Service Manual

Table Of Contents
Page 45
Section 5
Lubrication
Lubrication Specification
The axles covered by this manual all have a hypoid
gear set in the carrier assembly that requires extreme
pressure EP type lubricant in the GL5 oil classification.
The planetary wheel end's oil and the wet disc
brakes' coolant oil, if equipped with wet disc brakes,
have a common sump with the carrier's oil. Any oil
added to the axle's common sump, whether added at
the wheel end or at the carrier center fill plug loca-
tions, must be the GL-5 type hypoid gearset oil. See
Table C for Lubricant Specification.
Brake Actuation Fluid
WARNING:
DO NOT USE DOT 3 or DOT 5 Automotive Brake
Fluid for actuating the Wet Disc Service Brakes or
f
or actua
ting the Parking/Emergency Brake, if axle is
equipped with these brakes. DOT3 and DOT5 fluids
are Glycol based fluids.
Optional service brakes are 360 mm wet disc brakes
that use petroleum based fluid for brake actuation.
An optional Parking/Emergency Brake can be
mounted at the carrier input yoke. The optional
Parking/Emergency Brake also uses petroleum
based fluid for brake actuation.
Hydraulic Fluid or Tractor Oil Universal (TOU) are
suitable oils for actuating the wet disc brake and for
actuating the Parking/Emergency Brake. Follow
vehicle OEM fluid specifications and use only fluids
specified by vehicle OEM.
!
Table C: Lubricant Cross Reference (Viscosity) and Temperature Chart
Lubricant Minimum Outside Maximum Outside
Specification Description Cross Reference Temperature Temperature
STC 05-001 Hypoid Gear Oil GL-5, S.A.E. 85W/140 +10°F (–12.2°C) - - -*
STC 05-002 Hypoid Gear Oil GL-5, S.A.E. 80W/140 –15°F (–26.1°C) - - -*
STC 05-003 Hypoid Gear Oil GL-5, S.A.E. 80W/90 –15°F (–26.1°C) - - -*
STC 05-004 Hypoid Gear Oil GL-5, S.A.E. 75W/90 –40°F (–40°C) - - -*
STC 05-005 Hypoid Gear Oil GL-5, S.A.E. 75W –40°F (–40°C) +35°F (+1.6°C)
STC 05-006 Hypoid Gear Oil GL-5, S.A.E. 75W/140 –40°F (–40°C) - - -*
*There is no upper limit on these outside temperatures, but the axle sump temperature must never exceed
250°F (+121°C).