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 1295 of 1563
TM 9-2815-220-24
OIL PUMP REPAIR
0154 00
THIS WORK PACKAGE COVERS:
Disassembly, Cleaning, Inspection, Repair, and Assembly
INITIAL SETUP:
Tools:
Depth micrometer set (item 48, WP 0176)
General mechanic’s tool kit (item 121, WP 0176)
Inside micrometer caliper set (item 16, WP 0176)
Machine reamer set (item 92, WP 0176)
Outside micrometer caliper set
(item 17, WP 0176)
Socket wrench (item 107, WP 0176)
Socket wrench adapter (item 3, WP 0176)
Spring tester (item 117, WP 0176)
Telescoping gauge set (item 54, WP 0176)
Torque wrench, 0-300 inch-pounds
(item 124, WP 0176)
Torque wrench, 0-175 foot-pounds
(item 127, WP 0176)
Fabricated Item:
Modified socket (item 12, WP 0177)
Mandatory Replacement Parts:
Ball bearing (item 246, WP 0175)
Ball bearing (2) (item 291.1, WP 0175)
Key washer (item 26, WP 0175)
Self-locking nut (14) (item 33, WP 0175)
Self-locking nut (item 219, WP 0175)
Spring (item 287.1, WP 0175)
Spring (item 346.1, WP 0175)
Expendable and Durable Items:
Lubriplate (item 23, WP 0173)
Lock wire (item 44, WP 0173)
Personnel Requirements:
Track Vehicle Repairer (1) 63H10
Equipment Conditions:
Engine on maintenance stand (WP 0130)
Oil pump removed (WP 0153)
DISASSEMBLY
There are two oil pump assemblies in use and they are interchangeable.
The major difference
is the drive gears: on the newer model (12468945) the spur gear to cluster gear ratio provides a
higher operating speed of the pump.
This higher speed increases oil flow capability.
If you
have the older pump (11683982), it is acceptable for use, but is not supported in the RPSTL
nor in the repair manual.
You can identify which pump you have by counting teeth (A) on the
smaller gear circle of the cluster gear.
The high-speed pump has 26 teeth and the older low-
speed pump has 24.
Cluster Gear
A
Captive Screw
Oil Pump
Assembly
WP 0154 00-1
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