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 223 of 1563

TM 9-2815-220-24

CYLINDER COMPRESSION TEST

0033 00

THIS WORK PACKAGE COVERS:

Before Test, Test, and After Test

INITIAL SETUP:

Tools:

Cylinder compression adapter (item 1, WP 0176)

Cylinder compression gauge (item 24, WP 0176)

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

Mandatory Replacement Parts:

Gasket (12) (item 272, WP 0175)

Expendable and Durable Items:

Lubriplate (item 23, WP 0173)

Personnel Required:

Track Vehicle Repairer (2) 63H10

Equipment Conditions:

Engine at normal operating temperature with

fuel supply cut off.

Fuel injector nozzle assemblies removed (WP

0114)

BEFORE TEST

WARNING

All nozzles must be removed when performing a compression check.

Nozzle removal will prevent the possibility of the engine firing on

other cylinders when the engine is cranked, and permits the engine to

be cranked at the required rpm to check compression.

Unexpected

starting of the engine could injure personnel.

NOTE

Compression testing must be performed within 1 hour after stopping

engine.

1. With all nozzles removed from engine, crank engine for 30 seconds to clear cylinders of

possible sources of ignition.

2. Position new injector nozzle gasket (flat washer) (1) (item 272, WP 0175) on end of

compression adapter (2) (item 1, WP 0176).

Apply a light coating of Lubriplate (item 23,

WP 0173) on gasket so it adheres to adapter when installed in cylinder.

2

1

WP 0033 00-1