PRIMAAX
®
EX / PRIMAAX
®
for International Truck Vehicles
Component Replacement
46
17730-283
TORQUE ROD BUSHING
NOTE
Some torque rods assemblies equipped on PRIMAAX EX / PRIMAAX suspensions have curled end
hubs and are not re-bushable. The entire torque rod assembly must be replaced. This feature
provides superior bushing retention in the torque rod end hub.
■
These torque rods can be identified by the part number 67428-XXX or the suffix N after any
part number (i.e. 62000-615N).
DISASSEMBLY
You will need:
■
A vertical press with a capacity of at least 10 tons
■
A receiving tool, see the Special Tools Section of this publication for shop made tool
specifications.
DO NOT USE HEAT OR USE A CUTTING TORCH TO REMOVE THE BUSHINGS FROM THE TORQUE ROD.
THE USE OF HEAT WILL ADVERSELY AFFECT THE STRENGTH OF THE TORQUE ROD; HEAT CAN CHANGE
THE MATERIAL PROPERTIES. A COMPONENT DAMAGED IN THIS MANNER CAN RESULT IN THE LOSS OF
VEHICLE CONTROL, POSSIBLE PERSONAL INJURY OR PROPERTY DAMAGE AND VOID WARRANTY.
1. Remove the torque rod as detailed in this section.
SERVICE HINT
When servicing a straddle mount bar pin type bushing assembly, mark the clocking position of
the straddle mount bar pin flats on the torque rod end hub before disassembly. This clocking
mark will serve as a guide when installing the new bushing assembly so the original clocking
position can be retained.
2. When replacing a straddle mount bar pin type bushing assembly, mark the clocking position
of the bushing assembly’s bar pin flats with a paint stick on the torque rod end hub prior to
disassembly. Clocking varies for different model configurations, see Figure 8-6.
FIGURE 8-6
3. Install the torque rod in the press. Support the torque rod end on the receiving tool with the
end of the torque rod centered on the tool. Be sure the torque rod is squarely supported on
the press bed.
4. Push directly on the inner metal of the bushing assembly until the bushing assembly clears
the torque rod end tube.
5. Clean and inspect the inner diameter of the torque rod ends.
ASSEMBLY
NOTE DO
NOT
use a petroleum or soap base lubricant. Such lubricants can cause adverse reactions
with the bushing, such as deterioration of the rubber, causing premature failure.
1. Lubricate the inner diameter of the torque rod end hub and the new rubber bushing with
light Naphthenic Base Oil, such as 60 SUS at 100°F, see Figure 8-7.
2. Support the torque rod end tube on the receiving tool with the end tube of the torque rod
centered on the receiving tool.
NOTE
The straddle mount bar pin bushings must have the mounting flats positioned perpendicular to
axis of the torque rod.
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]
