PreSet
®
Hub Assemblies
ConMet PreSet hub assemblies
include precision-machined hubs,
premium seals, specially toleranced
roller bearings and unique precision-
machined bearing spacers. This
combination eliminates the need
to manually adjust wheel end play.
These components are delivered as
a complete assembly, reducing the
potential for premature failures due
to incorrect end play settings and/or
improper installation practices.
106924a
ABS RING
INNER
BEARING
CONE
INNER
BEARING
CUP
OUTER
BEARING
OUTER
BEARING
CONE
LUBRICANT
FILL PLUG
SPACER
(SECTIONED)
OIL SEAL
PreSet Hub and Components
FIGURE 38
PreSet Wheel Hubs – Recommended Service
17ConMet
When inspections indicate that
service is necessary on a PreSet
Hub, follow the recommended
service, inspection, reassembly
and reinstallation instructions found
in the following section.
In order to ensure optimum
wheel hub performance, ConMet
recommends that only approved
PreSet service parts be used to
replace all critical components of
the system. Refer to the back of
this section for a listing of approved
parts.
HUB REMOVAL AND
DISASSEMBLY
Vehicles on jacks can fall, causing serious personal
injury or property damage.
Never work under a vehicle supported by a jack
without supporting the vehicle with stands and
blocking the wheels. Wear safe eye protection.
WARNING
!
1. Park the vehicle on a level
surface. Block the wheels
to prevent the vehicle from
moving.
2. Raise the axle until the tires are
off the oor.
3. Place safety stands under the
trailer frame or under each axle
spring seat (see gure 39).
FIGURE 39
4. Remove the tire and wheel
assembly using procedures
specied by the wheel
manufacturer (see gure 40).
103160a
FIGURE 40
Sudden release of compressed air can cause
serious personal injury and damage to
components.
Before you service a spring chamber, carefully
follow the manufacturer’s instructions to
compress and lock the spring to completely
release the brake. Verify that no air pressure
remains in the service chamber before you
proceed.
WARNING
!
5. If the axle is equipped with
spring brake chambers,
carefully compress and lock
the springs so that they cannot
actuate (see gure 41).
103161a
FIGURE 41
6. For drum brakes, remove
the brake drum. Support the
drum during the removal
process to prevent damage
to the components. For disc
brakes, remove caliper per
manufacturers’ recommended
procedure.
If the hub to be disassembled is a drive hub,
remove the drive axle shaft, and capture the oil
(see gure 42).
NOTE
106803a
Removing the Drive Axle Shaft
FIGURE 42
5. PreSet Wheel Hubs – Recommended Service
To Next Page
Loading...