Hydraulic Boom Troubleshooting Guide - ODB LCT6000 Owner's Manual

5.3 Hydraulic Boom Troubleshooting Guide

BOOM WILL NOT GO UP
1. Check the fluid level in the reservoir.
2. Using a test light make sure there is current at the outside solenoid post (item#2), this has a 4 gauge Red battery
cable attached. If no current is found check the battery condition and battery connections.
3. If there is current at this post, depress the "up" button (item# 3), while pressing the "up" button check for current
at the middle post (item# 1), it has a White wire attached. If there is current at the post (item# 1) the solenoid
may be defective. Run a jumper wire connecting #1 and #2. This will test the motor, bypassing the solenoid.
If the boom raises, the motor is okay (motor part# MP-08004) but the solenoid is bad and needs to be replaced.
Solenoid part number is MP-17744.
4. If there is NO current at the post (item# 1) check the wiring between the switch and the solenoid. If the wiring
checks out okay, the switch is bad and needs to be replaced.
BOOM WILL NOT GO DOWN
1. Using a test light make sure there is current at the outside solenoid post (item#2), this has a 4 gauge Red battery
cable attached. If no current is found check the battery condition and battery connections.
2. Press and hold the "down" button (item# 4), take a test light and probe through the insulation and test for current
on the red wire at the valve (item #5).
3. If there is current, the valve is bad and need to be replaced. Valve part number is MP-19283.D. If there is NO
current, check the wiring between the switch and valve, especially any connections. If the wiring checks out
okay, the switch is bad and needs to be replaced.
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Service Section
800-446-9823
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LCT6000