SkyTrak 6042 Service Manual - Manual (Page 118)

Boom
3.72 Model 6042 Legacy Origin 7/02
3. Boom will not raise or lower. 1. Broken hydraulic hoses or tubes
and/or connection leaks.
2. Lift/lower hydraulic system not
operating properly.
3. Faulty lift/lower cylinder.
4. Seized boom pivot pin bearing.
1. Locate break, replace hose(s)
or tube(s), tighten connections.
2. Refer to Section 8.8, “Hydraulic
Circuits and Troubleshooting.”
3. Repair cylinder. (Refer to Section
8.13.7, “Lift/Lower Cylinder.”)
4. Replace bearing.
4. Boom shifts to right or left
when extending.
1. Boom pivot pin improperly
shimmed.
2. Incorrect wear pad gap or
shimming, or wear pads
excessively worn.
1. Re-shim the boom to a maximum
total gap of .10" (2.5 mm) with
shims distributed evenly on both
sides of the boom pivot pin.
2. Shim wear pads to correct gap.
Replace wear pads as needed.
(Refer to Section 3.5.1, “Boom
Wear Pad Replacement.”)
5. Excessive boom pivot pin
noise and/or wear.
1. Insufficient lubrication.
2. Worn bearing(s).
1. Lubricate at regular intervals.
Replace worn pins as needed.
2. Replace bearing(s) and
lubricate at regular intervals.
6. Excessive slave cylinder
pivot pin noise and/or wear.
1. Insufficient lubrication.
2. Worn bearing(s).
1. Lubricate at regular intervals.
Replace worn pins as needed.
2. Replace bearing(s) and
lubricate at regular intervals.
7. Excessive lift/lower cylinder
pivot pin noise and/or wear.
1. Insufficient lubrication.
2. Worn self-aligning bearing(s).
1. Lubricate at regular intervals.
Replace worn pins as needed.
2. Replace bearing(s) and
lubricate at regular intervals.
8. 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.
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.
9. Auxiliary hydraulics will not
operate.
1. Auxiliary hydraulic system not
operating properly.
1. Refer to Section 8.8, “Hydraulic
Circuits and Troubleshooting.”
Boom Troubleshooting (Continued)
Problem Cause Remedy