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 231 of 1563
TM 9-2815-220-24
INTAKE AND EXHAUST VALVE TIMING PROCEDURE
0035 00
THIS WORK PACKAGE COVERS:
Introduction, Removal, Timing Check, Timing Adjustment, and Installation
INITIAL SETUP:
Tools:
Breaker bar, 3/4-inch used with 2DR engine
turning tools (tool crib)
Engine (flywheel) turning tool, for 2CA/2DA:
splined wrench (item 136, WP 0176)
General mechanic’s tool kit (item 121, WP 0176)
Mechanical puller (item 89, WP 0176)
Thickness gauge blade (0.010) (item 55,
WP 0176)
Thickness gauge blade (0.100) (item 57,
WP 0176)
Torque wrench, 0-300 inch-pounds (item 124,
WP 0176)
Fabricated Items:
Engine (flywheel)
turning tool, 2DR only (item 4,
WP 0177)
Fabricated Items:
Engine (front end) turning tool, 2DR only
(item 3, WP 0177)
Mandatory Replacement Parts:
Gasket (item 329, WP 0175)
Gasket (2) (item 350, WP 0175)
Retaining ring (item 12, WP 0175)
Expendable and Durable Items:
Lubriplate (item 23, WP 0173)
Personnel Required:
Track Vehicle Repairer (2) 63H10
Equipment Conditions:
Engine removed from vehicle and placed on a
flat stationary surface
INTRODUCTION
Valve timing is checked with cylinder numbers 6R and 6L intake valve clearance set at 0.100-
inch.
The flywheel is stamped with timing marks "6R INT CLOSE 0.100 CLR" for timing the
right camshaft with the crankshaft, and marked "6L INT CLOSE 0.100 CLR" for timing the
left camshaft with the crankshaft.
Flywheels: 2CA and 2DA are the same; however, 2DRs are different and are not
interchangeable.
Timing markings, described above, are identical.
However, on Models 2CA
and 2DA, a timing pointer is affixed to the transmission housing, while on Model 2DR there
are scribed markings on the transmission housing.
For instructional purposes, the timing of the right camshaft on a 2DR Model is described and
illustrated.
Right and left camshaft timing is identical.
Timing on all models is identical.
WP 0035 00-1
Model 2DR
Flywheel/Transmission housing timing marks.
Models 2CA, 2CB, and 2DA
Flywheel and Pointer
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