Conmet Conventional - 7. Lubrication; Hub Lubrication Procedures

41ConMet
7. Lubrication
DRIVE HUB
LUBRICATION
Drive hubs can be lubricated by
installing one quart of oil through
the ll plug in the barrel of the hub.
The proper installation torque for the ll plug is
20-25 ft-lbs.
CAUTION
!
If no ll plug is present, the drive
hub can be lubricated by lifting the
opposite side of the axle 8" to allow
the lubricant to run down the axle
housing and into the hub assembly.
Elevate the axle for two minutes to
allow the lubricant time to ll the
hub. Repeat the process for the
opposite side of the vehicle. The
rear axle carrier should be lled to
the proper level to ensure adequate
lubricant is available to ll the
entire hub. Rell the carrier to the
proper level after this procedure is
completed.
STEER AND TRAILER
HUBS WITH OIL
LUBRICANT
Only use oil approved by the seal manufacturer
(see approved list from the seal manufacturer or
on www.conmet.com).
Some hubs are provided with a ll hole, located in
the barrel and between the bearings for adding
lubricant.
NOTE
1. Fill the hub through the hubcap
or the ll hole with oil. It may
be necessary to add lubricant
more than once to adequately
ll the hub (see gure 86).
27
105753a
Filling the Hub with Oil
FIGURE 86
2. Be certain the hubcap is
properly lled to the “oil level”
mark on the face of the cap
(see gure 87). Allow the
initial ll amount to settle for
10 minutes. Repeat the ll
procedure until the oil is at the
ll line on the hubcap.
28
105754a
FULL
LINE
Fill to "Oil Level Line"
FIGURE 87
3. Be sure to put the ll hole plug
back into the hubcap and that
the vent is working properly.
TRAILER HUBS WITH
SEMI-FLUID GREASE
LUBRICANT
Failure to ll and maintain the hub with the
correct amount of semi-uid grease may cause
premature failure of the wheel hub system,
bearing failure and possible loss of the wheel.
WARNING
!
1. Remove the ll hole plug.
2. Loosen the hubcap bolts to
allow air to escape while the
hub is lling.
3. Fill the hub with the OEM
recommended amount of room
temperature (60°F minimum)
semi-uid grease through the ll
hole in the hub (see gure 88).
- For proper ll levels using
semi-uid grease, see the
chart on the next page.
29
105755a
Filling Hub with Semi-Fluid Grease
FIGURE 88
4. Retorque the hubcap bolts to
12-18 ft-lbs in a star pattern.
5. Reinstall and tighten the ll plug
to 20-25 ft-lbs.