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W450311 Rev C 2/13
3.4 Function Kickout Fuse (Fus1)
The computer unit contains a standard 10 amp replaceable fuse. The fuse protects the function kickout
circuit and relay contacts, if a short circuit occurs across the crane kickout solenoids. Replace the fuse,
if the system error codes indicate that the function kickout power feed is missing. Ensure the crane
circuit breaker is closed and power from the crane is present.
NOTE: Prior to replacing the fuse, ensure any electrical shorts which may have caused the failure of
the original fuse have been removed.
3.5 Replacing the Computer Unit
COMPUTER REMOVAL
1. Lower the boom until the boom hoist cylinder is completely retracted and on its stop or the boom
is firmly in the boom rest.
2. Disconnect the hydraulic connections at the computer unit.
3. Disconnect both electrical connectors at the computer unit.
4. Remove the hardware securing the computer to the cab wall.
COMPUTER INSTALLATION
1. Secure the computer unit to the cab wall with the mounting hardware.
2. Ensure the electrical connections face downward.
3. Connect the electrical connectors.
4. Remove the protective caps from the hydraulic ports.
5. Connect the base-side pressure (green band) hose to the piston pressure port.
6. Connect the rod-side pressure (red band) hose to the rod pressure port.
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