S&S Cycle HVHP Oil Pump Kits for Big Twin User Manual

Page 6

1- Disassemble, clean, and inspect oil pump.
2- Inspect gaskets for loose bits of material that could dislodge and block oil passages.
3- Lightly oil relief plunger, check ball, springs, and assemble into their respective positions in the body, leaving check ball cap loose for

priming purposes in later steps.

4- For installation of pump with engine on work bench. See Step D.
5- For installation of pump with engine in frame using existing pump drive shaft. See Step E.

D- Installation of pump. (Engine out of frame)

1- Assemble pump back into the configuration in which it was received.

NOTE: A dab of Hylomar or other thin gasket sealer in corners of gasket may be used to hold gasket in place if care is taken to avoid critical areas such as
oil passages and interior of oil pump. Otherwise, gaskets should be installed dry.

Gasket sealant may interfere with engine lubrication if allowed to enter oil pump or passages machined in crankcase. Damage related to
improper use of gasket sealant will not be covered under warranty.

2- Position pump body gasket onto crankcase with a dab of sealer.
3- Apply engine oil that is going to be used in the engine to oil pump gears, driveshaft and driveshaft bushing in crankcase.
4- Install oil pump in crankcase in normal fashion placing pump drive gear over driveshaft as shaft is passed through bushing and into

crankcase gear compartment. Slide pump assembly into place and install top two mounting bolts and washers loosely.

5- Turn pump to align keyway in shaft and drive gear. Install the driveshaft key and snap ring inside the gearcase.

NOTE: Insure that drive shaft key and snap ring are installed properly. If snap ring is installed incorrectly, or damaged, it may allow the drive shaft key to
come out. See Picture 6 below.

Loss of oil pump drive gear snap ring or key will result in disengagement of oil pump causing loss of oil pressure and possible engine damage.

6- Proceed to Step F.

E- Installation of pump. (Engine in frame.)

With engine in frame, the pump driveshaft cannot be removed. The HVHP pump can be installed without removing the driveshaft from the
crankcases. The existing driveshaft in the cases will work with the HVHP pump.

CAUTION

Picture 6