PUMP GP-WATER 1W6602 - Caterpillar

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(1) Electronic Control Module (ECM) (2) J1 Connector (3) J2 Connector (4) "SSR 170" Lift Relay (5) "SSR 171" Lift Relay (6) "SSR 172" Drop Relay (7) "SSR 173" Drop Relay (8) Disconnect Switch (9) "FU 101" (10) "FU 102" (11) "FU 18" (12) "VBM" Voltage Band Monitor (13) "SVR" Sample Voltage Relay (14) "CT 2" Forward Current Transducer (15) "CT 1" Reverse Current Transducer (16) Negative Stud "PDB 152" (17) Magnet Fuse (Circuit) (18) Circuit Board (19) Positive Stud "PDB 151" (20) Boost Relay (21) Controller Harness
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(22) Magnet On (23) Volts Fault (24) Over 75% Duty Cycle (25) Generator Hot (26) + Ground Fault (27) - Ground Fault (28) "Drop Time" Selector SwitchTest Step 1. CHECK THE NEGATIVE TERMINAL OF THE MAGNET FOR A SHORT TO GROUND.
Ensure that the machine is in the "Lift" mode.
Press the "Drop" switch on the LH joystick before proceeding.
Before making any adjustments to the generator the engine must be shut off and the main disconnect switch on the controller must be in the off position. Personal injury can occur.Close all controller panel doors before the generator is started. Personal injury can occur.Never handle the leads to the magnet unless the generator is stopped and the main disconnect switch on the controller is in the off position. Personal injury can occur.
Switch the engine to the OFF position. Ensure that the generator is not rotating before proceeding.
Illustration 3 g01556873
Control Panel door handle
Open the disconnect switch with the door handle (See Illustration 3) of the Control Panel. Then, open the enclosure door with a screwdriver with your left hand. Hold the external handle in the release position with your right hand.
Illustration 4 g01560238
(16) Negative Stud "PDB 152" (17) Magnet Fuse (Circuit) (19) Positive Stud "PDB 151"
Disconnect both cables to the magnet from the bottom side of positive stud and the negative stud in the controller.
Disconnect both cables at the positive terminal and the negative terminal of the magnet.
At the magnet, connect the ground lead of the megohmmeter securely to the magnet's frame and the other test lead to the negative terminal of the magnet and check the resistance to ground.Expected Result:If the resistance is less than 0.05 megohm, the magnet is grounded.Results:
YES - The magnet is grounded.Repair: Remove the magnet from service. Repair the magnet or replace the magnet.STOP
NO - The positive terminal of the magnet is NOT grounded. Proceed to test step 2.Test Step 2. CHECK THE NEGATIVE CABLE TO THE MAGNET FOR A SHORT TO GROUND.
The negative cable remains disconnected from the previous test step.
At the controller, connect the ground lead of the megohmmeter securely to the machine frame.
Connect the positive lead of the megohmmeter to the negative cable of the magnet that was removed from the negative stud.
Check the resistance to ground.Expected Result:The negative cable of the magnet is grounded.Results:
YES - The negative cable of the magnet is grounded. The cable has failed.Repair: Replace the cable.STOP
NO - The negative cable of the magnet is NOT grounded. Proceed to test step