Vanguard BIG BLOCK M540000, Repair Manual

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1. Remove 4 fasteners ( A , Figure 139) to release oil
scavenge pump gerotor cover ( B ) from the crankcase
cover ( C ).
139
2. Remove o-ring ( A , Figure 140) from the crankcase cover
groove.
140
3. Remove inner and outer gerotors ( B ) from gear shaft.
4. Remove oil filter screen ( C ).
5. Remove roll pin ( A , Figure 141) from hole in gear shaft.
141
6. On opposite side of crankcase cover,
remove gear shaft assembly from crankcase cover.
Optional Oil Guard System - Assembly
Oil Guard Oil Scavenge Pump - Install
Using Figures 139, 140, 141 for reference, install the oil
scavenge pump as follows:
1. Install the gear shaft assembly into the crankcase cover.
2. Install the roll pin into the hole in the gear shaft.
3. Install the oil filter screen.
4. Install the inner and outer gerotors onto the gear shaft.
5. Install
new o-ring into the crankcase cover groove.
6. Install the oil pump cover onto the crankcase cover.
7. Start by hand the 4 cover fasteners. Tighten to
90 lb-in
(10.2 Nm).
Oil Guard Oil Supply Pump - Install
Using Figures 136, 137, and 138 for reference, install the oil
supply pump as follows:
1. Install the gear shaft assembly into the crankcase cover.
2. Install the thrust washer onto the gear shaft on the
opposite side of the crankcase cover.
3. Install the crescent ring onto the groove of the gear shaft.
4. Install the roll pin into the hole on the gear shaft.
5. Install the oil filter screen.
6. Install the inner and outer gerotors onto the gear shaft.
7. Install
new o-ring into the crankcase cover groove.
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