TM 5-3805-280-24-2
Fuel System
IN-LINE FUEL INJECTION PUMP TIMING
35
33
In-line fuel injection pumps are static lock-pin timed during
installation of pump.
Static Lock-Pin Timing, is accomplished by locking engine
at No. 1 TDC compression stroke. Align pump timing mark
on drive hub (B) and stationary timing pointer (A). Lock
the pump at this position with JDG886 Injection Pump
Timing Pin (C).
IMPORTANT: The normal backlash of gears is enough
to throw the pump timing off by several
A--Timing Pointer
degrees, resulting in poor engine
B--Mark on Drive Hub
performance. It is important that pump
C--Timing Pin
timing be rechecked after pump has
been installed.
NOTE: Normal engine rotation is counterclockwise,
viewed ftom flywheel end.
To check alignment of injection pump and eliminate
backlash of timing gear train, remove both timing pins and
rotate the flywheel opposite the direction of normal
rotation. Install JDE81-4 Timing Pin and rotate flywheel in
the direction of normal rotation until timing pin engages in
timing pin hole.
If JDG886 Timing Pin will not install through drive hub into
pointer hole (A), loosen drive gear cap screws and rotate
hub until timing pin can be installed and locked in place.
NOTE: When tightening pump drive gear cap screws,
apply light force (clockwise) to gear to eliminate
any backlash with camshaft gear.
Tighten pump drive gear cap screws to specifications.
Nippondenso Injection Pump Drive Gear Cap Screws--Specification
Torque ............................................................................. 47 Nm (35 lb-ft)
RG,35,JW7610
1920NOV971/1
13-412
