2011/09/27 Caterpillar

Backhoe Loader:

422E (S/N: MAW1-UP)

428E (S/N: DPH1-UP)

432E (S/N: JBA1-UP)

434E (S/N: SEF1-UP; SJL1-UP)

442E (S/N: EME1-UP)

444E (S/N: NBA1-UP)

Description of Change: A new torque value has been released for line relief valve plugs used on the machines listed. The new torque value ensures proper sealing of the 4d-2297 O-Ring Seal used on the relief valve plugs.

The new torque value for the line relief valve plugs is 43 ± 2 N·m (32 ± 1.5 lb ft).

Note: Make sure that when replacing the 4D-2297 O-Ring Seal the updated torque value is used.

Adaptable To: The new torque value is adaptable to the following machines.

• 422E (S/N: MAW1-1284,1286-1352)

• 428E (S/N: DPH1-687,689-3183,3185-3240)

• 432E (S/N: JBA1-1988)

• 434E (S/N: SEF1-288,319-402; SJL1-398,426-527)

• .442E (S/N: EME1-240)

• 444E (S/N: NBA1-302)

• 422E (S/N: MAW1353-UP)

• 428E (S/N: DPH3241-UP)

• 432E (S/N: JBA1989-UP)

• 434E (S/N: SEF403-UP; SJL528-UP)

• 442E (S/N: EME241-UP)

• 444E (S/N: NBA303-UP)