PRIMAAX
®
EX / PRIMAAX
®
for International Truck Vehicles
17730-283
39
Component Replacement
SECTION 8
Component Replacement
FASTENERS
When servicing a vehicle, Hendrickson recommends replacing all removed fasteners
with new equivalent fasteners. Maintain correct torque values at all times. Check torque
values as specified. See Hendrickson’s Torque Specifications Section of this publication.
If non-Hendrickson fasteners are used follow torque specifications listed in the vehicle
manufacturer’s service manual.
HEIGHT CONTROL VALVE
The height control valve is not supplied by Hendrickson, although it is a required component.
Hendrickson is not responsible for components supplied by the vehicle manufacturer. For assis-
tance with inspection, adjustments, maintenance, replacement and rebuild instructions on
these components, refer to vehicle manufacturer’s instructions.
AIR SPRING
■
9", 10½" Ride Height
DISASSEMBLY
1. Chock
the
wheels.
2. Support the frame.
3. Disconnect the height control valve arm(s) from the rubber grommet, refer to vehicle manu-
facturer’s instructions.
PRIOR TO AND DURING DEFLATION AND INFLATION OF THE AIR SUSPENSION SYSTEM, ENSURE THAT
ALL PERSONNEL AND EQUIPMENT ARE CLEAR FROM UNDER THE VEHICLE AND AROUND THE SERVICE
AREA, FAILURE TO DO SO CAN CAUSE SERIOUS PERSONAL INJURY, DEATH, OR PROPERTY DAMAGE.
4. See additional Air Spring Cautions and Warnings in the Important Safety Notice Section of
this publication prior to deflating or inflating the air system.
5. Lower the height control valve arm(s) to exhaust the air in the air springs and deflate the
rear suspension.
SOME VEHICLE APPLICATIONS, SUCH AS VEHICLES EQUIPPED WITH OUTRIGGERS, RETAIN SOME AIR
PRESSURE IN THE AIR SPRINGS AT ALL TIMES. PRIOR TO PERFORMING ANY MAINTENANCE, SERVICE,
OR REPAIR OF THE SUSPENSION, VERIFY EACH AIR SPRING IS COMPLETELY DEFLATED. FAILURE TO
DO SO COULD RESULT SERIOUS PROPERTY DAMAGE AND/OR SEVERE PERSONAL INJURY.
6. Remove the air line from the air spring.
IF THE AIR SPRING IS BEING REMOVED FOR AN ALTERNATE REPAIR, IT IS MANDATORY TO LUBRICATE
THE LOWER AIR SPRING FASTENERS WITH PENETRATING OIL AND REMOVE WITH HAND TOOLS TO
PREVENT DAMAGE TO THE LOWER AIR SPRING MOUNTING STUD. FAILURE TO DO SO CAN CAUSE
COMPONENT DAMAGE AND VOID WARRANTY.
7. If the air spring is being removed for an alternate repair it will be necessary to lubricate the
lower mounting fasteners with penetrating oil. This will help prevent the air spring mounting
studs from breaking during the removal process.
8. Remove and discard the lower mounting fasteners from the air springs using
HAND TOOLS
only.
9. Remove the lower air spring mounting bracket from the cross tube.
10. Remove and discard the fasteners from the upper air spring mounting bracket.
11. Remove the air spring.
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]
