S&S Cycle Big Twin Oil Pump Kits User Manual

Page 12

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:
1. Install #31-6028 socket head pipe

plug in hole #6 in pump cover. See
Picture 4.

2. Install #31-6029 cap screw and #31-6035

brass washer in hole #7 in pump cover.

B. Billet Cover

S&S manufactures four different billet oil pump
covers. Most obvious differences are in mounting
bolt pattern and oil line fitting placement.

Pump covers #31-6041 and #31-6045 utilize
‘91-earlier bolt pattern. #31-6041 provides top
and bottom options for placement of oil supply
and return line fittings as well as provision for
oil pressure gauge/switch and primary oil supply
fitting. S&S Custom Billet Cover #31-6045
accepts bottom mount supply and return lines only
and has no provision for primary oiling or oil
pressure monitoring. See Pictures 6, 28 and 29.

CAUTION - Custom Billet Oil Pump Cover #31-6045
is not recommended for Dynas and other models with
oil tank mounted below transmission because of
possibility of cavitation or "air lock". Cavitation can
prevent adequate oil circulation resulting in extensive
engine damage. See page 17-18 for additional
information on preventing cavitation.

Billet pump covers #31-6044 and #31-6047
utilize ‘92-up mounting bolt pattern. #31-6044
provides bottom location for placement of oil
line fittings as well as central location for ‘92-up
OEM rigid return line. “Universal” cover #31-6047
supplied with most S&S Long Blocks ordered with
billet oil pump includes same features as #31-6044
as well as provision for placing oil line fittings in
top of cover. See Pictures 6, 27 and 30.

CAUTION - To avoid cavitation in ‘92-up Dynas and
other models with oil tank mounted below
transmission, oil supply line should be installed in
bottom location in all covers.

1. Oil Supply - Oil supply line fitting can be

installed at any of three locations in #31-6047
billet pump cover normally supplied with S&S
Long Blocks. See Picture 27. Supply holes
not used must be plugged with #31-6007

⁄

-27 pipe plugs.

Pump cover #31-6041 for ‘91-earlier models
provides top and bottom locations for oil supply
fitting. (See Caution below.) Custom Billet cover
#31-6045 for ‘91-earlier models provides only
bottom location. Cover #31-6044 for ‘92-up
models provides central and bottom locations
for fitting.

Picture 27

Picture 28

Picture 29