2001/10/15 Caterpillar

Track-Type Tractor:

D11N (S/N: 4HK1-UP; 74Z1-UP)

Specification, SENR3284, "D11R Track-Type Tractor Power Train", "Track Rollers". This module is part of Service Manual, SENR3280. The torque value that is given in Step 4 is incorrect. Replace Step 4 with the following information.Service Magazine, SEPD0261, 3 July 1995, "Large Special Taps with Spiralock Threads Provide Improved Bolt Retention"

(4) Torque for the bolts that hold the rollers to the bogie ... 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.