Upright SB60 Service & Parts Manual page 29

3.10
7. Place Spindle Drive Tool (Service Kit #100254-020),
over spindle (3) and bolt or pin to ring gear (20).
Make sure center bolt of Drive Tool is not touching
spindle and is prevented from rotating by jam nuts
provided on tool.
8. Check initial rolling torque by installing a lb.-in.
torque wrench (arm or dial type) on center nut of
Spindle Drive Tool and turning hub (11) slowly and
steadily with the torque wrench. Note mean torque.
An initial bearing torque of greater than 52 lb.-in.
with boot seal installed or 46 lb.-in. without boot
seal means that the cone (13) was pressed on to
tightly in step 4. In this case, back off bearing cone
(13) by pressing spindle (3) out of cone (13) until
initial preload is relieved. See step 10 of disassembly
procedure.
9. Torque bearing nut (16) with Bearing Locknut Tool
(Service Kit #100254-020) until a bearing rolling
torque of 42-50 lb.-in., with a boot seal installed, or
38-46 lb.-in., without a boot seal is reached. This
may require several trials of pressing the cone (13)
by torquing the nut (16) and then checking the
rolling torque. Rotate hub (11) by hand as nut is
being tightened in order to seat bearings.
NOTE: Up to 250 lb.-ft. of torque may have to be
applied to bearing nut (16) in order to press
cone (13) into position.
10. Remove bearing nut (16) and install lock washer
(15). Replace bearing nut (16).
11. Re-torque bearing nut (16) to 60-70 lb.-ft. (80-90 Nm.)
12. Secure bearing nut (16) by bending a lock washer
(15) tab into one of four bearing nut slots. If no tab
aligns with a slot, the nut may be tightened until one
of the slots aligns with a lock washer tab.
13. Assemble a washer (18), spring (19), a second
washer (18), and a retaining ring (17) in the middle
grooves of input shaft (2). Install a second retaining
ring (17) in groove near small end of input shaft (2).
14. Assemble the splined end of the input shaft (2) down
into spindle (3).
15. Assemble the secondary carrier assembly (21) to
spindle (3) at splines.
16. Assemble the primary carrier assembly (22) into the
ring gear (20). It will be necessary to rotate carrier
to align secondary sun gear {part of primary carrier
assembly (22)} with planet gear teeth in secondary
carrier assembly (21). Assemble primary sun gear
(24) over input shaft (2). Rotate primary sun gear
(24) to align input shaft (2) to gear splines and gear
teeth in primary carrier assembly (22).
SB60 Work Platform
Maintenance
17. Lubricate "O" ring (27) and assemble in groove inside
18. Assemble the thrust washer (25) with tangs engaged
19. Assemble the disengage cover (31) with dimpled
20. Invert the torque hub assembly and assemble the
21. After motor is assembled to drive or drive is sealed
CARRIER ASSEMBLIES
SEALING COMPOUND
cover hole, push disengage plunger (26) into cover
(28) with pointed end facing inside of unit.
with cover (28). NOTE: A small amount of grease
applied to the back side of thrust washer (25)
will hold washer in place. Apply a bead of silicone
sealant to end of face of ring gear (20). Assemble
cover (28) aligning holes of cover and ring gear.
Assemble the eight 5/16-18 x 1 inch hex head bolts
(29). Torque bolts to 20-25 lb.-ft. (27-34 Nm).
center protruding out if wheel is to be used to drive
the vehicle. Assemble and torque the two 5/16-18 x
1/2 inch bolts (32). Torque bolts to 10-20 lb.-ft.
(13-27 Nm).
coupling (1), with counterbore out, to the input shaft
(2).
at spindle, fill with lubricant to proper level and
replace all plugs.
Do not attempt to to service primary or secondary
carrier assemblies.
Silastic RTV732 sealer and General Electric Silimate
RTV No. 1473 or RTV No. 1503 are currently
recomended for sealing gasket surfaces. Sealant
should be applied in a continuous bead, which
should be centered on the surface to be sealed but
should move to the inside of the hole at each bolt
hole location.
Section
3.10
3-15