S&S Cycle HVHP Oil Pump Kits for Big Twin - Manual (Page 8)

8
2- Engine in frame.
Oil tank above the oil pump.
a- Connect oil lines as required. (See Appendix on oil line routing if necessary.) Fill oil tank.
b- Remove cap, spring, and check ball from oil pump.
c- Rotate pump drive shaft gear (top of gear is moved towards right side of engine) until air-free oil can be seen exiting from check ball cavity.
d- When pump is primed, replace check ball, spring, and cap.
NOTE: This procedure can be performed even if engine is fully assembled. Pump rotation will be achieved by removing spark plugs and cranking engine
over with kick or electric starter.
3- Engine in frame. Oil tank below the oil pump.
a- Connect oil lines as required. (See Appendix on oil line routing if necessary.) Fill oil tank.
b- Remove cap, spring, and check ball from oil pump.
c- Fill check ball cavity with oil and observe the rate at which it drains away. Re-fill cavity as necessary until the slowest drain down rate
is achieved.
d- When drain down rate has stabilized, fill check ball cavity one last time, then install check ball, spring, and cap.
NOTE: This procedure can be performed on assembled engine if oil pump happens to lose prime after an oil change.
Air lock or cavitation can occur if trapped air is not released from oil pump after installation. It can occur with new pump as well as used
pump that has been removed from engine, and interferes with oil circulation. It is installer's responsibility to remove trapped air by
priming pump prior to running engine and to confirm correct pump operation with engine running.
H- Assemble gearcase.
1- Install the previously removed pinion shaft components according to the standard procedure for the appropriate year group. Year groups
applicable to the pinion shaft components are as follows:
a- 1990-'92 OEM Harley-Davidson®
b- 1993-'99 OEM Harley-Davidson
c- All S&S 1992-up style crankcase for big twin.
NOTE: S&S® supplies only the 1954-'89 style pinion shaft oil pump drive gear in its production engines. This gear must be installed with the chamfer
towards the shoulder on pinion shaft.
Installing pinion shaft oil pump drive gear backwards on pinion shaft may cause stress riser resulting in eventual failure of shaft. Damage
caused by incorrect installation of gear or other parts is not covered under warranty.
I- Initial startup and post-operation checks. All years.
1- After pump has been installed and primed, oil lines connected in correct manner (See Appendix on page 7.) and oil tank filled to correct
level, confirm oil circulation with oil pressure gauge and by removing cap from oil tank and observing oil return to tank. If oil is not seen
returning to tank, S&S recommends removing return line from tank and placing end in drain pan to confirm oil circulation.
NOTE: Engine oil circulates under pressure. Areas exposed to escaping oil should be covered with rags and engine turned off immediately after oil
circulation is confirmed to minimize oil loss.
Oil on tires or brakes can cause loss of control of motorcycle resulting in serious injury to operator and others.
2- After confirming oil circulation, run engine for several minutes and check for leaks.
NOTES:
•
Low oil pressure is often blamed on oil pump when actual cause is worn bushings or another internal component. A new oil pump will not correct
problems caused by worn parts and excessive operating clearances. If low oil pressure exists after new oil pump is installed, check clearances and other
possible causes such as installation of different gear cover, tappet guides, etc.
•
Sudden clatter in previously quiet hydraulic lifter may indicate lifter failure OR excessively low oil pressure and should be investigated. It is not unusual for
hydraulic lifters to clatter when a new or recently rebuilt engine is first started, but noise should disappear as lifters pump up. Time required depends on
several factors including brand of lifter, oil viscosity and temperature.
CAUTION
CAUTION
WARNING