JLG T350 Troubleshooting Manual page 130

SECTION 4 - POSSIBLE CAUSES
4.1 POSSIBLE CAUSES
Item
4.1.36 The outrigger switch or solenoid wires may be
swapped
4.1.37 Hydraulic fluid level may be low
4.1.38 Personality may need to be increased to initiate flow
4.1.39 Pump may be defective
4.1.40 Oil filter may be restricted
4.1.41 Cylinder may be defective
4.1.42 Hose may be pinched at turntable
4.1.43 Hydraulic Manifold may be defective
4.1.44 Check Valve may be defective
4.1.45 Main Relief Valve may be defective
4.1.46 Incorrect hose routing to tank
4.1.47 Torn hose
4.1.48 Holding valve may be defective
4.1.49 Motion may be mechanically limited
4.1.50 Telescope Out valve may be defective
4.1.51 Telescope In valve may be defective
4.1.52 Swing Left valve may be defective
4.1.53 Swing Right valve may be defective
4.1.54 Level Up (Extend) valve may be defective
4.1.55 Level Up (Extend) Relief may be set incorrectly
4.1.56 Level Down (Retract) valve may be defective
4.1.57 Level Down (Retract) Relief may be set incorrectly
4.1.58 Lift up valve may be defective
4.1.59 Lift Down valve may be defective
4.1.60 Jib up valve may be defective
4.1.61 Jib Down valve may be defective
4.1.62 Outrigger Enable valve on cylinder may be defective
4.1.63 Outrigger Extend/Retract valve may be defective
4.1.64 X011 is not connected to the battery
4.1.65 30A fuse in ground control box blown
4.1.66 Key switch not on
4.1.67 Emergency stop switch is pushed
4.1.68 Enable switch is not held
4.1.69 Hydraulic Pump Motor may be defective
4.1.70 Red Pump Motor Positive wire may be cut
4.1.71 Black Pump Motor Negative wire may be cut
4.1.72 Power wire terminals may be corroded or loose
4.1.73 Hydraulic pump engine coupling may be defective
4-130
Possible Cause Possible Solution
Assure that the outriggers are wired correctly.
Check for leaks. Fill hydraulic reservoir to recommended level.
Increase the personality using the analyzer as described in the Operators
Manual
Repair or replace
Replace oil filter
Repair or replace
Repair or replace
Repair or replace
Repair or replace
Repair or replace
Repair hose routing
Repair or replace
Repair or replace
Remove any obstructions
Repair or replace
Repair or replace
Repair or replace
Repair or replace
Repair or replace
Check or Set, See Service Manual
Repair or replace
Check or Set, See Service Manual
Repair or replace
Repair or replace
Repair or replace
Repair or replace
Repair or replace
Repair or replace
Connect X011 red wire to B+, X011 black wire to B-
Replace fuse
Turn to either ground or platform control
Pull ground emergency stop switch for ground operation or both ground
and platform emergency stop switches for platform operation
Hold enable switch while operating
Repair or replace
Repair or replace
Repair or replace
Clean terminals and tighten if loose
Repair or replace
T350 T500J 3121203