Bolster Springs - ProGear Hendrickson HN FR Series Service Manual

NOTE
17730-285
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • parts@eprogear.com

BOLSTER SPRINGS

Replacement of bolster springs is possible from under the vehicle without the removal of the
tires, rims or wheels. Hendrickson recommends that both bolster springs on one side of vehicle
be replaced even if only one shows wear.
FIGURE 8-6
DISASSEMBLY
1. Chock the front wheels of the vehicle.
2. Remove the fasteners securing the anchor plate assembly to the auxiliary spring mounting
plate. Remove the anchor plate assembly.
3. Remove the fasteners securing the bolster springs to the saddle and equalizing beam (8
per bolster), see Figure 8-6.
4. Raise the frame of the vehicle just enough to remove the load from the bolster springs.
Support the frame at this height with frame stands.
5. Remove the bolster springs.
ASSEMBLY
THE BOLSTER SPRING MOUNTING BOLT HEADS MUST BE POSITIONED AT THE RUBBER SIDE OF THE
BOLSTER SPRINGS TO PREVENT THE BOLSTER SPRINGS FROM BEING DAMAGED BY THE THREADED
ENDS OF THE BOLTS.
1. Install the bolster springs between the equalizing beam and saddle.
2. Loosely install the fasteners securing the bolsters to the saddle and the equalizing beam
assembly making sure the bolt heads are towards the bolster springs.
3. Once all fasteners have been loosely installed remove the frame supports and lower the
vehicle to place the full load of the vehicle on the suspension.
4. Tighten the bolsters spring fastener locknuts to
5. Install the anchor plate assembly through the rebound strap loop.
6. Install the anchor plate assembly and fasteners to the auxiliary spring mounting plate.
7. Tighten the anchor plate assembly fastener locknuts to
8. Remove the wheel chocks.
33-45 foot pounds torque.
27
HN ® FR Series
90-105 foot pounds torque.
Component Replacement