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DEALER SERVICE
Disassemble Gearbox
(Figure 16)
1. Remove vent plug (24) of gearbox and pour out remaining
gear oil.
2. Support housing in vise with the input shaft in a horizontal
position.
3. Remove the six cap screws (12) and washers (11) from the
input cap.
4. Tap shaft with a hammer side to side to loosen the cap
from the housing. Once the cap is loose, pry the cap out of
the housing. Please note that the cap, cap bearing, seal,
shaft and gear will all come out with the cap.
5. With this cap, shaft and gear assembly removed from the
gearbox, remove retaining ring (22).
6. Remove oil seal (6) from input cap.
7. Support cap and press shaft through the gear. Once
the shaft and gear are separated from the cap, remove
retaining ring (7) from cap. Cap bearing can now be
removed.
8. Remove input gaskets from the housing face and cap.
9. Support housing in a vise with the output shaft in a
horizontal position.
10. With the hub/stump jumper/crossbar, castle nut, cotter
pin already removed, remove the four cap screws (12), lock
washers (11) and output cap (16).
11. Remove output gaskets (17) and (18).
12. Push output shaft and pinion (20) down and remove ball
bearing (3), output bearing spacer (10), retaining ring (22),
shim (19) and remove output shaft and pinion (20).
13. Inspect gears for broken teeth and wear. Some wear is
normal and will show on loaded side. Forged gear surfaces
are rough when new. Check that wear pattern is smooth.
14. Inspect vertical and horizontal shafts for grooves, nicks, or
bumps in the areas where the seals seat. Resurface any
damage with emery cloth.
15. Inspect housing and caps for cracks or other damage.
26
Reassemble Gearbox
(Figure 16)
1. Clean housing, paying specific attention to areas where
gaskets will be installed.
2. Wash housing and all components thoroughly. Select
a clean area for gearbox assembly. Replace all seals,
bearings, and gaskets. All parts must be clean and lightly
oiled before reassembling.
3. Slide ball bearing (3) on to output shaft and pinion (20).
Place against gear and secure with retaining ring (22).
4. Install shim (19) in output housing bore. Push output shaft
and pinion (20), ball bearing (3) and retaining ring (22) into
housing until ball bearing (3) seats flat against the shim in
housing socket.
5. Insert output bearing spacer (10) and ball bearing (3) over
output shaft until it seats against inside roller bearing (3).
6. Secure output cap (16) with the new output seal (13)
installed to bottom of gearbox housing using the four
10mm X 1.5 X 25 cap screws (12) and lock washers (11).
NOTE: Be sure output gaskets (17 and 18) are in place.
Use RTV silicone on gaskets for a leak free seal. Apply
grease to output seal (13) lip for easy installation.
7. Place ball bearing (21) at back of housing and press in
socket using a round tube of the correct diameter and a
hand press until fully seated.
8. Press new ball bearing (3) into cap (2) socket by using a
round tube of the correct diameter and hand press until
fully seated.
9. Install retaining ring (7) into input cap (2) to retain the
bearing (3).
10. Install retaining ring (23) onto input shaft (4) in the groove
next to the spline. Press shaft (4) through the bearing (3)
that is installed in input cap (2) until retaining ring is fully
seated against bearing (3).
11. Install input gear (23) onto input shaft (4) making sure it is
seated against bearing (3). Install retaining ring (22) over
the spline on input shaft (4) and make sure it is fully seated
against the gear face.
12. Install input shaft, cap, and gear assembly into housing
using one each input gasket (8) and one each input gasket
(9). Using a rubber hammer, tap the end of the input shaft
until the cap face is fully seated against the gaskets and
housing face.
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