S&S Cycle Big Twin Oil Pump Kits User Manual

Page 14

3. Install #31-6007

⁄

-27 pipe plug pipe

plug in return hole not used.

d. 1992-up using cover #31-6047

1. Install 90

elbow fitting #31-6008 in

hole in hole #1 in top of cover or hole
#5 in bottom of cover.

2. Install hose fitting #31-6009 in elbow

fitting installed in step 1.

3. Install

⁄

-27 pipe plug #31-6007 in

return hole not used.

3. Primary oil supply - Cover #31-6041 is only

billet cover with provision for external primary
chain oiling.

NOTE - S&S billet oil pumps have no provision for oiling
rear chain.

a. 1936-1964 models

1. Install #31-6028

⁄

-27 pipe plug in

hole #8 in top of cover.

2. Install #31-6026 adjuster screw,

#31-6035 b r a s s w a s h e r, a n d
#31-6027 lock nut into threaded
h o l e i n s i d e o f p u m p b o d y.
Bottom screw two or three times
to seat properly. See Picture 32.

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

⁄

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 #31-6041

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 32.
Bottom screw two or three times to seat
screw. Turn screw out approximately 1

⁄

turns and tighten locknut against brass
washer and oil pump body.

NOTE - Above setting should provide 1 to 1

⁄

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.

Picture 30

Picture 32

Picture 31