Section XXIII. CRANE ENGINE LOCK
The crane engine block is a solid, one-piece iron-
alloy casting. It houses the crankshaft, camshaft,
connecting rods, pistons and valves. The block has full
length water jacket around the cylinders and has water
passages around the valves for cooling. Drilled oil
passages carry oil under pressure to all bearings and
moving parts requiring lubrication.
(1) Remove the carburetor, distributor,
Figure 208. Crane engine block, exploded view.
Inspect the engine block for breaks, cracks,
or other damage. Replace a cracked or broken engine
block as necessary.
Inspect the cylinder diameter.
measure between 4.249 and 4.251 inches.
(7) Remove the engine block.
Disassembly. Disassemble the crane block
Reassembly. Reassemble the crane engine
Crane Engine Block Cleaning and Inspection
Soak the engine block in a strong caustic
Install the engine block.
solvent for 2 hours; remove and clean with live steam.
Clean water and oil passages.
Inspect for wear and damage.
Check the machined surfaces of the block
with a straight edge and feeler gauge. If the surfaces
are warped more than 0.010 inch, replace block as
Install the carburetor, distributor,
Inspect all mounting hardware for stripped or
damaged threads. Replace all defective hardware as