2001/10/15 Caterpillar

Track-Type Tractor:

D11R (S/N: 7PZ1-UP; 9TR1-UP; 9XR1-UP; AAF1-UP)

Disassembly and Assembly, SENR1782, "D11R Track-Type Tractor Power Train", "Track Roller - Install". This module is part of Service Manual, RENR2095. The torque value that is given in Step 3 is incorrect. Replace Step 3 with the following information.

Reference: Service Magazine, SEPD0261, 3 July 1995, "Large Special Taps with Spiralock Threads Provide Improved Bolt Retention"

3. Tighten bolts (3) to a torque of 2200 ± 200 N·m (1621 ± 147 lb ft). Tighten the abutment side of the cap first to the proper torque. This is marked on the cap "TIGHTEN FIRST".

Note: Large special taps with Spiralock threads are available. Spiralock threads are used on the minor bogies on the tractor's undercarriage. Spiralock threads provide improved bolt retention.

Note: Use of a standard tap in those holes will eliminate the Spiralock feature.