ENGINE HAS LOW OIL PRESSURE

Custom Search

Back
COOLANT IN LUBRICATION OIL

Up
TM-5-2815-232-14 Engine Diesel Caterpillar Model 3508 Manual

Next
ENGINE COOLANT IS TOO HOT

TROUBLESHOOTING

TESTING AND ADJUSTING

25. ENGINE HAS LOW OIL PRESSURE

Cause:

Correction:

Dirty Oil Filters or Oil Cooler

Check the operation of bypass valve for the filter. Install

new oil filters if needed. Clean or install new oil cooler

core. Remove dirty oil from engine. Put clean oil in

engine.

Diesel Fuel in Lubrication Oil

Find the place where diesel fuel gets into the lubrication

oil. Make repairs as needed. Remove the lubrication oil

that has diesel fuel in it. Install new oil filters. Put clean

oil in the engine.

Too Much Clearance Between Rocker Arm Shaft

Check lubrication in valve compartments. Install

and Rocker Arms

new parts as necessary.

Oil Pump Suction Pipe Has A Defect

Replacement of pipe is needed.

Oil Pressure Relief Does Not Close

Clean valve and housing.

Install new parts as

necessary.

Oil Pump Has A Defect

Repair or replace oil pump.

Too Much Clearance Between Crankshaft and

Inspect the bearings and make replacement as

Crankshaft Bearings

necessary.

Too Much Clearance Between Camshaft and Cam-

Install new camshaft and camshaft bearings if

shaft Bearings

necessary.

Defect in Oil Pressure Gauge

Install new gauge.

26. ENGINE USES TOO MUCH LUBRICATION OIL

Cause:

Correction:

Too Much Lubrication Oil In Engine

Remove extra oil. Find where extra oil comes from. Put

correct amount of oil in engine. Do not put too much oil

in engine.

Oil Leaks

Find all oil leaks. Make repairs as needed. Check for

dirty crankcase breather.

Oil Temperature is Too High

Check operation of oil cooler. Install new parts if

necessary. Clean the core of the oil cooler.

Too Much Oil in the Valve Compartment

Be sure that the dowel is installed in the left bolt hole of

the rocker shaft. The dowel is located between the

rocker shaft and valve cover base.

Worn Valve Guides

Reconditioning of the cylinder head is needed.

Worn Piston Rings

Inspect and install new parts as needed.

Failure of Seal Rings in Turbocharger

Check inlet manifold for oil and make repairs to the

turbocharger if necessary.

104