c.
Install key (26) in shaft (17) and install ring gear assembly (25). Press on bearings (24 and 27).
d.
Install pinion (42) in cage (35) and install bearing (41), washer (40) and nut (39). Tighten nut until bearings begin
to bind when pinion is rotated, then loosen nut just enough to allow free movement without sideplay.
e.
Install washer (38) and nut (37) and, while holding nut (39), tighten nut (37).
f.
Install shim (36) on cage (35) and position cage on case (45). See that cage fits squarely in case then, using
screws (31), seat cage into case by tightening screws evenly. Remove screws.
g.
Install new seal (34) in cup (33), then install cup, screws (31) and lockwashers (32).
h.
Install new seal (14) in plate (13). Install shaft (17) assembly in case and install shim (16) and plate (13). Secure
with screws (11) and lockwashers (12).
i.
Install new seal (21) in plate (20) and install shim (22), plate (20), screws (18) and lockwashers (19).
j.
Install key (30), flange (2), nut (29) and cotter pin (28).
k.
Install key (10) and sprocket (9). Tighten setscrew (8).
I.
Hoist the assembled gear box assembly (7) into position on frame and install shims (6), bolts (5), lockwashers (4)
and nuts (3).
m.
Connect driveshaft to flange (2) and install and connect chain (1) at sprocket (9).
4-9.2 Third Drum Assembly. (Figure 4-24)
4-9.2.1 Removal and Disassembly.
a.
Spool cable off third drum, loosen setscrew (1) and remove cable. Remove covers from third drum.
b.
Attach a hoisting device to the drum. Disconnect and remove chains (2). Loosen setscrew (3) and remove
sprocket (4) and key (5).
c.
Remove nuts (6), lockwashers (7) and screws (8). Remove retainers (9), bearings (10) and spacers (11). Lift
third drum assembly out of drawworks frame.
d.
Refer to paragraph 4-9.3.1 and remove clutch assembly (12), then remove key (13) and spacer (14).
e.
Remove screws (15), lockwashers (16) and drive ring (17).
f.
Remove screws (18), lockwashers (19), plate (20) with seal (21) and spacer (22). Remove seal (21) from plate
(20) and o-ring (23) from spacer (22).
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