Installation manual

MECHANISM ASSEMBLY AND DRIVE SIDE CRANK ARM SERVICE

WARNING:

Always wear your safety glasses and gloves when servicing the HammerSchmidt. Some parts of the HammerSchmidt are spring

loaded and can pop out suddenly which could lead to injury if your eyes are not properly protected.

Make sure you have a clean work area, clean rags, and the necessary parts and tools to service your HammerSchmidt.

IMPORTANT:

When performing service on your HammerSchmidt, the following parts are not re-usable and must be replaced during service:

Planet Retaining Rings and Carrier Seal.

Parts and tools needed for service:

• Safetyglasses

• Gloves

• HammerSchmidtBearingRemovalTool

• 5,6,8mmhexwrenches

• 24mmwrench

• Smallatheadscrewdriver

• Pick

• Cleanrags

• Adjustabletorquewrenchupto25N·m(217in-lb)

• HammerSchmidtgreasekit*

• Smallgreasebrush(optional)

* You must use the grease supplied in the HammerSchmidt grease kit unless otherwise

speciﬁed. Using any other grease will void your warranty.

M E C H A N I S M A S S E M B L Y A N D D R I V E

SIDE CRANK ARM REMOVAL

Shift the HammerSchmidt into 1:1 by pressing the large shifter

paddle. Remove the chain according to the chain manufacturer’s

instructions.

Using an 8 mm hex wrench, turn the self-extracting crank bolt

counter-clockwise to remove the HammerSchmidt mechanism

assembly and drive side crank arm.

F U N C T I O N A L I N S P E C T I O N O F T H E

H A M M E R S C H M I D T M E C H A N I S M

A S S E M B L Y

With the mechanism assembly separated from the collar plate

inspect the HammerSchmidt visually and by feel for wear and

contamination. Look inside the sun gear for dirt and debris. It

may be appropriate to wipe this area with a clean, dry rag and

re-grease periodically.

Spin the ring gear counter-clockwise and feel for increased or

unusual drag or play in the assembly as this may indicate the

need for service.

TECHNICAL SERVICE