PRIMAAX
®
EX / PRIMAAX
®
for International Truck Vehicles
17730-283
61
Component Replacement
FIGURE 8-37
SERVICE HINT
It may be necessary to squeeze the U-bolts slightly to facilitate installation through the bottom
axle cap.
3. Install the new U-bolts. Verify that the U-bolts are seated properly in the top pad channels
and through the bottom cap, see Figure 8-34.
NOTE
U-bolt clamp group hardware for PRIMAAX EX / PRIMAAX suspensions are ¾"-16 UNF Grade C
locknuts and ¾"-16 UNF Grade 8 U-bolts which are phosphate and oil coated.
4. Install the U-bolt ¾" fasteners and hand tighten,
DO NOT
tighten to torque at this time.
PRIOR TO TIGHTENING THE U-BOLTS TO THE FINAL TORQUE, ENSURE THE U-BEAM AND THE BOTTOM
CAP ASSEMBLY ARE CENTERED ON THE AXLE (A = B ±
1
⁄
8
"), SEE FIGURE 8-38. FAILURE TO DO SO
COULD CAUSE PREMATURE COMPONENT WEAR OR CAUSE UNEVEN LOAD DISTRIBUTION.
5. Center the U-beam assembly and the bottom cap on the axle (A = B ±
1
⁄
8
"), see Figure 8-38.
FIGURE 8-38
Bottom Cap
Assembly
TOP VIEW
Brake Flange
Cross Tube
Support Beam
U-beam Assembly
Axle
SERVICE HINT
It may be necessary to raise the front of the differential to allow the D-Pins to engage the
bottom cap.
6. Raise the U-beam assembly until the D-Pins engage in the bottom cap.
7. Install the D-Pin fasteners with the bolt heads on the forward side of the bottom cap, see
Figure 8-34.
8. Lower the front differential to allow the full engagement of the D-Pins into the bottom caps.
9. Prior to tightening the D-pin fasteners, verify the bottom cap is centered over the sup-
port beam.
FIGURE 8-39
10. Tighten the D-Pin ¾" locknuts to 275-325 foot pounds torque.
11. Tighten the U-bolt locknuts evenly in 50 foot pounds increments in the
proper pattern to achieve uniform bolt tension, see Figure 8-39.
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]
