Axle And Geared Hub; Universal And Slip Joint Lubrication - Hummer H1 Service Manual

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Axle and Geared Hub

Check axle and hub lubricant condition and level every 3,000
mi (4,800 km) or semiannually, whichever occurs first.
Geared hub level should be within 1/2 in. (12.7 mm) of fill
plug opening when lubricant is cold, or to plug level when hot.
Axle level should be within 1/4 in. (6.4 mm) of fill plug open-
ing when lubricant is cold, or to plug level when hot
(Figures 1-24 and 1-25).
Change axle and hub lubricant when contaminated by water or
foreign material.
Use GL-5, SAE 80W-90 or 75W-90 gear lubricant only.
LUBRICATION POINT
DRAINPLUG
Figure 1-24: Geared Hub Fill/Drain Plug Locations
DRAINPLUG
Figure 1-25: Axle Fill/Drain Plug Locations
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General Information, Lubrication and Maintenance
FILL PLUG
LUBRICATION
POINT
FILL PLUG

Universal and Slip Joint Lubrication

Lubricate U-joints with a multipurpose, NLGI-LB grade chas-
sis grease.
Lubricate propeller shaft universal and slip joints every 3,000
mi (4,800 km), or semiannually, whichever occurs first. Use a
hand operated or low-pressure air powered lubrication gun. If
operating conditions are severe service at 1,000 mi. (1,600 km)
intervals.
The rear propeller shaft U-joints have two grease fitting loca-
tions (Figure 1-26). The front shaft has four fitting locations
(Figure 1-27)
U-JOINT LUBE FITTINGS
Figure 1-26: Propeller Shaft Lube Points
LUBE FITTING
LOCATIONS
Figure 1-27: Front Propeller Shaft Lube Points
1-27
LUBE FITTING
LOCATIONS