chevrolet Workshop Repair Guides

Chevrolet Workshop Service and Repair Manuals

Injection Pump Off-Truck Service|Page 1438 > < Injection Pump Off-Truck Service|Page 1436
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Fig. 37 Side housing & drive group

HYDRAULIC HEAD SEAL O-RING, REPLACE
Removal

1.

Remove throttle shaft and seals.

2.

Remove metering valve, Fig. 33.

3.

Remove housing vent screw assembly, Fig. 37.

4.

Remove advance pin hole plug and advance pin, Fig. 36.

5.

Remove head locating screws and seal.

6.

Remove hydraulic head assembly and O-ring.

Fig. 36 Automatic advance group

Installation

1.

Install hydraulic head seal and place head assembly into pump housing.

2.

Install two head locking screws finger tight and turn pump upside down.

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