Lull 944E-42 Service Manual - Manual (Page 102)

Boom
3.54 Model 644E-42/944E-42 Rev. 6/04
8. Lift/Lower cylinder pivot pin
noise and/or wear.
1. Insufficient lubrication.
2. Worn self-aligning bearing(s).
1. Lubricate at regular intervals.
(Refer to the appropriate
Owners/Operators Manual for
lubrication information.) Replace
worn pins as needed.
2. Replace bearing(s) and
lubricate at regular intervals.
(Refer to the appropriate
Operators Manual for lubrication
information.)
9. Boom noise during extension. 1. Chain binding.
2. Wear pads worn.
1. Refer to (Refer to Section 3.4.5,
“Boom Extend and Retract
Chains Removal and
Replacement.”)
2. Check wear pads and replace
as needed. (Refer to Section
3.5.1, “Boom Wear Pad
Replacement.”)
10. Rapid boom pad wear. 1. Incorrect wear pad gap.
2. Rapid cycle times with heavy
loads.
3. Contaminated, corroded or
rusted wear pad sliding
surfaces.
4. Operating in extremely dusty/
abrasive conditions.
1. Check wear pad gaps and
correct as needed. (Refer to
Section 3.5.1, “Boom Wear Pad
Replacement.”)
2. Reduce cycle times.
3. Remove contamination and/or
corrosion from wear pad sliding
surfaces and lubricate. (Refer to
Section 3.5.2, “Boom Wear Pad
Lubrication.”) If the surfaces
cannot be reconditioned,
replace the boom section(s).
4. Clean equipment frequently.
Boom Troubleshooting (Continued)
Problem Cause Remedy