Woods BATWING BW20.50QE, Operator'S Manual

Page: 23 / 105

Dealer Service 23
MAN1279 (15/04/2019)
SPLITTER GEARBOX REPAIR
(Figure 14)
Removal from Cutter
1. Disconnect and remove all drivelines from gearbox.
2. Remove the four cap screw and lock washers that secure gearbox to
cutter, and remove gearbox.
NOTE: Gearbox is heavy: do not attempt to move it without mechanical
assistance.
Disassembly
Center Shaft
1. Remove plug from side of gearbox and pour out the gear oil.
2. Remove seal (6, to be replaced) from the front and rear of the center
shaft (5).
3. Remove front cap (4) and gaskets (8, 9, 10) from the front and rear of the
center shaft (5).
4. Support gearbox in a hand press and push on the rear of the center shaft.
5. Remove bearing cones (7), and gear (18) from center shaft (5).
6. Remove bearing cups (7) from housing and cap using a punch and
hammer.
Side Shaft
7. Remove seal (12, to be replaced) from the output shaft (13).
8. Remove 8 cap screws (3) and side shaft assembly.
9. Remove cotter pin (21), bearing adjustment nut (20), and gear (19).
10. Support side shaft assembly in hand press. Press shaft (13) through the
cap (11) from the threaded end of the shaft.
11. Repeat steps 10 through 12 for opposite side shaft.
Inspect Components
12. Inspect gears for broken teeth and wear. Some wear is normal and will
show on the loaded side of the teeth. Forged gear surfaces are rough
when new. Check that wear pattern is smooth.
13. Inspect shafts for grooves, nicks, or bumps in the areas where seals seat.
Resurface any damage with emery cloth or replace shaft.
14. Inspect housing and caps for cracks or other damage.
Assembly
1. Clean housing, pay specific attention to areas where gaskets are
installed.
2. Wash housing and all components thoroughly.
3. Select a clean work area to assemble gearbox.
4. Replace all seals, bearings, and gaskets.
5. All parts must be clean and lightly oiled before assembly.
Side Shaft
6. Insert bearing cups (7) in hub cap (11) using a round tube of the same
size diameter and a hand press.
7. Press bearing cone (7) on to output shaft (13), slide output shaft (13)
through hub cap (11) and press bearing cone (7) on to output shaft (13).
8. Slide gear (19) over output shaft (13) and secure with nut (20) and cotter
pin (21).
9. Check end play of shaft by moving it in and out. If end play is more than
0.305 mm (0.012 in.), tighten nut (20). Repeat process until end play is
less than 0.305 mm (0.012 in).
10. Check rotational torque. Torque should be less than 2.2 lbs-inch gear.
11. Place seal (12) over shaft and press into housing using a tube of the
same diameter. Seal should be flush with housing when properly
installed.
12. Repeat steps 6 through 10 for opposite side shaft.
Center Shaft
13. Insert bearing cups (7) in housing and front cap (4) using a round tube of
the same size diameter and a hand press.
14. Press spacer (14), gear (18), shims (15, 16, 17) and bearing cones (7) on
to input shaft (5).
15. Slide input shaft (5) through housing and install gaskets (8, 9, 10) and
cap (4).
16. Check end play of shaft by moving it in and out. If end play is more than
0.305 mm (0.012 in.), remove a gasket (8, 9, or 10). Repeat process until
end play is less than 0.305 mm (0.012 in).
17. Check rotational torque. Torque should be less than 2.2 lbs-inch gear.
18. Check gear backlash, backlash should be between 0.15 and 0.406 mm
(0.006 and 0.016 in). Adjust the backlash by adding or removing shims
(15, 16, 17) from the input shaft (5).
19. Place seal (6) over shaft and press into housing using a tube of the same
diameter. Seal should be flush with housing when properly installed.
Repeat process for opposite end shaft
Gearbox Inspection
1. Check gearbox for leaks by: plugging all holes except one, applying .275
bar (4 psi) of compressed air, and immersing gearbox in water. Verify
gearbox does not leak.
NOTE: Excessive air pressure will damage seals.
2. Remove gearbox from water and dry off.
3. Remove upper plug on right side of housing. Add SAE 80W or 90W EP
oil until it runs out side level hole. Replace plug.
4. Install breather (24) in top cover.
Gearbox Installation
NOTE: Gearbox is heavy: do not attempt to move it without mechanical assis-
tance.
1. Place gearbox on cutter and secure into position using four cap screws
and lock washers.
2. Torque hardware to 406.75 N-m (300 lbs-ft).
3. Attach all drivelines to gearbox.
4. Install all shields.