JLG 4017RS Service Manual - Manual (Page 83)

3-43 3614RS, 4017RS
Boom
6. Drooping chain, or jerky boom
extend or retract functions.
1. Chain(s) tension not properly
adjusted.
1. Adjust chain(s).
2. Chain(s) stretched or binding. 2. Replace chains as needed. Refer to
Section 3.7, “Boom Sections
Adjustment - 3614RS.”
3. Wear pads loose, contaminated,
excessively worn or damaged.
3. Replace wear pad. Refer to Section
3.16, “Boom Wear Pads.”
4. Contaminated, corroded or rusted
wear pad sliding surfaces.
4. Remove contamination and/or
corrosion from wear pad sliding
surfaces and lubricate. If the
surfaces cannot be reconditioned,
replace the boom section(s).
5. Extend/Retract hydraulic system
not operating properly.
5. Refer to Section 8.5, “Hydraulic
Circuits.”
6. Damaged boom section. 6. Replace the damaged boom
section.
7. Excessive Lift/Lower cylinder
pivot pin noise and/or wear.
1. Insufficient lubrication. 1. Lubricate at regular intervals.
Refer to Section 2.6, “Service and
Maintenance Schedules.” Replace
worn pins as needed. Refer to
Section 8.10.1, “General Cylinder
Removal Instructions.”
2. Worn self-aligning bushing(s). 2. Replace bushing(s) and lubricate
at regular intervals. Refer to
Section 2.7, “Lubrication
Schedule.”
8. Rapid boom pad wear. 1. Incorrect wear pad gap. 1. Check wear pad gaps and correct
as needed. Refer to Section 3.16,
“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 , “Running H/F 1.”
Problem Possible Causes Remedy