TM 9-2320-260-34-1
5-23. FUEL PUMP HOUSING MAINTENANCE (Contd)
8. Remove two setscrews (2) and throttle stop (3) from throttle shaft (1).
NOTE
Perform steps 9 through 11 if inspection or calibration of fuel
pump requires the replacement of throttle adjustment screw.
9. Using 0.25 in. (6.35 mm) drill bit, remove ball bearing(6) from throttle shaft (1). Discard ball
bearing (6).
10. Remove throttle adjustment screw (5) from throttle shaft (1).
11. Remove O-ring (4) from throttle adjustment screw (5). Discard O-ring (4).
1. Inspect housing (7) for cracks and breaks. Replace housing (7) if cracked or broken.
2. Inspect governor barrel (8) for scratches and nicks. Replace housing (7) if governor barrel (8) is
scratched or nicked.
3. Inspect throttle shaft (1) for nicks, burrs, scores, and damaged threads. Replace throttle shaft (1)
if nicked, burred, scored, or threads are damaged.
d. Assembly
NOTE
Perform steps 1 and 2 if throttle adjustment screw was removed.
During assembly of fuel pump, the ball bearing or throttle shaft
cover is installed after fuel pump is calibrated.
1. Apply lubricating oil to new O-ring (4) and install on throttle adjustment screw (5).
2. Install throttle adjustment screw (5) on throttle shaft (1). Turn throttle adjustment screw (5)
six turns.
3. Install throttle stop (3) on throttle shaft (1) with two setscrews (2). tighten each setscrew (2)
70-90 lb-in. (8-10 Nm).
5-64
