SERViCE iMANUAL
Paragraph 120
NOTE:
When removing planetary unit, checi< for
shims (21) between retainer (22) and axie shaft (1).
Keep the shims together.
With planetary carrier removed from final drive as-
sembly, drive roU pins (18) into the planet pins (19)
from outside of carrier (20). Then, drive planet pins
out of carrier and remove each planet gear
(17),
bear-
ings (16), shims (15) and retainer (22). Remove roll
pins from planet pins for reassembly. Clean and in-
spect gears and bearings for excessive wear or other
damage and renew as necessary.
When reassembUng, it wiU be necessary to deter-
mine shims (15) needed for preload of planet gear
bearings (16) as foUows: Using two flat washers made
up to dimensions shown in Fig. 138, and a 1/2 x 3
Fig. 137—Exploded
1.
Axle shaft
2.
Oil seal
3.
Wear sleeve
4.
Bearing cone
5.
Bearing cup
6. Axle housing
7.
Cap screw
8. Gasket (early)
9. Bearing cup
10.
Bearing cone
11.
Ring gear
12.
Brake disc
view of final drive assembly.
13.
Dowel pin
14.
Oil seal
15.
Shim
16.
Bearing cone
17.
Planet gear
18.
Roll pin
19.
Planet pin
20.
Planetary carrier
21.
Shim
22.
Retainer
23.
Cap screw
24.
Planetary shaft
inch cap screw and nuts, proceed as foUows: Secure
cap screw in a vise with threaded end pointing up-
ward. Lubricate bearings (16) with Hy-Tran Plus oil
and position over the cap screw with bearing and
washer on each side of gear with washer flats in
alignment. Tighten nut to a torque of
10
in.-lbs.
(1.23
N*m) while rotating gear. Using a micrometer, meas-
ure distance across bearing inner races as shown in
Fig. 139. With this measurement, refer to chart in Fig.
140 for the required shims (15—Fig. 137) to be in-
stalled for correct bearing preload. Keep each shim
pack and gear together after correct shims have been
selected.
When reassembling, install one planet gear with
bearings and its shim pack into carrier (20) and se-
cure in place with planet pin (19) and roll pin (18).
Then, place retainer (22) in carrier and instaU the
other two planet gears, bearings and their selected
shim packs.
120.
OVERHAUL REAR AXLE AND RING
GEAR. If it is necessary to remove the ring gear
(11—
Fig. 137), remove planet carrier assembly as outUned
in paragraph 119. Using a suitable puUer, remove ring
Fig. 139—Measure distance across bearing inner races
as
shown.
12.7mm
O.BOOin
50mm
2
0 in
Fig. 138—Make up two flat washers to the dimensions
shown.
TRACTORS
385
&
485
585.685
&
885
FIGURE
OBTAINED
1.692-1.698
in.
(42.98-43.13 mm)
1.699-1.705
in.
(43.15-43.31 mm)
1.706-1.712
in.
(43.33-43.48 mm)
2.113-2.117 in.
(53.66-53.76 mm)
2.118-2.122 in.
(53.79-53.89 mm)
2.123-2.127 in.
(53.91-54.02 mm)
SHIMS
REQUIRED
0.056 in.
(1.42 mm)
0.049 in.
(1.24 mm)
0.042 in.
(1.07 mm)
0.056 in.
(1.42 mm)
0.049 in.
(1.24 mm)
0.042 in.
(1.07 mm)
Fig. 140—Chart used to determine thickness of shims
needed for pianet gear bearings. Refer to
text.
79
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