Injection Pump Replacement - GMC G Service Manual

nder Number 8
A. Cyl
nder Number 7
B. Cyl
C. Cyl nder Number 2
D. Cyl nder Number 6
E. Cyl nder Number 5
F. Cyl nder Number 4
nder Number 3
G. Cyl
nder Number 1
H. Cyl
Figure 5 — Injection Line Routing
DIESEL FUEL INJECTION 6C2-5
H Install or Connect (Figures 4 and 5)
1. Injection lines at the pump.
• Uncap the lines and pump fittings.
• Refer to the tags for correct installation.
• Raise the vehicle (left bank of G-Models only).
2. Injection lines at the nozzles.
• Uncap the lines and nozzles.
Tighten
• Fittings to 25 N«m (20 ft. lbs.).
3. Injection line clips at the loom brackets.
4. Intake manifold. Refer to 6.2 LITER DIESEL (SEC.
6A6).
5. Injection line clips.
6. Intake manifold bolts.
Tighten
• Bolts to 42 N»m (31 ft. lbs.).
7. Crankcase ventilator bracket.
8. Air cleaner.
9. Engine cover (G-Models only).
10. Negative battery cables.

INJECTION PUMP REPLACEMENT

R/V MODELS
H Remove or Disconnect (Figures 6, 7 and 8)
1. Negative battery cable.
2. Intake manifold. Refer to 6.2 LITER DIESEL (SEC.
6A6).
3. Injection lines.
4. Accelerator cable at the injection pump (figure 6).
5. Detent cable (if equipped).
6. Fuel return line at the top of the injection pump.
7. Fuel inlet line from the injection pump.
8. All necessary wires and hoses from the injection
pump.
9. Air conditioning hose retainer bracket (if equipped).
10. Oil fill tube.
11. Grommet.
• Scribe or paint a mark on the front cover and the
injection pump flange.
• Rotate the engine to gain access to the bolts that hold
the driven gear to the injection pump.
— Access is gained through the oil filler neck hole
(figure 7).
12. Bolts (10).
13. Nuts (11) (figure 8).
B-08131
14. Pump.
• Cap all open lines and nozzles.
15. Gasket (12).