Service Manual Owner's manual

SECTION 3 - TROUBLESHOOTING

3-38 – JLG Lift – 3120728

3.11 BASE FRAME COMPONENTS TROUBLESHOOTING

Caster Wheels Not Operating Freely

Check For These Obvious Conditions First:

• Is machine operating on a smooth, level surface?

Pot Hole Protection (PHP) Bars Will Not Set

Check For These Obvious Conditions First:

• Obstruction under pot hole bar on either side of machine.

• Obstruction around the actuator assembly at the base of the mast.

Table 3-32. Caster Wheels Not Operating Freely.

STEP ACTION SPEC YES NO

1. Is the caster rotating freely?

—Go to Step 2

Lubricate or

Replace Caster

Housing

2. Is the wheel spinning freely?

— Go toStep 3

Lubricate or

Replace Wheel

3. Is debris stuck in the plastic wheel?

—

Remove Debris or

Replace Wheel

—

Table 3-33. Pot Hole Protection (PHP) Bars Will Not Set.

STEP ACTION SPEC YES NO

1. Check the actuator cables for adjustment or damage. — Adjust or Replace Go to Step 2

2. Check the PHP limit switch(s) at both sides of the machine for dam-

age, adjustment and for continuity through switch to ground when

bars are down.

—

Replace, Adjust

or Repair Wiring

—