Caterpillar 3512 — Fuel System Secondary Filter - Replace
Maintenance · Fuel filter
For the Caterpillar 3512, from the Caterpillar owner's manual.
Applies to: Caterpillar 3512, Caterpillar 3512B engine
Before you start
- Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire
- Personal injury can result from parts and/or covers under spring pressure
Procedure
- Shut off the fuel supply valve to the engine.
- Connect a hose to the drain valve; drain the fuel; close the valve.
- Gradually loosen but do not remove the bolts to relieve spring pressure.
- Remove the bolts, washers, and cover.
- Remove the spring, retainer, and filter elements.
- Clean the cover, O-ring seal, and inside of the fuel filter housing.
- Install new fuel filter elements.
- Install the retainer and spring.
- Inspect the O-ring seal; install a new one if damaged.
- Install the cover; ensure springs are seated; secure with bolts and washers.
- Open the fuel supply valve.
- Prime the fuel system.
Specs & values
- Replace at 103 kPa (15 psi) differential pressure or 1000 service hours
Full service-parts list: Caterpillar 3512 →, Caterpillar 3512B engine →
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.