TM 5-4310-343-35
(f) Remove second stage assembly (8) from crankcase by removing screws (9), and washers (10).
(Refer to figure 6-6).
(g) Disassemble second stage in sequence of index numbers as shown in figure 6-8. If either cylinder
(18) or plunger (17) is damaged or worn, both must be replaced as they are matched parts. Place all second stage parts
in a clean container and set aside for cleaning, inspection, and overhaul if required.
(h) Remove first stage assembly (1) from crankcase by removing lock nuts (2) and washers (3) from
studs (7). (See figure 6-6).
(i) Disassemble first stage in sequence of index numbers as shown in figure 6-7.
(j) Refer to fig ure 6-6. Utilizing a suitable size bar stock, rotate crankshaft (36) until piston (29) is on top
dead center. Remove retaining rings (27) and piston pin shims (28) and press out piston pin (26) taking care not to
damage or score it.
(k) Carefully remove piston (29) and remove piston rings (4).
(l) Remove items 41 through 45 from rear of crankcase.
NOTE: Under ordinary conditions, the remaining parts (23, 24, 25, 30 through 40) should not be disassembled from the
crankcase. However, if signs of wear or scoring are evident, these parts should be disassembled. Bearings (30 and 42),
if removed, should be discarded and replaced with new parts at reassembly.
(m) Straighten tangs of screw locks (32) and remove four screws (34), locks (32) and washers (35) fr om
counterweights (33).
Remove counterweights.
Remove crankcase(43) from adjustable holding fixture, Part Number
871981 or equivalent and place crankcase, motor mounting flange up, over arms on nest of disassembly fixture,
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