USTC 2500 jbt - Hydraulic Components

SECTION 3 – TROUBLESHOOTING
3120933 Rev. 0 USTC 3-5
TROUBLE PROBABLE CAUSE REMEDY
Table 3-4. Hydraulic Components
Outrigger will not extend. Control rod or lever broken or
disconnected.
Low hydraulic oil level.
Restricted or broken supply line.
Malfunctioning hydraulic pump.
Worn control valve spool.
Hydraulic lines incorrectly
connected to outrigger control
valve.
Hydraulic lines incorrectly
connected to cylinder.
Outrigger holding valve stuck in
closed position.
Relief valve in control valve set
too low.
Malfunctioning outrigger valve.
Holding valve stuck in closed
position.
Control rod or lever broken or
disconnected.
Low hydraulic oil level.
Restricted or broken supply line.
Malfunctioning hydraulic pump.
Hydraulic lines incorrectly
connected to outrigger control
valve.
Hydraulic lines incorrectly
connected to cylinder.
Malfunctioning crossover valve.
Malfunctioning outrigger valve.
Excessive oil leak past piston
seal.
Relief valve in control valve set
too low.
Replace switch.
Add oil.
Remove line and clear
obstruction or replace line.
Repair or replace pump.
Check pressure delivery from
control valve and repair or
replace valve.
Connect hydraulic lines properly.
Connect hydraulic lines properly.
Repair or replace holding valve.
Adjust or replace relief valve.
Repair or replace outrigger
control valves.
Clean or replace holding valve.
Repair or replace control rod or
lever.
Add oil.
Remove line and clear
obstruction or replace line.
Repair or replace pump.
Connect hydraulic lines properly.
Connect hydraulic lines properly.
Repair or replace crossover
valve.
Repair or replace outrigger
control valves.
Repair or replace cylinder.
Adjust or replace relief valve.
Outrigger will not retract.
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