Cub Cadet MTD 70 Series - Manual (Page 123)

Crankshaft, piston and connecting rod
117
Reassembly
1. Clean the cylinder
1a. Remove all gasket material from all mating sur-
faces.
1b. Clean the cylinder and sump.
2. Oil seals
2a. Install a new oil seal in the cylinder block.
NOTE: A piece of 1” schedule 40 PVC pipe can be used
as a seal driver.
2b. Install a new seal in the sump. See Figure
10.22.
NOTE: Use a Troy-Bilt tiller seal service tool # TWX-4006
to install the sump oil seal.
3. Insert the crankshaft into the cylinder block bearing.
NOTE: Pre-lube the crank shaft with clean 10W-30 motor
oil or engine assembly lube.
NOTE: Use an old piece of microfiche or a seal protector
to protect the oil seal lip while inserting the crank
shaft. See Figure 10.23.
4. Install the piston by:
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. See Figure 10.24.
Figure 10.22
Troy-Bilt seal driver
Figure 10.23
Seal
protector
Figure 10.24
arrow
push rod
cavity