JLG 4017PS Service Manual - Manual (Page 199)

9-41 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Electrical System
9.14 PLATFORM INTERLOCK CHECKS
To check the platform interlock, turn the ignition key to
position I and be sure the following are set:
• Park brake is applied
• Transmission control lever is in the (N) NEUTRAL
position
• Machine outriggers are fully lowered
• Machine is level
• Quick Coupler locking pin is installed
It is now possible to check the platform interlock.
1. Disengage the park brake. Turn the ignition key to the
platform position. The machine should not engage in
platform mode. Reapply the park brake.
2. Shift the transmission control lever into
(F) FORWARD or (R) REVERSE. The machine
should not engage in platform mode. Shift the
transmission control back to the (N) NEUTRAL
position.
3. Raise the outriggers. The machine should not engage
in platform mode. Lower the outriggers.
4. Unlevel the machine. The machine should not engage
in platform mode. Level the machine.
5. Remove the quick coupler locking pin from the boom
head. The machine should not engage in platform
mode. Install the quick coupler locking pin.
With all the above conditions met for the machine to go into
platform mode, turn the ignition key to the platform position.
1. Disengage the park brake. The machine should
disable platform functions. Engage the park brake.
2. Shift the transmission control lever to (F) FORWARD
or (R) REVERSE. The machine should not drive in
platform mode. Shift the machine to (N) NEUTRAL.
3. Raise the outriggers. The outriggers should NOT raise
in platform mode.
4. Unlevel the machine. The machine should disable
platform functions if the machine is not level. Level the
machine.
5. Have an assistant remove the quick coupler locking
pin. The machine should disable platform functions.
9.15 PLATFORM LOAD SYSTEM CHECK
Verify proper operation of the Load Sensing System (LSS).
1. Verify platform interlock works properly. Refer to
Section 9.14, “Platform Interlock Checks.”
2. Apply park brake, shift transmission control lever into
(N) NEUTRAL, fully retract and lower the boom below
10 degrees.
3. Fully lower outriggers, lifting the front tires and ensure
that the machine is level.
4. Shut off engine and rotate key to Platform position.
5. Remove key and ensure power/emergency stop
switch is pulled up.
6. Exit cab and lock door.
7. Load a total weight of 450-540 kg (992-1,190 lb)
including the operator weight into the platform and
secure.
8. Enter platform, push and hold start switch. Release
start switch after engine starts.
9. The platform overload indicator should be illuminated.
10. Hold trigger on the function enable control joystick.
11. Actuate the boom joystick.
12. If the LSS will not allow any platform movement, the
system is working properly.
13. If platform moves the LSS is not working properly.
14. STOP and lower the platform. Shut engine off.
15. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
16. Contact the local JLG dealer for assistance.
WARNING
While an assistant raises the boom. DO NOT leave
the cab unattended.