Jib Up Function Inoperative; Jib Down Function Inoperative; Outrigger Set Function Inoperative; Outrigger Stow Function Inoperative - JLG T350 Troubleshooting Manual

SECTION 1 - TROUBLESHOOTING BY FUNCTION

1.21 JIB UP FUNCTION INOPERATIVE

Step Pretest Instructions
1.21.1
1.21.2 Engage enable and jib up
switch
1.21.3 Install a 0 to 5000 PSI (345
bar) pressure gauge at the
manifold G port
1.21.4 Plumb a 0 to 5000 PSI (345
bar) pressure gauge into the
manifold P port
1.21.5 Plumb a 0 to 5000 PSI (345
bar) pressure gauge into the
hose from the jib cylinder cap
end.

1.22 JIB DOWN FUNCTION INOPERATIVE

Step Pretest Instructions
1.22.1
1.22.2

1.23 OUTRIGGER SET FUNCTION INOPERATIVE

See 1.12 Ground Leveling Not Functioning Properly

1.24 OUTRIGGER STOW FUNCTION INOPERATIVE

See 1.12 Ground Leveling Not Functioning Properly
1-40
Test
Basic check of likely causes
DC - Is pump motor running?
Gas - Is engine running at high
idle
Engage the enable and jib up
switch. Check the pressure.
Engage the enable and jib up
switch. Check pressure at
manifold P port
Check pressure at the jib cylin-
der while activating jib up at
ground controls
Test
Basic check of likely causes
Does Manual Descent lower
the jib?
T350 T500J
Result
Yes
No
Yes
No
Above Min. Jib Up Pressure psi
(bar)
Below Min. Jib Up Pressure psi
(bar)
Above Min. Jib Up Pressure psi
(bar)
Below Min. Jib Up Pressure psi
(bar)
Above Min. Jib Up Pressure psi
(bar)
Below Min. Jib Up Pressure psi
(bar)
Result
Yes
No
Corrective Action
Possible Causes: 4.1.32, 4.1.33,
4.1.37
Go to step 1.21.3
See 1.2 Pump Motor Will Not Operate -
DC Powered Models
Go to step 1.21.3
See 1.8 Engine High Idle Inoperative -
Engine Models
Go to step 1.21.5
Go to step 1.21.4
Possible Causes: 4.1.38, 4.1.45,
4.1.74, 4.1.40, 4.1.10, 4.1.43
Possible Causes: 4.1.46, 4.1.47,
4.1.74, 4.1.45, 4.1.39, 4.1.10
Possible Causes: 4.1.49, 4.1.48,
4.1.41
Possible Causes: 4.1.42, 4.1.60
Corrective Action
Possible Causes: 4.1.33, 4.1.37,
4.1.49
Possible Causes: 4.1.38, 4.1.61,
4.1.48, 4.1.10
Possible Causes: 4.1.41, 4.1.47,
4.1.10
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