Cub Cadet MTD P90 Series - Manual (Page 105)

Crankshaft, piston and connecting rod
99
Reassembly
1. Clean the cylinder
1a. Remove all gasket material from all mating surfaces.
1b. Clean the cylinder and crank case cover.
2. Oil seals
2a. Install a new oil seal in the cylinder block.
2b. Install a new seal in the crank case cover.
3. Insert the crankshaft and bearing into the cylinder block.
NOTE: Pre-lube the crankshaft with clean 10W-30 motor oil.
NOTE: Use an old piece of microfiche or a seal protector to protect the oil seal lip while inserting the crank
shaft.
4. Install the piston by:
NOTE: If the piston and connecting rod were separated,
reconnect them so that the arrow on the piston
head points to the hole in the connecting rod.
See Figure 10.20.
4a. Compress the piston rings using a piston ring
compressor.
4b. Pre-lube the cylinder wall with clean 10W-30
motor oil
4c. Slide the connecting rod and piston into the cyl-
inder.
NOTE: The arrow on the piston must point towards the
push rod cavity.
4d. Tap the piston through the ring compressor into
the cylinder using a wooden hammer handle.
See Figure 10.21.
NOTE: Make sure the crank pin is at BDC (bottom dead
center) to prevent damage from the connecting
rod.
4e. Pre-lube the connecting rod with clean 10W-30
motor oil
4f. Apply a small amount of releasable thread lock-
ing compound such as Loctite® 242 (blue) to
the connecting rod bolts.
4g. Install the connecting rod cap. Tighten the cap
bolts to a torque of 177 - 212 in-lbs (20 - 24
Nm).
NOTE: The connecting rod and the rod cap should have
alignment marks so that the cap will be properly
orientated to the rod.
Figure 10.20
Arrow
Hole
Figure 10.21
Tap piston with
hammer handle