Upright SB-80, Service & Parts Manual

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3-16 SB80 Work Platform - European
M
AINTENANCE
Section
3.14
8. Check initial rolling torque by installing a 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
5,9 Nm (52 lb.-in.) with boot seal installed or 5,2
Nm (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 4,75-5,6 Nm (42-50 lb.-in.), with
a boot seal installed, or 4,3-5,2 Nm (38-46 lb.-in.),
without a boot seal is reached. This may require
several trials of pressing the cone (13) by torqu-
ing the nut (16) and then checking the rolling
torque. Rotate hub (11) by hand as nut is being
tightened to seat bearings.
NOTE: Up to 339 Nm (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 80-90 Nm (60-70
lb.-ft.).
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 tight-
ened 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 mid-
dle 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 pri-
mary carrier assembly (22)} with planet gear
teeth in secondary carrier assembly (21). Assem-
ble 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 car-
rier assembly (22).
17. Lubricate “O” ring (27) and assemble in groove
inside cover hole, push disengage plunger (26)
into cover (28) with pointed end facing inside of
unit.
18. Assemble the thrust washer (25) with tangs
engaged 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 27-
34 Nm (20-25 lb.-ft.).
19. Assemble the disengage cover (31) with dimpled
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 13-27
Nm (10-20 lb.-ft.).
20. Invert the torque hub assembly and assemble the
coupling (1), with counterbore out, to the input
shaft (2).
21. After motor is assembled to drive or drive is
sealed at spindle, fill with lubricant to proper level
and replace all plugs.
Carrier assemblies
Do not attempt to service primary or secondary
carrier assemblies.
Sealing compound
Silastic RTV732 sealer and General Electric Sili-
mate RTV No. 1473 or RTV No. 1503 are recom-
mended 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.