500 Hour Service Checklist: Filters, Oil Samples and What Changes

What the 500 hour service is for

The 500 hour service is where filters get changed and oil samples get taken. It includes everything in the 250 hour service, plus a set of items that only need doing every second time around.

You will do a 500 hour service at 500 hours and again at 1500 hours. At 1000 and 2000 hours, the 500 items are done as part of the bigger service.

This is a general guide, not a service manual. Service items and intervals vary by make, model, attachments and working conditions. Always follow the manufacturer's maintenance schedule and manual for each machine, and have servicing done by someone qualified to do it. Use this page to plan and check your work, not to replace the manual.

500 hour service checklist

Everything from the 250

Engine oil and filter, greasing, fuel water separator, fluid level checks and the walk-around. See the 250 hour checklist.

Filters

• Replace the fuel filters, primary and secondary. Dirty fuel is one of the most common causes of injector trouble on modern diesels.
• Replace the hydraulic return filter or pilot filter, if the manual calls for it at this interval.
• Replace the cab air filter. In dusty work it may need doing more often.
• Clean or replace the engine air filter elements according to the restriction indicator and the manual.

Oil sampling

• Take oil samples from the engine and hydraulics, and from the transmission, final drives and swing drive if your sampling program includes them. Many operators also sample coolant.
• Take samples from warm oil, from the same point each time, before any oil is changed.
• Label each sample with the machine, compartment, hour reading and hours on the oil, and send them to the lab.

Inspections

• Check the radiator, oil cooler and charge air cooler for blockage and damage. Blow out the cores if they are packed.
• Check battery terminals and condition.
• Inspect hydraulic hoses closely, especially where they flex or sit near heat.
• On tracked machines, check undercarriage wear more closely: pads, rollers, idlers and sprockets.
• Check the swing gear and swing bearing grease on excavators.

Why oil samples matter most at 500

A single oil sample tells you a little. A run of samples from the same compartment tells you a lot. The 500 hour sample is often the first one on a machine, and it becomes the baseline that later samples are compared against.

The lab report shows wear metals, dirt and contamination. Rising iron can point to engine wear. Silicon usually means dirt is getting past the air filter or a seal. Coolant in the engine oil needs attention straight away. You only see these trends if samples are taken at regular intervals and kept against the right machine.

Parts to order before the machine comes in

• Engine oil filter and engine oil
• Primary and secondary fuel filters
• Hydraulic return or pilot filter, if due
• Cab air filter
• Air filter elements if the indicator shows they are due
• Oil sample bottles and labels
• Grease

Order these when the machine is 50 to 100 hours out from the service, not on the day. Filters for older or less common machines can take days to arrive.

How long it takes

Usually three to four hours with the parts ready, plus the time to pack and send the oil samples.

The 1500 hour service

There is no separate 1500 hour list on most machines. At 1500 hours you do a 500 hour service again: the 250 items plus the 500 items, and another round of oil samples to compare against the samples from 500 and 1000 hours.

What gets missed at 500 hours

• Ordering parts late, so the machine sits waiting for filters.
• Oil samples that are never sent, or sent without the hour reading and compartment written on them.
• The cab filter, which matters to the operator breathing behind it all day.
• Recording what went in, so the next service has no idea which filters or oil were used.

Where the 500 fits in the cycle

• 250, 750, 1250, 1750 hours: a 250 hour service
• 500 and 1500 hours: a 500 hour service
• 1000 hours: a 1000 hour service
• 2000 hours: a 2000 hour service

For the full picture, see service intervals explained.

Keeping track of it in Burgy

Burgy counts every machine down to its next service and warns you when it enters the prep zone, so there is time to order parts. Each machine has a parts kit for each service level, and you can raise a purchase order straight from the kit and email it to your supplier.

During the service, the oil samples are recorded against each compartment on that machine, and Burgy prints the oil sample labels with the machine, compartment and hours already filled in, ready for the lab.