Service manual

10
NOTE - Chain oiler adjusting screw has tapered end and must
be used. Substituting standard machine screw for tapered
screw will result in large oil loss out breather.
3. Turn screw out
1
⁄2 turn and tighten locknut
against brass washer and body.
NOTE - After engine has been run for a while it may be
necessary to adjust screw to achieve desired oil flow to
primary chain. Final screw setting is usually closer to fully
closed position.
CAUTION - Overtightening screw may damage threads or
adjusting screw seat in pump body.
b. 1965-1984 engines with primary chain drive
and dry clutch.
1. Install #31-6010 hose fitting in threaded
hole #8 on top of pump cover.
2. Connect #31-6010 fitting to primary chain
oiler line after pump is installed.
3. For 1965-1972 engines using #31-6001
pump body, install #31-6026 adjuster
screw, #31-6035 brass washer, and
#31-6027 lock nut into threaded hole in
side of pump body. See Picture 31.
Bottom screw two or three times to seat
screw. Turn screw out approximately 1
1
⁄2
turns and tighten locknut against brass
washer and oil pump body.
NOTE - Above setting should provide 1 to 1
3
⁄ 4 oz’s/minute oil
flow to primary chain @ 2500 RPM. This can be confirmed
after engine has reached operating temperature by
disconnecting hose to primary chain, operating engine at 2500
RPM and measuring oil delivered into measuring container
during one minute.
CAUTION - Overtightening adjustment screw may damage
oil pump body.
4. No adjusting screw is provided for
1965-1969 engines using #31-6073
pump body because primary chain oil
is metered by breather gear.
NOTE - Use of #31-6073 oil pump body requires that Step #6
be performed and that 1973-later style breather gear such as
S&S #31-4239 be used.
c. 1984-later engines with sealed primary - Install
#31-6028
1
⁄16 -27 pipe plug in hole #8 on top of
pump cover.
d. All engines with primary belt drive
1. Install #31-6028
1
⁄16 -27 pipe plug in hole
#8 on top of pump cover.
2. For 1936-1964 engines using #31-0001
pump body, loosen locknut and screw
adjusting needle into side of pump body
until oil supply to primary chain is
completely shut off, then retighten
locknut. Do not overtighten locknut or
adjusting screw.
NOTE - Installing machine screw #31-6029 in pump body
instead of adjusting screw will result in large oil losses out
crankcase breather. Tapered adjusting screw #31-6026 must
be used for proper adjustment of oil flow to primary chain.
CAUTION - Overtightening adjustment screw may damage
oil pump body.
4. Optional Rear Chain Oiler - 1936-1991 models
with chain drive
a. Perform following steps if rear chain oiler is
desired:
1. Install #31-6038 hose fitting in hole #6 in
pump cover. See Picture 3.
2. Install #31-6026 adjuster screw, #31-6035
brass washer, and #31-6027 lock nut in
hole #7 in pump cover.
3. Attach hose fitting to rear chain oiler hose
after oil pump is installed.
4. Adjust screw to provide desired amount
of oil to rear chain and tighten locknut.
CAUTION - Overtightening adjustment screw may damage
oil pump cover.
b. Perform following steps if rear chain oiler will
not be used:
Picture 26 Picture 27
2
1
9
4
5
2
8
3
Picture 28
1
5
5
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