Cylinder Block Overhaul; Cylinder Block Disassembly - Toro Groundsmaster 300 Series Service Manual

Cylinder Block Overhaul

This section outlines procedures for disassembly, in-
spection, repair and reassembly of the cylinder block
and its components, as outlined below:

Cylinder Block Disassembly

Camshaft Service
Injection Pump Camshaft Service
Crankshaft Bearings
Timing Gears
Connecting Rods and Bearings
Cylinders
Oversized Pistons, Cylinder Bore and Rings
Piston and Pin Replacement
Cylinder Block Disassembly
NOTE: It is assumed that the engine has been removed
from the mower, placed on an engine stand, and the
cylinder head removed.
1. Place a drain pan under the engine. Remove the oil
pan drain plug and drain the oil from the engine. Re-
move the oil filter from the oil pump body. Discard the
oil filter. Dispose of the oil in the proper manner.
2. Remove the water pump.
3. Remove the fuel injection pump from the cylinder
block body and the fuel filter.
NOTE: It is necessary to remove the tie rod cover, the
control rod, and retaining spring from the control rack
before removing the injection pump.
4. Lift the push rods out of the cylinder block.
5. Remove the valve lifters from their positions in the
cylinder block.
6. Remove the speedometer drive assembly from the
left hand side of the engine by removing the cap screw
and clamp and pulling the gear out.
7. Turn the engine upside down on the stand and
remove the oil drain pan and filter screen (spring-like
screen).
®
Groundsmaster 300 Series
8. Remove the crankshaft pulley, nut, washer, lock
washer and key.
9. Remove the gear case from the front of the motor.
NOTE: The front plate is retained to the cylinder block
by bolts that are underneath the cover. Do not attempt
to remove the plate without first removing the gear case
cover and the bolts underneath.
10. Remove the camshaft and gear by carefully backing
them out from the cylinder block.
NOTE:The speedometer drive and valve lifters must be
removed to remove the camshaft.
11. To remove the injection pump camshaft, first remove
the governor sliding shaft and governor flyweight as-
sembly. Align the hole in the injection pump camshaft
gear with the retaining bolt and washer. Remove the
washer and carefully pull the camshaft gear and bearing
from its location in the cylinder block.
12. Remove the idler gear from its shaft.
13. Remove the flywheel bolts and washers and remove
the flywheel from the crankshaft.
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