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 849 of 1563

TM 9-2815-220-24

ROCKER ARM ASSEMBLY AND COVER REPAIR

0105 00

THIS WORK PACKAGE COVERS:

WP 0105 00-1

Inspection, Repair

INITIAL SETUP:

Tools:

Dial indicator (item 65, WP 0176)

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

Machinist vise (item 132, WP 0176)

Magnifying glass (item 73, WP 0175)

Outside micrometer caliper set (item 17,

WP 0176)

Telescoping gauge set (item 54, WP 0176)

Personnel Requirements:

Track Vehicle Repairer (1) 63H10

Equipment Conditions:

Rocker arm cover assemblies removed

(WP 0104)

CAUTION

The cylinder and rocker arm cover are machined as an assembly.

The number on the rocker arm cover must match with its mating

number on the cylinder to ensure camshaft bearing alignment and

running clearance.

If a rocker arm cover is damaged, the entire

cylinder and rocker arm cover must be replaced.

NOTE

The engine has 12 rocker arm cover assemblies.

The following

procedures apply to one or all covers.

This procedure shows the

replacement of the exhaust rocker arm only.

Each rocker arm cover assembly contains both exhaust and intake

rocker arms.

Both rocker arms are removed, repaired, and installed

in the same manner.

In addition, clearances and specifications

provided in this work package apply to both intake or exhaust

components.