PRIMAAX
®
EX / PRIMAAX
®
for International Truck Vehicles
Preventive Maintenance
32
17730-283
■
These torque rods can be identified by the part number 67428-XXX or the suffix N after any
part number (i.e. 62000-615N).
A two-piece
transverse torque rod
is available to cut and weld to the desired length, see
Hendrickson Literature No. 45745-148.
SHOCK ABSORBER INSPECTION
FIGURE 6-16
Hendrickson uses a long service life, premium shock
absorber on all PRIMAAX EX / PRIMAAX suspensions. If
shock absorber replacement is necessary, Hendrickson
recommends that the shock absorbers be replaced with
original
Hendrickson Genuine parts for servicing.
Failure to do so will affect the suspension performance,
durability, and will void the warranty.
Inspection of the shock absorber can be performed by
doing a heat test, and a visual inspection, also inspect
the shock absorber mounting brackets and hardware
for damage or wear, replace as necessary. See instruc-
tions on shock absorber replacement in the Component
Replacement Section of this publication. It is not neces-
sary to replace shock absorbers in pairs if one shock
absorber requires replacement.
HEAT TEST
1. Drive the vehicle at moderate speeds on rough road for minimum of fifteen minutes.
DO NOT GRAB THE SHOCK AS IT COULD POSSIBLY CAUSE PERSONAL INJURY.
2. Lightly touch the shock body carefully below the dust cover, see Figure 6-16.
3. Measure the shock absorber temperature using an Infrared Temp Gun or touch the frame
to get an ambient reference. A warm shock absorber is acceptable; a cold shock absorber
should be replaced.
4. To inspect for an internal failure, remove and shake the suspected shock. Listen for the
sound of metal parts rattling inside. Rattling of metal parts can indicate that the shock has
an internal failure.
VISUAL INSPECTION
Look for these potential problems when doing a visual inspection as shown in Figure 6-17.
Inspect the shock absorbers fully extended. Replace as necessary.
FIGURE
6-17
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]
