TM 5-4220-211-12&P
m. Remove second stage piston and piston rings (39 and 40, Fig. D-4).
(1) Remove two circlips (42, Fig. D-4).
(2) Push wrist pin (41, Fig. D-4) out of piston (39, Fig. D-4). Remove piston from connecting rod (43, Fig.
43, Fig. D-4).
(3) Remove piston rings (40, Fig. D-4) from piston (39, Fig. D-4). Note location and orientation of piston
ring for later reassembly.
n.
Remove oil pressure regulator (6, Fig. D-9).
(1) Remove two socket head bolts (10, Fig. D-9). Remove oil pressure regulator and O-ring (6 and 12, Fig.
D-9) from the third stage cylinder.
o.
Remove third stage piston and sleeve (45, Fig. D-4).
(1) Remove third stage valve head. Ref. para 4-4m.
(2) Remove third stage cooling ring (44, Fig. D-4). Remove third stage piston and sleeve (45, Fig. D4) from
third stage cylinder (47, Fig. D-4).
p.
Remove third stage upper cylinder and lower cylinder (47 and 60, Fig. D-4).
(1) Remove four nuts and washers (21 and 22, Fig. D-4).
(2) Remove third stage cylinder, O-ring, lower cylinder and gasket (47, 59, 60 and 48, Fig. D-4) from
q.
Remove third stage guide piston (49, Fig. D-4).
(1) Remove two snaps (52, Fig. D-4).
(2) Push wrist pin (51, Fig. 1) out of guide piston (49, Fig. D-4). Remove guide piston from connecting rod
(50, Fig. D-4).
r.
Remove oil pump drive cam (11, Fig. D-4).
(1) Remove three socket head bolts (16, Fig. D-4) from filter mounting (15, Fig. D-4). Remove filter
mounting (15, Fig. D-4).
(2) Remove two bolts and one tab washer (13 and 12, Fig. D-4). Remove oil pump drive cam (11, Fig. D-4)
from crankshaft (9, Fig. D-4).
s.
Remove crankshaft end housing (5, Fig. D-4).
(1) Remove six Hex head bolts and washers (1 and 2, Fig. D-4).
t.
Remove connecting rods (28, 43, and 50, Fig. D-4).
(1) Remove bearing (10, Fig. D-4) from end of crankshaft (9, Fig. D-4).
(2) Remove pinch bolt, nut and washer from counterweight (62, Fig. D-4). Remove counterweight (62, Fig.
D-4) from crankshaft.
(3) Before removing connecting rods, mark rods for sequence and orientation on crankshaft. Remove
connecting rods (28, 43, 50, Fig. D-4).
4-17.
ENGINE. Disassembly of the engine is covered in Appendix A.
4-18.
PURIFIER CHAMBER. The purifier chamber may be disassembled as follows:
a.
Remove purifier chamber from frame (Ref. para 4-10.)
b.
Remove top plug (1, Fig. D-13) from purifier chamber cylinder (2, Fig. D-13).
c. Remove bottom plug (3, Fig. D-13) from purifier chamber cylinder (2, Fig. D-13).
d. Remove O-rings and back up rings (4 and 5, Fig. D-13) from top and bottom plugs (1 and 3, Fig. D-13).
4-19.
DELETED.
Change 3 4-19