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 1229 of 1563

TM 9-2815-220-24

CYLINDER VALVES AND ASSOCIATED PARTS REPAIR

0145 00

THIS WORK PACKAGE COVERS:

Cleaning, Inspection, and Repair

INITIAL SETUP:

Tools and Special Tools:

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

Outside micrometer caliper set

(item 17, WP 0176)

Spring resiliency tester (item 118, WP 0176)

Expendable Materials:

Prussian blue paste (item 25, WP 0173)

Personnel Requirements:

Track Vehicle Repairer (1) 63H10

Equipment Conditions:

Cylinder assembly removed (WP 0133)

Valves removed (WP 0135)

CLEANING

1. See Work Package 0028 for General Cleaning Procedures.

INSPECTION

All parts must be inspected with care.

Replace parts if damage or wear exceeds

allowable limits.

1

2

1. See Work Package 0028 for General

Inspection Procedures.

2. Inspect exhaust (1) and intake (2) valves for

evidence of pitting, imperfect seating, cracks,

or warping of valve head.

Replace damaged

valves.

NOTE

Heavy discoloration, burning,

erosion, or heavy carbon deposit

on valve face indicates a warped

valve.

A light frosted appearance

or minor discoloration on valve

face does not indicate a warped or

unserviceable valve.

3. Inspect exhaust (1) and intake (2) valve

stems and the locking groove in the stems for

pitting, scoring, cracks, or damaged ends.

Replace valves if damage is found.

WP 0145 00-1