11-59
5540F/YB5515 SERVICE MANUAL STRUCTURALS
18. Using a suitable puller, remove bearing cup14 from
housing 25.
19. Using a suitable puller, remove bearing cup 14 from
cover 22.
Inspection
Clean all parts. See Section 1. Make sure the breather (29,
Figure 11-127) is clean. Make a careful inspection of all
parts, including gears, shafts and bearings.
Replace all seals and gaskets.
Assembly
1. If removed, install a new bearing cup 14 into housing 25.
2. Install new wiper 3 into housing 25.
3. Install pinion shaft 1 into housing 25 through seal 3 Be
careful not to damage the seal.
NOTE: Before installing any bearing cone, pack the
bearing with a Lithium base, E.P. No. 2 bearing
grease.
4. Pack both bearing cones 6 with grease and install onto
worm 26.
5. Insert worm 26 into housing 25.
6. Pack first bearing cone 15 with grease and install onto
pinion shaft 1. Install firsts pacer 16.
7. Using two keys 2, install worm gear 17 onto pinion shaft
1.
8. Install second spacer 16 and second bearing cone (15)
onto pinion shaft 1. Be sure bearing cones are packed
with grease before assembly.
9. Install seal 8 into end cap 12. Install bearing cup 5.
Install o-ring 7. Lubricate the seal and o-ring with grease
before assembly.
10. Install seal 8 into motor cap 27. Install o-ring 7. Lubricate
seal and o-ring with grease before assembly.
11. Insert the end of worm 25 into end motor cap12. Fasten
end motor cap 12 to housing 25 with socket head
capscrews 13.
12. Align the gear teeth of worm 25 with the teeth of worm
gear 17.
13. If the original bearing cups and cones were installed in
the end caps and onto the worm, the existing shims 9
through 11 may be installed between housing 25 and
end cap 27. Install the shims and end cap 27. Attach end
cap 27 with capscrews 28.
If new bearings were installed, proper bearing pre-load
must be determined before final installation of the end
cap 27.
a. Install end cap 27 without shims installed.
b. Using a dial indicator, measure the amount of axial
movement of the worm. Proper axial movement
must be between -0.001 to + 0.002 inches (-0.025 to
+0.05 mm).Determine the amount of shims required
to acquire the proper axial movement. Then, install
the shims between housing 25 and end cap 27.
Fasten with capscrews 28.
14. If the original bearings were installed on pinion shaft 1,
then the existing shims 19 through 21may be installed
between cover 22 and housing 25. Install shims and
fasten cover 22with capscrews 23.
If new bearings were installed, proper bearing pre-load
must be determined before final installation of the cover.
a. Install the cover without shims.
b. Using a dial indicator, measure the amount of axial
movement of the pinion shaft.Proper axial
movement must be between -0.003 to -0.005 inches
(-0.076 to -0.127 mm). Determine the amount of
shims required to acquire the proper axial
movement. Then, install the shims between housing
25 and cover 22.Fasten with capscrews 23.
15. Fill the housing with a Lithium base E.P. No. 2bearing
grease through the grease fitting on the cover. See
Section 3, Preventive Maintenance.
Installation
1. Install the gearbox in reverse order of removal.
2. When installing the swing motor, use a new gasket.
3. Align the pinion gear with the swing gear following
instructions.
Swing Gearbox Repair (Braden Gearbox)
Removal
1. Use a hoist and blocks to hold the boom in position and
prevent the mast from rotating.
2. Tag and disconnect the hydraulic hoses from the swing
gearbox. Plug the hoses and cap the hydraulic fittings.
3. Provide support for the gearbox and remove the four
bolts which fasten the gearbox to the frame. Remove the
gear box and eccentric ring from beneath the machine.
Disassembly
1. Clean the outside of the gearbox before disassembly.
2. Remove hydraulic motor 13 (Figure 11-128) and gasket
29 from the gearbox.
3. Remove drain plug 15 and drain all lubricating oil into a
suitable container. Install the drain plug.
Reference Only
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