Improved Parts are Now Used in the Differential Lock on Certain Compact Wheel Loaders {3258, 3278} Caterpillar

Compact Wheel Loader

910K (S/N: L221-156; AY41-2830)

910M (S/N: H221-233)

914K (S/N: CD21-1357; L241-164)

914M (S/N: H241-339)

Reference: Special Instruction , M0080425 , "Procedure to Rework the Differential Lock on Certain Compact Wheel Loaders"

Description Of Change: Improved parts are now used in the differential lock on the machines listed above. The improved parts will reduce the friction and enable the piston to move freely when the differential lock is operated. The piston and O-ring seals are coated with Poly Tetra Fluoro Ethylene (PTFE) and springs are improved at the supplier.

Adaptable To: The improved procedure is adaptable to the products within the listed serial numbers, and effective with all products after the listed serial numbers.

Refer to Table 1 for the improved parts in the differential lock:

These improved parts are only effect to the machines that were fitted with the following axle group part numbers:

• 490-7848

• 490-7849

• 490-7850

• 494-9190

• 494-9191