Spicer Hub Service Manual - Manual (Page 14)

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Service Instructions for HS515SP, HD519SP,
HS716SQ, HD719SQ
Hub Reduction Units
Description
The hub gears are driven by a floating sun pinion
which is splined to a drive shaft. The sun gear meets
with three planet gears mounted to the carrier which
is bolted to the hub. The ring gear is two pieces and
splined to the axle spindle, it also supports the outer
hub bearing cone. The hub is fully floating, running
on taper roller bearings secured and adjusted by a nut
with locking ring.
The unit is connected with a removable spindle bolted
to the axle casing.
Routine Maintenance
Service vehicle every 6 months, check the following:
1. General condition of nuts, bolts and axle casing.
2. Joints / oil seals for signs of leakage.
Tooling/Sealant List
Spring balance to read 25 lbs. (12 kg.)
Outer bearing cone bumper - E534
Hub guide sleeve - E535
Ring gear carrier assembly tooling - E536
Hub nut spanner - E538
Hub oil seal fitting tool - E541
Loctite No. 277 locking compound
Loctite No. 515 liquid gasket
Loctite No. 609 sealing compound
Vision O-rings and seals (flour-elastomers) -
safety hazards
Caution: Viton O-rings and seals (flouro-elas-
tomers) - safety hazards. Viton material used in
oil seals and O-rings produces a highly corrosive
acid (hydroflouric) when subjected to tempera-
tures above 315 ° C. This acid is very toxic and
should not be come in contact with. We recom-
mend the following procedure when it is neces-
sary to inspect any equipment that has been
subjected to high temperature or fire.
a. Visually inspect any gaskets or seals that
have suffered from heat; they will appear
black and sticky.
b. If this condition exists, do not handle.
c. Confirm material composition. Any flouro-
elestomer (Viton, Flourel or Tecomoflon)
should be considered dangerous but natural
rubber and nitrile are nonhazardous.
d. If flouroelastomer seals have been used, the
affected area must be decontaminated before
continuing.
e. Disposable heavy duty gloves must be worn
and the affected area decontaminated by
washing thoroughly with limewater (calcium
hydroxide solution).
f. Discard any clothing contaminated after use.
Note: Burning of discarded items is NOT RECOM-
MENDED, except in an approved incineration process
where gaseous products are treated by alkaline
scrubbing.
HS 515 SP, HD 519 SP,
HS716SQ, HD 719 SQ Models