Reassembly – Cub Cadet MTD P71 Series User Manual

Page 103

Crankshaft, piston and connecting rod

Reassembly

1. Clean the cylinder

1a.

Remove all gasket material from all mating sur-
faces.

1b.

Clean the cylinder and sump.

Oil seals

2a.

Install a new oil seal in the cylinder block. See
Figure 10.24.

NOTE: A piece of 1” schedule 40 PVC pipe can be used

as a seal driver.

2b.

Install a new seal in the sump.

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 10.25.

Install the piston:

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 10.26.

Figure 10.24

Seal driver

Figure 10.25

Seal
protector

Figure 10.26

push rod

cavity