Daily rear axle lock-out test procedure, P7.0 – JLG TF6-42 (9150-4003) Operator Manual User Manual

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DAILY REAR AXLE LOCK-OUT TEST PROCEDURE

TESTING REAR AXLE LOCKING SYSTEM (perform daily test)

The TF6-42 is equipped with a rear axle locking system for use while in work

platform mode. In this mode, when the boom is raised above 50 degrees, a

cylinder at the rear will lock, preventing oscillation of the rear axle. With the

boom below this angle the cylinder will allow the rear axle to oscillate freely.

When the machine is in material handler mode, the rear axle cannot be locked,

the rear axle will always oscillate freely.

After attaching the work platform and connecting the electrical cables, the

work platform mode should be checked to ensure proper operation of the rear

axle stabilization locking system.

Checking the rear axle locking system in work platform mode

Perform the following check from the work platform. No material, equipment,

or personnel other than the operator should be on the platform during the

performance of this test. This test will require the use of an assistant on the

ground.

1.)

Position Control Station Selector Key switch to Platform.

2.)

Start the machine from the platform. Raise the boom to approximately

zero degrees (horizontal) boom angle.

3.)

Locate an eight inch curb, and drive the machine’s left front wheel up

on the curb, leaving all other wheels off the curb.

4.)

Level the machine by operating the Sway function. No wheel should

leave the ground.

5.)

Back the left front wheel off the curb. Again, no wheel should leave the

ground.

6.)

Drive the left front wheel back up on the curb, and release the drive

controller. Use the sway function to level the machine.

7.)

While keeping clear of the rear wheels, have an assistant check that

the red LED on the proximity switch at the right rear of the machine

is “glowing”. Have the assistant disconnect the proximity switch from

the wire harness. The red LED should be “OFF” (see figure 7-1).

8.)

Back the left front wheel off the curb. The rear axle should be locked

and one wheel should be off the ground. Set the park brake.

9.)

Again, staying clear of wheels, have the assistant reconnect the

proximity switch to the wire harness. The raised wheel should

immediately return to the ground.

10.)

If the machine has passed all of these checks, place the machine on

level ground, set the park brake and raise the boom above 50 degrees.

11.)

Have the assistant check that the red LED on the proximity switch at

the right rear of the machine is “OFF”.

P7.0

Do not raise boom above 5 degrees

for steps 1 through 9 of this check.

WARNING

Should the machine fail any part of
this check, immediately discontinue

the checking process. Do not use

the machine. Place a “DO NOT
OPERATE” tag on the machine, and

have it repaired.

WARNING

Figure 7-1

Proximity

Switch