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 245 of 1563
TM 9-2815-220-24
FUEL INJECTION PUMP TIMING CHECK
0036 00
THIS WORK PACKAGE COVERS:
Introduction, Removal, Timing Check, Timing Adjust, and Installation
INITIAL SETUP:
Tools:
Breaker bar, 3/4-inch (used with 2DR engine
turning tool)
Engine (flywheel) turning tool for 2CA/2DA:
splined wrench (item 136, WP 0176)
General mechanic’s tool kit (item 121, WP 0176)
Fabricated Items:
Engine (flywheel)
turning tool, 2DR only (item 4,
WP 0177)
Mandatory Replacement Parts:
Gasket (2) (item 329, WP 0175)
Personnel Required:
Track Vehicle Repairer (2) 63H10
Equipment Conditions:
Engine removed from vehicle and placed on a
flat stationary surface
INTRODUCTION
The engine crankshaft and camshafts must be properly oriented before checking the fuel
injection pump timing.
It is possible for the external timing marks on the fuel injection pump
and on the engine flywheel to align and still have the fuel injection pump be 180 degrees out
of phase.
The fuel injection pump has external timing marks (A) as well as an internal gear
tooth marking (B).
The fuel injection pump drive coupling rotates two times to each
revolution of the internal gear tooth that is part of the timing process.
In addition, the
crankshaft rotates two times to each revolution of the camshafts.
Strict attention to the
procedure must be observed.
Flywheels between Models 2DA and 2DR are different and are not interchangeable.
Timing
markings are identical.
However, on Model 2DA, a timing pointer is affixed to the
transmission housing, while on Model 2DR there are scribed markings on the transmission
housing.
Methods for turning the crankshaft between models require different turning tools (see
WP 0034, Intake and Exhaust Valve Clearance Adjustment).
For instructional purposes, a 2DR Model is described and illustrated.
Timing is identical for
all 2-series engines.
WP 0036 00-1
A
B
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