3408E & 3412E INDUSTRIAL ENGINES Caterpillar

1. Disconnect wiring connector (1) from hydraulic control valve (2).

2. Remove four bolts (3) and remove hydraulic control valve (2). Upon installation, tighten bolts (3) to a torque of 7.45 ± .65 N·m (66 ± 6 lb inch).

3. Remove four O-ring seals (5) from the two housings.

4. Remove four O-ring seals (4) from the bottom side of the Hydraulic control valve.

NOTE: Check all O-ring seals for wear or damage and replace with newparts if necessary.

NOTE: For installation of the hydraulic control valve, reverse the removal procedure.