Vanguard OHV V-Twin User Manual page 148

Models 540000, 610000
1. Remove two screws (6) and breather cover (5),
Fig. 15.
2. Lift off the outer baffle (4).
3. Remove the reed valve assembly (3) and O-ring.
4. Remove the inner baffle (2) from the valve
cover (1).
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Fig. 15
Check Breather
Check for loose rivets and for damage to the reed
valve, reed stop and housing. If any of the components
are worn or damaged, or if the reed valve does not lay
flat over the opening, replace the assembly.
Install Breather
NOTE: For correct alignment,
components have one corner that is a
sharper radius than the others. DO NOT
force components into an incorrect position.
1. Install the inner baffle with raised edges facing
OUT.
2. Install the reed valve assembly into the valve
cover, reed valve facing out.
3. Install the O-ring over the reed valve assembly.
Use fingertips to seat the O-ring into the valve
cover.
4. Position the outer baffle into the breather cover
with the 3 bosses facing OUT.
5. Install the breather cover and baffle onto the
valve cover.
6. Reinstall screws.
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the breather
Oil Pump
Inspect
Inspect pump drive gear (2) for worn or chipped
teeth. Inspect inner pump rotor (4), outer pump rotor
(1), housing (3) and crankcase cover or sump for
scoring or wear. Replace as required.
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Fig. 16
Assemble Oil Pump
Lubricate rotors with oil. Install in pump with dimples
aligned (5), Fig. 16.
Oil Fill Tube and Dipstick
All Models – Except 540000, 610000
The oil fill tube (3) and the dipstick (1) are equipped
with O-rings (2) and/or a grommet (4) for proper
sealing, Fig. 17.
NOTE: A leak at the seal between the tube and
sump, or at the seal at the upper end of the
dipstick, can result in a loss of crankcase
vacuum and a discharge of oil or smoke
through the muffler.
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Fig. 17
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