving and road-construction machinery) and ISO 6165 (Earth-moving terminology) floor. The WHS Regulations 2011 Chapter 5 make track group condition part of the PCBU plant maintenance duty, because a track derailment or sudden bushing failure on a slope is a Category 1 safety incident. The full undercarriage measurement report is the document that drives the rebuild decision, the budget approval and the hire-fleet residual value calculation, and the record needs to be defensible at trade-in, finance audit and SafeWork inspection. A digital record in MapTrack ties each measurement to the carrier serial, the undercarriage serial, the install date and the running hour count so cost-per-hour trends and rebuild forecasting stay accurate across a fleet.

Learn more about compliance and inspections in MapTrack.

Benefits of digitising forms in MapTrack

When you digitise excavator undercarriage 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.

Book a demo to see how MapTrack handles excavator undercarriage inspection checklists.

What to include in a excavator undercarriage inspection checklist

This excavator undercarriage inspection checklist covers 12 key areas:

• Carrier and undercarriage identification: excavator make, model, serial number, undercarriage serial, install date and operating hours since install or last rebuild
• Track shoe height measurement: at multiple points along each side, recorded against the OEM new height and minimum discard height, percentage wear calculated
• Track chain pitch elongation: measurement across a fixed number of links (typically 4 or 8) and compared against the new chain pitch, percentage elongation calculated
• Link height wear: measurement on the chain link rail surface against the OEM minimum, percentage wear calculated for both sides of the machine
• Bushing turn life: outer bushing diameter measurement, percentage wear calculated, 50 percent first-turn threshold and 100 percent retirement threshold applied to drive the turn versus replace decision
• Sprocket tooth wear: tooth profile inspection on both drive sprockets, sprocket pocket wear, sprocket bolt torque check and matched-pair planning against chain wear
• Idler wear: front and rear idler tread wear measurement, idler flange condition, idler bearing seal condition and idler alignment to the chain
• Carrier roller wear: each carrier roller tread wear measurement and bearing seal condition, recorded against position number on each side
• Track roller wear: each track roller tread wear measurement at flange and tread positions, top and bottom roller wear recorded separately, single-flange and double-flange positions noted
• Grouser bar height: grouser bar height measurement against the OEM new height, percentage wear and pad replacement requirement noted
• Master link condition: master link visual inspection for cracking, pin retention and bolt torque, secondary lock pin position confirmed
• Recoil spring condition: recoil spring grease pressure or stroke measurement against OEM specification, dust seal condition and tensioner adjustment recorded

How often should you complete this inspection checklist?

OEM undercarriage measurement standards and AS 4024.2601 together set the inspection cadence. The operator runs a visual pre-start undercarriage walk each shift, looking for cracked shoes, leaking final drives, missing pad bolts and obvious chain damage. A monthly inspection by a trained technician covers a visual walk of the full track group under stationary conditions. A 6-monthly competent-person inspection completes the full eight-metric undercarriage measurement report with shoe, chain pitch, link height, bushing, sprocket, idler, roller and grouser bar measurements. A 12-monthly major undercarriage measurement sits inside the carrier annual major service and is the formal record used for rebuild planning. Mining carriers on high-cycle production duty often pull the measurement cadence forward to 3-monthly, because the cost-per-hour calculation depends on accurate measurement of the wear curve. Any track derailment, sudden bushing failure, severe slope work or recoil spring discharge triggers an out-of-cycle inspection before the machine returns to service.

Applicable regulatory standards

This template aligns with the following regulations and standards:

• AS 4024.2601 (Earth-moving and road-construction machinery safety)
• ISO 6165 (Earth-moving machinery - Basic types - Identification and terms)
• OEM undercarriage measurement standards (CAT, Komatsu, Hitachi, Volvo)
• WHS Regulations 2011 Chapter 5 (Plant)
• Safe Work Australia CoP 2018 (Managing the risks of plant in the workplace)

Related resources

More safety templates and guides:

• excavator pre start checklist
• excavator monthly inspection checklist
• excavator 250 hour service
• excavator 500 hour service
• excavator 1000 hour service
• excavator 2000 hour service
• heavy equipment maintenance checklist
• equipment maintenance log
• preventive maintenance scheduling
• asset tracking
• plant compliance
• construction