Fig. 7 - Cleaning Cylinder Block
25. Turn the holding lugs crosswise in the air box
openings and tighten the lock nuts, drawing the engine
tight against the adaptor plate.
26. To be sure the engine does not shift on or break
away from the overhaul stand, insert a 7/16"-14 x 2"
bolt, with a plain washer under the head of the bolt,
through the hole in the adaptor plate and into the pad on
the cylinder block.
Be sure the engine is securely mounted to the
overhaul stand before releasing the lifting sling.
Severe injury to personnel and destruction of
engine parts will result if the engine breaks
away from the overhaul stand.
Fig. 8 Sealing Plate Details for Pressure Testing
Place suitable jack under rotor transmission,
remove transmission mounting bolts and remove
transmission from engine.
If a core hole plug is difficult to remove, hold a 3/4" drift
against the plug and give it a few sharp blows with a
28. Remove clutch pressure plate mounting bolts and
one-pound hammer. With a I/2 " flexible handle and a
remove clutch assembly from engine flywheel.
short extension placed in the countersunk hole in the
29. Remove cylinder block sub assemblies.
plug, turn the plug slightly in the direction of tightening.
Then turn it in the opposite direction and back the plug
The procedure for removing each sub-assembly from
the cylinder block, together with disassembly,
inspection, repair and re-assembly of each, will be found
Clean the cylinder block as follows:
in the various chapters of this manual.
1. Remove the grease by agitating the cylinder block in
After stripping. the cylinder block must be thoroughly
a hot bath of commercial heavy-duty alkaline solution
cleaned and inspected.
Clean Cylinder Block
2. Wash the block in hot water or steam clean it to
remove the alkaline solution.
Scrape all gasket material from the cylinder block. Then
remove all oil gallery plugs and core hole plugs (except
3. If the water jackets are heavily scaled. proceed as
cup plugs) to allow the cleaning solution to contact the
inside of the oil and water passages. This permits more
efficient cleaning and eliminates the possibility of the
cleaning solution attacking the aluminum core hole plug