ROBERT BOSCH MODEL MW INJECTION PUMP
VALVE HOLDER MUST BE HELD
WITH A WRENCH TO PREVENT
PRESSURE PIPING IS REMOVED
FROM INJECTION PUMP. IF THE
DELIVERY VALVE HOLDER IS
FUEL LEAKAGE MAY RESULT.
Figure 20. - Removing Injection Pipes
Disconnect lubricating oil line from injection pump
and intake manifold line to aneroid line.
Remove ground and power supply from electric
10. Disconnect electric shutoff assembly from injection
pump by removing capscrew from shutoff lever and
mounting bracket from engine.
11. Disconnect fuel return hose at flex connector located
just below center of intake manifold. Fuel return
check valve is part of replacement injection pump
assembly. Low pressure fuel lines must remain with
the engine as they are not part of replacement
injection pump assembly. Fuel return hose between
fuel return check valve and engine fuel return
contains an orifice restriction fitting to limit fuel return
flow. Cap openings to keep dirt out of fuel system.
12. Disconnect fuel lines and hoses to supply pump.
Disconnect final filter hose to injection pump at final
filter header. Cap openings to keep dirt out of fuel
13. Remove injection pump drive gear access cover
capscrews, washers and bolts (Figure 21).
Figure 21. - Drive Gear Access Cover
14. Remove injection pump drive gear bolts and
washers from injection pump hub and remove pump
from engine (Figure 22).
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