11 base frame components troubleshooting, Caster wheels not operating freely, Check for these obvious conditions first – JLG 20VP (3120728) Service Manual User Manual
Page 102: Is machine operating on a smooth, level surface, Table 3-32. caster wheels not operating freely, Pot hole protection (php) bars will not set, Base frame components troubleshooting -42, Caster wheels not operating freely -42, Pot hole protection (php) bars will not set -42
SECTION 3 - TROUBLESHOOTING
3-42
– 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
—