Piston And Connecting Rod - Toro Workman 3000 Series Service Manual

Piston and Connecting Rod

1. Remove the cylinder head (see Cylinder Head Re­
moval in the Cylinder Head Overhaul section of this
chapter).
2. Remove the oil pan and gasket.
3. Remove the oil screen
NOTE: Before removing the pistons, mark the number
of the cylinder onto the top of each piston and on the
side face of each connecting rod (on the large end).
When the piston and connecting rod is removed be
careful to prevent damage to the piston or bearing
surfaces.
4. Use a ridge removing tool to remove the ring ridge
from each cylinders. This will prevent damage to the
rings and pistons.
5. Remove the connecting rod end caps and bearings
(Fig 83). Keep these parts in cylinder number order so
they can be reinstalled in the same cylinder. Use a wood
block to push the pistons and connecting rods up out
from the bottom of the block. Take care not to scratch
the crankshaft pin and cylinder.
6. Check each piston for wear, signs of seizure or nicks.
Replace the piston if it is damaged.
7. Thoroughly clean the carbon deposits from the piston
and ring grooves. A ring groove cleaner, or piece of
discarded ring may be used to clean the ring grooves.
Liquid Cooled Diesel Engine
1. Piston ring No. 1
2. Piston ring No. 2
3. Oil ring
4. Piston
5. Piston pin
Page 4 - 72
Figure 83
6. Connecting rod
7. Connecting rod bearing
8. Connecting rod cap
9. Connecting rod bolt
10. Connecting rod nut
Workman 3300-D/4300-D