Swing Left Function Inoperative; Swing Right Function Inoperative - JLG T350 Troubleshooting Manual

1.17 SWING LEFT FUNCTION INOPERATIVE

Step Pretest Instructions
1.17.1
1.17.2 Engage enable and swing left
switch
1.17.3 Install a 0 to 5000 PSI (345
bar) pressure gauge at the
manifold G port
1.17.4 Plumb a 0 to 5000 PSI (345
bar) pressure gauge into the
manifold P port
1.17.5 Plumb a 0 to 5000 PSI (345
bar) pressure gauge into the
hose from the swing motor.

1.18 SWING RIGHT FUNCTION INOPERATIVE

Step Pretest Instructions
1.18.1
1.18.2 Engage enable and swing right
switch
1.18.3 Install a 0 to 5000 PSI (345
bar) pressure gauge at the
manifold G port
1.18.4 Plumb a 0 to 5000 PSI (345
bar) pressure gauge into the
manifold P port
1.18.5 Plumb a 0 to 5000 PSI (345
bar) pressure gauge into the
hose from the swing motor
cylinder
3121203
Test
Basic check of likely causes
DC - Is pump motor running?
Gas - Is engine running at high
idle
Engage the enable and swing
left switch. Check the pres-
sure.
Engage the enable and swing
left switch. Check pressure at
manifold P port
Check pressure at the swing
motor while activating swing
left at ground controls
Test
Basic check of likely causes
DC - Is pump motor running?
Gas - Is engine running at high
idle
Engage the enable and swing
right switch. Check the pres-
sure.
Engage the enable and swing
right switch. Check pressure at
manifold P port
Check pressure at the swing
motor while activating swing
right at ground controls
T350 T500J
SECTION 1 - TROUBLESHOOTING BY FUNCTION
Result
Yes
No
Yes
No
Above Min. Swing Left Pressure
psi (bar)
Below Min. Swing Left Pressure
psi (bar)
Above Min. Swing Left Pressure
psi (bar)
Below Min. Swing Left Pressure
psi (bar)
Above Min. Swing Left Pressure
psi (bar)
Below Min. Swing Left Pressure
psi (bar)
Result
Yes
No
Yes
No
Above Min. Swing Right Pressure
psi (bar)
Below Min. Swing Right Pressure
psi (bar)
Above Min. Swing Right Pressure
psi (bar)
Below Min. Swing Right Pressure
psi (bar)
Above Min. Swing Right Pressure
psi (bar)
Below Min. Swing Right Pressure
psi (bar)
Corrective Action
Possible Causes: 4.1.32, 4.1.33,
4.1.37
Go to step 1.17.3
See 1.2 Pump Motor Will Not Operate -
DC Powered Models
Go to step 1.17.3
See 1.8 Engine High Idle Inoperative -
Engine Models
Go to step 1.17.5
Go to step 1.17.4
Possible Causes: 4.1.38, 4.1.45,
4.1.74, 4.1.40, 4.1.10, 4.1.43
Possible Causes: 4.1.10, 4.1.46,
4.1.47, 4.1.74, 4.1.45, 4.1.39
Possible Causes: 4.1.49, 4.1.48,
4.1.41
Possible Causes: 4.1.42, 4.1.53
Corrective Action
Possible Causes: 4.1.32, 4.1.33,
4.1.37
Go to step 1.18.3
See 1.2 Pump Motor Will Not Operate -
DC Powered Models
Go to step 1.18.3
See 1.8 Engine High Idle Inoperative -
Engine Models
Go to step 1.18.5
Go to step 1.18.4
Possible Causes: 4.1.38, 4.1.45,
4.1.74, 4.1.40, 4.1.10, 4.1.43
Possible Causes: 4.1.10, 4.1.46,
4.1.47, 4.1.74, 4.1.45, 4.1.39
Possible Causes: 4.1.49, 4.1.48,
4.1.41
Possible Causes: 4.1.42, 4.1.52
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