TM 10-3950-672-24-2
Both pumps have a provision for locking the pump shaft
at a position corresponding to top-dead-center for
Cylinder Number 1. New and reconditioned pumps
should be received with the shafts locked in this
position.
Note: The illustration shows pumps for the 4
cylinder and has the keys aligned with the number 1
delivery valve.
The engine is equipped with an engine timing pin to
locate TDC for Cylinder Number 1.
Caution: If the timing pin is incorrectly located on
the gear housing, the timing procedure will not
ensure that the pump is timed correctly.
After precisely locating TDC for Cylinder Number 1, the
factory positions the timing pin assembly to the gear
housing using the timing pin and the hole in the
camshaft gear. If the gear housing or timing pin
assembly are removed, the same precision is required
to relocate it
Caution: The flange of a replacement pump must be
marked to align with the mark on the gear housing
after installation.
During production, after the locked pump is fitted to the
engine with Cylinder Number 1 at TDC, a mark is
stamped on the gear housing and the pump flange.
Thereafter, when these marks are aligned, the pump is
correctly timed to the engine.
Note: The marks on the gear housing and the pump
flange are unique to each engine.
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