Service manual

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1. Install #31-6028 socket head pipe plug

in hole #6 in pump cover. See Picture 3.

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 5,

27 and 28.

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 13, section 9

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

5, 26 and 29.

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 26. Supply holes not used must be

plugged with #31-6007

⁄8 -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.

Following steps provide detailed instructions on

installing fittings in different billet covers

CAUTION - Hole #3 in billet pump cover #31-6041 is for oil

pressure switch or gauge. See Picture 27. Although oil

obtained from this site may provide adequate top end

lubrication for some applications (Shovel top on Pan

bottom), S&S recommends site be used for pressure

monitoring only as oil from hole #3 does not go through

lifter screen. Under no circumstance may oil return line

be routed to hole #3.

Steps below are typical for year groups shown.

a. 1936-1991 using pump cover #31-6041

1. Install 90° elbow fitting #31-6008 in hole

#2 in top of pump cover or hole #4 in

bottom of cover. See Picture 27.

2. Install hose fitting #31-6009 in elbow

fitting installed in step a.

3. Install

⁄8 -27 pipe plug #31-6007 in supply

hole not used.

4. Install oil pressure switch/gauge elbow (not

supplied) or

⁄8 -27 pipe plug #31-6007 in

hole #3 in face of cover. Do not attempt to

use hole #3 for oil return line.

b. 1936-1991 using Custom Billet cover

#31-6045

1. Install 90° elbow fitting #31-6008 in hole

#4 in bottom of cover. See Picture 28.

2. Install hose fitting #31-6009 in elbow

fitting installed in step a.

c. 1992-up using cover #31-6044

1. Install 90° elbow fitting #31-6008 in hole

#9 in face of pump cover or hole #4 in

bottom of cover. See Picture 29.

Picture 29

Picture 31Picture 30