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Vanguard
TM
Twin-Cylinder OHV Liquid-Cooled Engine
Section 4 - Engine Overhaul
Page 44
3. Place a shop rag or short section of rubber fuel
line under valves inside combustion chamber to
hold valve in place while compressing spring.
4. Install springs and valve spring retainers over
valve stems.
5. Temporarily, install rocker arm support screws in
cylinder head.
6. Compress valve spring with Tool
#19347 and
install split retainers, Fig. 92.
Repeat procedure for other valves. Remove rocker arm
screws.
Fig. 92
OIL PUMP
Disassemble Oil Pump
1. Remove two screws and oil pump gear baffle ,
Fig. 93.
Fig. 93
2. Remove oil pick-up tube and screen assembly
.
a. Discard O-ring.
Inspect Oil Pump
Inspect pump drive gear for obvious wear or chipped
teeth. Inspect pump rotors, housing and crankcase cover
or sump for scoring or wear. Replace as required.
Assemble Oil Pump
Lubricate outer rotor with oil and install in pump, Fig. 94.
Fig. 94
1. Assemble oil pick-up tube and screen assembly
with new O-ring to pump.
a. Torque screw to 70 in. lbs. (8.0 Nm).
2. Install oil pump gear baffle, Fig. 95.
a. Torque screw to 70 in. lbs. (8.0 Nm).
3. Assemble oil pump to crankcase cover with new
O-rings, Fig. 95.
49


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