JLG G6-42A Service Manual User Manual
Page 74
Boom
3-36
G6-42A, G9-43A, G10-43A
8. Rapid boom pad wear.
1. Incorrect wear pad gap.
1. Check wear pad gaps and
correct as needed. Refer to
Section 3.10, “Boom Wear
Pads.”
2. Rapid cycle times with heavy
loads.
2. Reduce cycle times.
3. Contaminated, corroded or
rusted wear pad sliding
surfaces.
3. Remove contamination and/or
corrosion from wear pad sliding
surfaces and lubricate. If the
surfaces cannot be
reconditioned, replace the boom
section(s).
4. Operating in extremely dusty/
abrasive conditions.
4. Clean equipment frequently.
9. Auxiliary hydraulics will not
operate.
1. Auxiliary hydraulic system not
operating properly.
1. Refer to Section 8.4, “Hydraulic
10. Excessive chain wear.
1. Improper chain adjustment.
1. Adjust to correct tension. Refer
to Section 3.8, “Boom
Adjustments.”—Replace chains
as needed.
2. Chain sheave(s) not properly
lubricated.
2. Lubricate chain sheave. (Refer
to Section 2.6, “Service and
Maintenance Schedule.”
3. Chain sheave(s) not rotating
freely.
3. Lubricate chain sheave. Refer
to Section 2.6, “Service and
Maintenance Schedule.” Repair
or replace chain sheave(s) as
needed.
4. Improper chain lubrication.
4. Lubricate at regular intervals.
Refer to Section 2.6, “Service
and Maintenance Schedule.”
Replace chains as needed.
Problem
Cause
Remedy