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Construction equipment management software › Equipment maintenance log

Heavy equipment maintenance log: what to record, with a filled-in sample

A heavy equipment maintenance log records, for every service or repair, the date, the hour meter reading, what was done, the parts and fluids used, who did it and what it cost. Keep one per machine, plus the daily walk-around. OSHA expects frequent and regular equipment inspections by a competent person (29 CFR 1926.20(b)(2)).

Updated November 2026. OSHA rules read on osha.gov on November 13, 2026.

The fields, and why each one matters

FieldWhy it's there
Machine ID, make, model, serial (PIN)Warranty claims, parts lookup and theft reports all start with the serial.
DateTime-based intervals ("500 hours or 3 months") and warranty dates.
Hour meter readingThe next service counts from this number, not from the date.
Type: scheduled, repair or inspectionSeparates planned service from breakdowns, which is the number that tells you a machine is wearing out.
Work doneIn plain words, with the service level (250, 500, 1,000, 2,000 hours).
Parts and fluids, with quantitiesFilter part numbers, gallons of oil; the next kit is this list again.
Fluid samples sentOil analysis trends only work if every sample is logged with its hours.
Fault codes seenSPN and FMI, so a repeat code shows up as a pattern.
Done byMechanic, dealer or operator; who to ask later.
Labor hours and costCost per machine hour, the repair-or-replace number.
Next service due atThe hour mark that keeps the next one from slipping.

To start a log in a spreadsheet, paste this header row: Machine ID, Make, Model, Serial, Date, Hours, Type, Work done, Parts and fluids, Samples sent, Fault codes, Done by, Labor hours, Cost, Next due at.

A filled-in sample: one excavator, four months

A made-up example to show the format. Service levels follow a Cat dealer's plan; your machine's operation and maintenance manual sets the real list.
DateHoursTypeWork doneParts and fluidsByLabor hNext due
Jul 71,502Scheduled500-hour service: engine oil and filter, fuel filters, fuel-water separator, hydraulic filters, primary air filter, grease; oil samplesOil and filter kit, 2 fuel filters, separator element, 2 hydraulic filters, air filterShop3.51,750 h
Aug 121,688RepairReplaced chafed hydraulic hose on boom, found at walk-around1 hose assembly, 3 gal hydraulic oilShop2.01,750 h
Aug 261,751Scheduled250-hour service: engine oil and filter, grease, check levels, engine oil sampleOil and filter kitOperator and shop1.52,000 h
Sep 181,866RepairFault SPN 3251 FMI 0 (DPF pressure high); parked regen, clearedNoneOperator0.52,000 h
Oct 272,004Scheduled2,000-hour service: everything in the 1,000, plus secondary and cab air filters, cooling hoses, hydraulic oil per manual1,000-hour kit, 2 air filters, hydraulic oilDealer7.02,250 h

Two habits make this log useful. Write the hours every time, even for a small repair, and keep the service ladder on its fixed marks: if the 250-hour service happens at 1,751 hours, the next one is still at 2,000, not 2,001.

The daily walk-around log

The daily check is a separate, shorter log: date, hours, operator, and a pass or fail on each item, with a note for any fail. For earthmoving machines the list usually covers fluid levels, leaks, tracks or tires, hoses, guards, steps and handholds, lights, the horn and backup alarm, the seat belt and the fire extinguisher. OSHA's 1926.602 requires seat belts and brakes on that equipment, a horn on bidirectional machines, and a backup alarm (or a signal person) when the rear view is blocked. A failed item goes to the shop as a repair, and the machine is tagged out if it's unsafe (1926.20(b)(3)). The inspection guide has a fuller checklist.

When the spreadsheet stops working

Maintenance software keeps this log for you: Fleetio and Simply Fleet record service entries and history, GearJoT keeps one record per piece of gear, and HCSS Equipment360 keeps each machine's full history on the mechanic's tablet. Dozer doesn't keep a service history: it holds each machine's current hours, next service and repair tickets, with the hours from a photo of the meter, so the log itself stays in a spreadsheet or a maintenance tool. Dozer Machines

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