VALVE AS 4777643 - Caterpillar

Electronic Control Module (Front) - Remove and Install Procedure
Start By:
Move the battery disconnect switch to the OFF position.Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Mark parts as needed to aid in assembly.
Illustration 1 g03420888
Open access door (1) on the front electric panel, which is mounted to the front of the water tank.
Illustration 2 g03420893
Disconnect harness plug (4) from electronic control module (5) .
Remove two bolts (2) and two washers (3). Remove electronic control module (5) .
Install electronic control module (5) in the reverse order of removal.Electronic Control Module (Rear) - Remove and Install Procedure
Start By:
Move the battery disconnect switch to the OFF position.Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Mark parts as needed to aid in assembly.
Illustration 3 g03420903
Open access door (1) on the rear electric panel, which is mounted to the rear of the water tank.
Illustration 4 g03420907
Disconnect harness plug (5) from electronic control module (2) .
Remove two bolts (3) and two washers (4). Remove electronic control module (2) .
Install electronic control module (2) in the reverse order of removal.