Hummer H1 (1992-1998). Manual - part 31

 2-32. FUEL INJECTION PUMP REPAIR (Cont’d)

29. Install transfer pump end cap seal (2) in hydraulic head (1).

Use care when handling rotor weight retainer and hydraulic head
before retainers are installed. Rotor can fall out and cause damage
to components.

30. Install two rotor retainers (3) with cut out portions meeting over roll pin hole in hydraulic head (1).
31. Install liner locating ring (4) on hydraulic head (1) with split 90° from roll pin hole.

32. Install transfer pump liner (5) so slot aligns with roll pin hole in hydraulic head (1).

CAUTION

Blades must not be cocked during installation. Sharp edge of liner
can score blade ends.

NOTE

● 

Transfer pump blades are available in standard and oversize.

Oversize blades are marked in black and must be used whenever
possible.

● 

Oversize and standard transfer pump blades do not have to be

used as matched sets.

33. Install two springs (6) in four transfer pump blades (7) and install transfer pump blades (7)

in rotor (8).

2-112

Change 2        2-113

2-32. FUEL INJECTION PUMP REPAIR (Cont’d)

C

CA

AU

UT

TIIO

ON

N

Adjusting plug must not be installed past flush with end of
regulator or pump damage will result.

34.

Install piston (10), spring (13), and adjusting plug (11) in regulator (9). Tighten adjusting plug (11)
until flush with end of regulator (9).

N

NO

OT

TE

E

Early production injection pumps have an inlet filter screen,
retaining ring, and seal or pressure plate. Late production pumps
have a different configuration screen which does not require a
retaining ring and seal or pressure plate. When repairing early
production pumps, replace the screen with a late production one.

35.

Deleted

36.

Install filter screen (12) on regulator (9).

37.

Lightly coat filter screen assembly (14) and threads of transfer end cap (16) with seal lubricant.

38.

Install filter screen assembly (14) and end cap (16) on hydraulic head (1). Apply slight pressure on
top of end cap (16) and rotate counterclockwise until a slight click is heard.

39.

Turn end cap (16) clockwise until snug.

40.

Install inlet tube assembly (15) on end cap (16).

2-32. FUEL INJECTION PUMP REPAIR (Cont’d)

41. Install six governor weights (3) in weight retainer (4).

NOTE

Governor weights must work freely after installation.

42. Install thrust washer (2) and thrust sleeve (1) into lower slots of governor weights (3).

2-114

2-32. FUEL INJECTION PUMP REPAIR (Cont’d)

43.  Align timing mark (11) on drive shaft (5) and timing mark (6) on rotor (7).

44. Apply light coat of seal lubricant to inside edge of housing (12).
45.

Rotate cam ring (9) so index mark (11) is aligned with timing cover access hole (13).

CAUTION

Hydraulic head must only be installed far enough to install head
locking screws, or leakage and damage to hydraulic head O-ring
seal will result.

46. Install hydraulic head (10) in housing (12) with slight rotary motion.
47. Rotate head (10) and align head locking capscrew holes with holes in housing (12).
48.

Install two head locking capscrews (8) finger tight.

2-115