TOPHANDLER JUNCTION BOX MAINTENANCE
THIS WORK PACKAGE COVERS
Tophandler Electronic Control Unit (ECU): Removal,
Relay: Removal, Installation
WP 0048 00
Tools and Special Tools
Tool Kit, General Mechanic's (Item 128, WP 0289
Master battery switch in OFF position
TOPHANDLER ELECTRONIC CONTROL UNIT (ECU) REMOVAL
Tophandler ECU is located inside junction box at end of boom, above tophandler. Tophandler ECU is
identified as no. 791 on system electrical diagrams (WP 0048 00).
Loosen six screws (1) and remove cover (2) from tophandler junction box (4). Three circuit breakers (5) should be in
Inspect rubber seal (3) on cover (2). Replace seal only if damaged.