Caterpillar 3512 — Overhaul (Major)
Repair & overhaul · Engine
For the Caterpillar 3512, from the Caterpillar owner's manual.
Applies to: Caterpillar 3512
Before you start
- Personal injury can result from air pressure. When using pressure air, wear a protective face shield and protective clothing.
- Do not use a high concentration of caustic cleaner to clean the core.
Procedure
- Replace connecting rod bearings, crankshaft seals, exhaust shields, gaskets and seals, main bearings, piston rings, and valve rotators.
- Inspect, rebuild, or exchange camshaft followers, connecting rods, cylinder liners, fuel transfer pump, oil pump, pistons, piston pins, prelube pump, scavenge oil pump, and turbochargers.
- Inspect the camshaft, camshaft bearings, crankshaft, crankshaft vibration damper, driven equipment alignment, gear train, gear train bushings, and spacer plates.
- Clean the oil cooler core and the aftercooler core; then pressure test both cores.
- Remove the core; remove debris by turning the core onto one end or upside-down.
- Back flush the core internally with cleaner to loosen foreign substances.
- Steam clean the core; flush the fins. Wash the core with hot, soapy water and rinse thoroughly.
- Dry the core with compressed air directed in the reverse direction of normal flow.
- Inspect for cleanliness; pressure test the core; repair if necessary; install the core.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Hydrosolv cleaners: use at a concentration of two to five percent and at a temperature up to 93 °C (200 °F)
- Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes
Full service-parts list: Caterpillar 3512 →
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.