Reassembly - MTD P90 series Shop Manual

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.
Arrow
Figure 10.20
Figure 10.21
4.
NOTE: If the piston and connecting rod were separated,
Hole
NOTE: The arrow on the piston must point towards the
Tap piston with
NOTE: Make sure the crank pin is at BDC (bottom dead
hammer handle
NOTE: The connecting rod and the rod cap should have
Crankshaft, piston and connecting rod
Install the piston by:
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.
push rod cavity.
4d. Tap the piston through the ring compressor into
the cylinder using a wooden hammer handle.
See Figure 10.21.
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).
alignment marks so that the cap will be properly
orientated to the rod.
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