Cub Cadet Yanmar 3TNV72 - Manual (Page 141)

ENGINE
6-42 TNV IDI Service Manual
Cylinder Block
Removal of Gear Case
Note: The camshaft must be removed before
the gear case can be removed. See
Removal of Camshaft on page 6-41.
1. Remove bolts (Figure 6-49, (4)).
Note: It is not necessary to remove the fuel
injection pump from the gear case to
remove the gear case. If the fuel injection
pump does not need to be repaired,
leave it mounted to the timing gear case.
See Removal of Fuel Injection Pump on
page 7-13.
2. Remove the gear case (Figure 6-49, (1)) from
the cylinder block.
3. Inspect and measure the camshaft bushing.
See Camshaft on page 6-7 for service limits. If
damaged or worn beyond service limits, remove
the camshaft bushing (Figure 6-49, (3)).
4. Remove O-rings (Figure 6-49, (2)).
Figure 6-49
Disassembly of Crankshaft and
Piston Components
Removal of Pistons
IMPORTANT
Engines with high operating hours may
have a ridge near the top of the cylinders
that will catch the piston rings and make it
impossible to remove the pistons. Use a
suitable ridge reamer to remove ridges and
carbon prior to removing pistons.
Note: Pistons can fall from cylinder block if
engine is inverted. Rotate the engine so
the connecting rods are horizontal before
removing the connecting rod caps.
0002187
(3)
(1)
(4)
(2)
CAUTION
Keep the piston pin parts, piston
assemblies, and connecting rod
assemblies together to be returned to
the same position during the
reassembly process. Label the parts
using an appropriate method.
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