6-3. ENGINE CRANKSHAFT,
PISTON, AND CONNECTING ROD REPLACEMENT (Cont).
Difference between largest and smallest measure-
ment instep p must not exceed 0.005 in. (0.127 mm).
Replace cylinder if measurement is not within speci-
Clean and inspect bearings in accordance with
Inspect crankshaft support for cracks and other dam-
age. Replace crankshaft support if cracked or dam-
Inspect crankshaft for scoring, wear, and damaged
threads. Repair damaged threads with die and tap
threading set, Replace crankshaft if scored or worn.
Refer to Figure 6-11, Connectlng Rod Replace-
ment, for steps a and b.
Coat piston pin (18) with lubricating oil (item 12, Ap-
pendix E) and install piston (13) on connecting rod
(7) with piston pin.
Install two retaining rings (17) on ends of piston pin
Refer to Figure 6-12, Piston Rings Replace-
ment, for step c.
Apply light coat of lubricating oil (Item 12, Appen-
dix E) to two piston rings (19) and using piston ring
compressor, install piston rings on piston (13) with
beveled side up and piston ring gaps offset.
Refer to Figure 6-10, Crankshaft BearIng Re-
placement, for step d.
Apply light coat of grease (item 10, Appendix E) to
new seal (16) and install seal, retaining ring (1 5), and
bearing (14) in cylinder (1).
Refer to Figure 6-9, Piston Replacement, for
steps e and f.
Apply light coat of lubricating oil (item 12, Appen-
dix E) on cylinder (1).
Closed end of piston pin must face support
Insert piston (13) and connecting rod (7) into cylinder
(1) and guide piston into cylinder using piston ring
compressor. Push piston and connecting rod into
cylinder as far as possibie.
Refer to Figure 6-8, Crankshaft Replacement,
for steps g and h.
Position crankshaft (9) in cylinder (1) and install re-
taining ring (12).
Apply light coat of adhesive (item 2, Appendix E) to
two screws (11) and install roller and cage set (8)
and connecting rod cap (10) on crankshaft (9) with
two screws. Tighten screws gradually and evenly
while moving connecting rod cap back and forth until
it is properly alined with connecting rod (7). Torque
screws to 80-90 lb.-in. (9.04-10.17 Nm).