TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 133 of 1563

TM 9-2815-220-24

ENGINE ABNORMAL OIL PRESSURE

0018 00

THIS WORK PACKAGE COVERS:

Troubleshooting Table and Diagnostic Tests

INITIAL SETUP:

Tools:

General mechanic’s tool kit (item 121, WP 0176)

Personnel Required

Track Vehicle Repairer (2) 63H10

Equipment Conditions:

Engine installed in vehicle or ground hop.

MALFUNCTION 1:

Low oil pressure, temperature normal.

PROBABLE CAUSE

CORRECTIVE ACTION

a. Low oil level.

(1) Refer to WP 0031, Engine Oil Replacement.

b. Seasonal grade of oil improper (oil too

light) for ambient temperature.

(1) Check oil in engine.

Drain and refill with

proper grade of oil (refer to pertinent

lubrication order).

c. Oil diluted with fuel.

(1) Refer to Malfunction 9 in this work

package.

(1) Check electrically (refer to pertinent vehicle

technical manual).

d. Pressure sending unit or gauge defective.

(2) Repair or replace as required.

e.

Oil pressure regulator valve malfunction.

(1) Inspect for sticky or defective valve.

Repair

or replace as required

(WP 0074,

Damper/Oil Filter Housing Related Parts

Replacement).

f.

Defective oil pump or obstructed oil pickup

screen.

(1) Remove oil pump and inspect pump and

screen (WP 0153, Oil Pump Assembly

Replacement).

(1) Check for deposits in filter.

If found,

disassemble engine, clean and repair as

required (WP 0178, Disassembly/Assembly

Procedure Sequence for the AVDS 1790-2

Engine).

g. Crankshaft bearing worn or damaged.

(2) Check for damage (WP 0139, Crankshaft

Replace/Repair).

WP 0018 00-1