ENGINE DIAGNOSTIC TEST PROCEDURES
Section 6
•
INJECTION PUMP INITIAL TIMING (Continued)
400 Series On-Highway
(with Robert Bosch MW Pumps)
If static timing is NOT within specifications, adjust pump
to engine timing as follows:
1.
Rotate engine to correct crankshaft position (static
timing) as specified in PERFORMANCE DATA
GUIDELINES, in this Section.
2.
Loosen injection pump drive gear bolts and washers
to injection pump hub (Figure 22).
Figure 22. MW Injection Pump Drive Gear
3.
Rotate pump clockwise (as viewed from drive
gear end) until timing mark on pump drive hub is aligned
with timing pointer in adapter hole (Figure 20).
4.
Rotate
loosened
pump
drive
gear
in
counterclockwise direction (as viewed from drive
gear end) to 3/4 of full extent of drive gear bolt slots.
5.
With injection pump in position, secure pump
adapter to front plate with bolts, nuts and washers.
Tighten bolts and nuts to 33 N•m (24 Ibf-ft) torque.
6.
Verify alignment of pump timing pointer to hub mark
through mounting adaptor opening. Rotate pump
drive hub as required for proper alignment. Tighten
pump drive gear to 47 N•m (35 Ibf-ft).
CGES-240-4
Printed in United States of America
Page 29
