(7)
Remove the engine and pump assembly from the water distributor (para.122).
(8)
Remove the timing gear cover (para.131b).
(9)
Remove the oil pan and oil pump assembly (para. 133b).
(10)
Remove the water pump and rear panel;(para. 125).
(11)
Remove the pistons and crankshaft assemblies (para. 134b).
(12)
Remove the engine cylinder block and valve assembly (para. 137b).
(13)
Lift the tappets toward the top of the engine and slide the camshaft and gear from the crankcase.
(14)
Remove the tappets from the inside of the crankcase.
c. Disassembly.
(1) Remove the capscrews (7, fig. 38),lockwashers (6), and camshaft gear(5) from the camshaft (1).
(3) Remove the camshaft thrust plug (3,fig. 38) and spring (2) from the camshaft.
(4) Remove the tappet screw (14, fig. 41) from the tappet (13).
d. Cleaning, Inspection, and Repair.
(1) Clean all parts in an approved cleaning solvent and dry thoroughly with compressed air.
(2) Inspect the camshaft for alignment, scoring and roughness on the cams and journal. Repair or
replace the camshaft as necessary.
(3) Measure the camshaft journals and cambores in the crankcase. If the difference in diameter
exceeds 0.0065 of an inch, measure a new camshaft and again note the difference between the
new camshaft and journals. If the differences in diameters still exceeds 9.9965 of an inch, replace
the crank-case. If the difference in diameter is less than 0.001 of an inch, ream and hone the
crankcase bores.
(4) Inspect the tappets. Replace if they show signs of wear. Replace a defective or worn adjusting
screw.
e. Reassembly.
(1) Install the tappet screw (14, fig. 41) in the tappet (13).
(2) Install the spring (2, fig. 38) and cam-shaft thrust plug (3) in the camshaft(1).
(3) Position the expansion plug (5, fig. 31)in the engine crankcase.
(4) Position the camshaft gear (5, fig. 38)on the camshaft (1) and secure with the lockwashers (6)
and capscrews (7).
f. Installation.
(1) Position the tappets in the engine crankcase.
(2) Position the camshaft assembly in the crankcase and align.
(3) Install the cylinder blocks and valve assembly (para. 137g).
(4) Install the piston and crankshaft assemblies (para. 134f). Align the matching
marks
on
the
camshaft gear with the matching marks on the crank-shaft gear.
(5) Install the oil pan and oil pump assembly (para. 133f).
(6) Install the water pump and rear panel(para. 127).
(7) Install the timing gear cover (para.131e).
(8) Install the engine and pump assembly on the water distributor (para. 123).
(9) Install the cylinder heads (para.
(10) Install the flywheel and flywheel shrouding (para. 68).
(11) Install the cylinder shrouding (para.68).
(12) Install the manifolds (para. 106f).
(13) Install the canopy (para. 68).
140. Engine Crankshaft Assembly
a. Description. The engine crankcase is a one-piece casting, machined at the top and fitted with studs to
mount the cylinder blocks. The camshaft bores are honed and are bearing surfaces for the camshaft.
b. Removal.
(1) Remove the canopy (para. 68).
(2) Remove the governor (para. 76b).
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