4.4.20 Crankshaft Assembly Maintenance, Models 609-C and US636HCCD-1. (Continued)
4.4.20.3 Installation.
Ensure long end of dowel points away from side of crankshaft gear with timing
mark.
a.
Insert new dowel (Figure 4-36,
14) in new crankshaft gear (13).
b .
With height gauge, ensure long end of new dowel (14) is 0.6693 inches (17 mm)
from surface of new crankshaft gear (13).
c .
Install new crankshaft gear (13) on crankshaft assembly (5).
d .
Install six flat washers (12) and plugs (11).
e .
Install new spring pin (10) in crankshaft (5).
f .
Install seven new upper bearings (9) and coat with engine assembly grease.
g .
Install seven new lower bearings (4) in bearing caps (3) and coat with engine
assembly grease.
h.
Refer to tags and install fourteen dowels (8) in crankcase.
Remove and
discard tags.
i .
Lightly grease new stop rings (6 and 7), and install them in bearing cap (3)
and crankcase with smooth side facing bearing cap (3) and crankcase.
j .
Lightly grease crankshaft assembly (5) and using sling, carefully install
crankshaft assembly (5) in crankcase.
Identification numbers on bearing caps must correspond to and face same
direction as identification numbers stamped in crankcase.
k.
Refer to tags and lightly grease and install seven new lower bearings (4) and
bearing caps (3) in crankcase.
Remove and discard tags.
Start torque at center bearing cap.
Work from side to side with end bearing
caps torqued last.
l .
Refer to tags and install fourteen flat washers (2) and bolts (1) in bearing
c a p s ( 3 ).
Preload bolts (1) to 22 ft-lbs (30 N•m).
m.
Using angle-of-turn indicator, tighten bolts (1) to 60° first stage and 45°
second stage.
n.
Push crankshaft (5) towards front of crankcase.
Clearance can be adjusted by removing bearing cap and replacing stop ring
halves with appropriate size stop ring halves.
o .
Using feeler gauge, measure crankshaft (5) endplay.
Correct clearance is
0.0055-0.0117 inches (0.1397-0.2972 mm).
4-74
TM-10-4320-344-24
