Piston And Pin Replacement; Engine Reassembly - Toro Groundsmaster 300 Series Service Manual

Piston and Pin Replacement (Fig. 76)
To remove a piston from its connecting rod, use the
piston pin tool (see Special Tools section) to press the
pin from the connecting rod.
IMPORTANT: Do not attempt to remove the piston
pins by driving them out with a hammer. A stuck
piston pin, requiring excessive pressure to remove,
should be replaced. 1100 - 3300 lbs (500 - 1500 Kg)
pressure is standard force needed to remove the
piston pin.
1. Press the piston pin from the connecting rod as
described above.
2. Use a micrometer and bore gauge to measure the
clearance between the piston and pin. If the clearance
exceeds 0.0031 inch (0.08 mm) the piston and/or pin
must be replaced.

Engine Reassembly

The engine should be reassembled in the order given
in this section. The following general precautions should
be observed when reassembling the engine.
1. Clean each part carefully. Pay particular attention to
oil holes, bearing surfaces and rotating parts.
2. Before assembly apply engine oil to all sliding and
rotating parts such as bearings and cylinder inner walls.
®
Groundsmaster 300 Series
3. Replace all gaskets, packings, and oil seals with new
ones. Reuse of these parts is not acceptable.
4. Apply sealant to gaskets and threads.
5. Tighten all fasteners to the proper torque as outlined
in the torque specifications.
6. Check clearances and end plays when installing.
Page 4 - 59
Figure 76
Piston pin removal tool
Cylinder Block Overhaul