Hummer H1 Service Manual page 124

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FUEL INJECTION PUMP INSTALLATION
1. Install injection pump gasket on front cover studs.
2. Mount injection pump on front cover studs (Figure 2-169).
Install retaining nuts finger tighten.
3. Rotate crankshaft if necessary, to place timing mark on
injection pump drive gear at 12 o'clock position.
4. Install pump driven gear into fron cover so the timing
mark on the driven gear aligns with the timing mark on the
drive gear.
5. Turn pump shaft (not gear), until shaft pin aligns with slot
in driven gear. Then slide pump into place and secure it
with gear attaching bolts. Apply 1-2 drops Loctite 242 to
bolt threads beforehand and tighten bolts to 13-20 lb-ft
(18-27 N•m) torque. Tighten pump retaining nuts to 31 lb-
ft (42 N•m) torque.
6. Perform Timing Setting Procedure to adjust injection
pump timing. Pump may also require TDC offset
adjustment if front cover was replaced, or PCM was
replaced with the fuel injection pump.
FRONT COVER
PUMP
TIMING MARK
GASKET
Figure 2-169: Injection Pump Installation
DRIVEN GEAR
CAMSHAFT
PIN
Figure 2-170: Pump Driven Gear Installation
05745159
PUMP
TIMING MARK
INJECTION
PUMP
6-S02-050.1
DRIVE GEAR
WATER PUMP AND ADAPTER PLATE
INSTALLATION
1. Apply Permatex #2 to both sides of gasket and install gas-
ket and water pump on adapter plate (Figure 2-171).
Tighten adapter plate bolts to 13-20 lb-ft (18-27 N•m).
ADAPTER PLATE
WATER PUMP
GASKET
Figure 2-171: Assembling Water Pump and Adapter
2. Apply Loctite gasket maker or 510 to contact area of
adapter plate as shown (Figure 2-172).
ADAPTER
PLATE
Figure 2-172: Adapter Plate Sealer Application
3. Install adapter plate and water pump on front cover.
Tighten all studs and short bolts marked A to 13-20 lb-ft
(18-27 N•m). Tighten large studs and large bolt marked B
to 25-37 lb -ft (34-50 N•m) (Figure 2-173).
Engine 2-87
Plate
SEALER
BEAD