Usage:
834B (92Z) Wheel Tractors;
836 (3RL) Compactors;
988F (8YG) Wheel Loaders
Description of Change: Two improvements have been made in the differential carrier to the axle housing bolted joint to eliminate loosening of bolts and oil leaks.
The first improvement is a change of the torque for the 24 2A-1538 Bolts to 230 ± 40 N·m (170 ± 30 lb ft), with an additional turn of 120° ± 10°. Formerly, a special high torque of 475 ± 60 N·m (350 ± 45 lb ft) was used.
The second improvement is that the pilot diameter of the differential carrier has changed to an interference fit from the former slip fit.
Adaptable To: The following chart denotes machines that can adapt to these improvements.
Machines With Bolt Loosening Prior To Interference Fit
Machines experiencing bolt loosening that are not equipped with an interference fit differential carrier are not required to purchase a new differential carrier.
These machines can be modified by using 24 4E-5831 Bolts and 24 4E-5685 Spacers, which replace the former 24 2A-1538 Bolts and 24 5P-8248 Washers.
The new 4E-5831 Bolts (high strength) are longer than the factory installed 2A-1538 Bolts, and come with pre-applied thread lock. The 4E-5831 Bolts should be tightened to a torque of 230 ± 40 N·m (170 ± 30 lb ft), and turned an additional 120° ± 10°.