Upright SB60 Service & Parts Manual page 28

Section
3.10
FRONT
1. Motor
2. Gasket
3. Coupler
4. Torque Hub
Figure 3-14: Torque Hub Assembly
DISASSEMBLY OF TORQUE HUB
(REFER TO FIG. 3-15)
1. Slide the coupling (1) from splines on input shaft (2).
2. Position the assembly upright on face of spindle (3).
3. Remove the disengage cover (31) if necessary.
4. Remove eight bolts (29) and the large cover (28) from
the unit. The thrust washer (25) and the disengage
plunger (26) usually remain attached to the large cover
(28) when it is removed. Remove thrust washer (25),
disengage plunger (26) and "O" ring (27) from the
large cover (28).
5. Remove primary sun gear (24) from end of input shaft (2).
6. Remove the primary carrier assembly (22).
7. Remove the secondary carrier assembly (21).
8. Remove the input shaft (2) from spindle (3). Remove
the retaining rings (17), washers (18), and disengage
spring (19) from input shaft (2) only if replacement is
required.
9. One tab of lock washer (15) will be engaged in slot
of bearing nut (16); bend back to release. Remove the
bearing nut (16), lock washer (15) and thrust washer (14).
Note: A special locknut wrench is required for the
removal of the bearing locknut. The Bearing
Locknut Tool, Bearing Cone Driver and Spindle/
Shaft Drive Tool are included in Service Kit, part
number 100254-020.
3-14
Maintenance
REAR
1
2
3
4
1
2
3
4
10. Bolt Spindle Drive Tool, (Service Kit #100254-020),
to ring gear (20). Grade 8 bolts should be used.
Drive spindle (3) from hub (11) by turning center
bolt of Spindle Drive Tool. Care should be taken to
avoid damaging splines and threads on spindle.
Note: Bearing cone (13) has been designed with a
press fit with respect to spindle (3). Considerable
force will be required to remove cone from spindle.
11. Remove Spindle Drive Tool from ring gear (20).
12. Remove the eighteen bolts (9) and washers (10)
from hub (11) and remove ring gear (20). It may be
necessary to strike ring gear (20) with a rubber
mallet to loosen from hub (11).
13. Remove the boot seal (4) and oil seal (5) and bearing
cones (6 & 13) from hub (11). Inspect bearing cups
(7 & 12) in position and remove only if replacement
is required.
ASSEMBLY OF TORQUE HUB
1. Press new bearing cups (7 & 12) in each side of the
hub (11). It is recommended that bearing cups (7 & 12)
and cones (6 & 13) be replaced in sets.
2. Assemble bearing cone (6) into cup (7) at seal end of
hub (11) and press a new seal (5) into hub (11).
Install boot seal (4) on hub (11) if unit is so equipped.
3. Position spindle (3) upright on bench. Lubricate lips
of seal (5) and lower hub (11) onto spindle (3). Hub
(11) should be centered as it is lowered over spindle
(3) to prevent seal damage.
4. Assemble bearing cone (13) over spindle (3). Press
bearing cone (13) over spindle bearing journal using
press and cylindrical Bearing Cone Driver (Service
Kit #100254-020). Press bearing cone (13) down
until rollers just touch cup (12). Take care to avoid
pressing cone (13) to far. Note: If a press is not
available, place Bearing Cone Driver tool over
splined end of spindle (3) on the edge of bear-
ing cone (13) and drive into place with hammer
or mallet. If this method is used, care must be
taken to avoid damage to bearing cone and
spindle.
5. Install thrust washer (14) with tab in keyway of
spindle and bearing nut (16). DO NOT install lock
washer (15) at this time.
6. Clean mating surfaces and apply a bead of silicone
sealant to face of hub (11) that mates with ring gear
(20). See instructions on sealant package. Hub (11)
is attached to ring gear (20) with 18 3/8-24 grade 8
hex head cap screws (9) and flat washers (10).
Torque cap screws to 52-50 lb.-ft. (70-81 Nm).
3.10
SB60 Work Platform