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37 Troubleshooting 37
Chapter 9 - Troubleshooting
This chapter will list a number of potential problems that may occur while
operating the Hooklift. Most problems are easily solved using the solutions
portion of this chapter. If problems persist, please contact
Customer Service at Stellar Industries 1-800-321-3741.
Contact Customer Service at Stellar Industries: 1-800-321-3741
Problem: Hooklift will not operate or oper-
ates slow.
Solutions:
• Make sure the PTO is engaged.
• Make sure the control lever/cable assem-
bly or air actuator are shifting the spool
valves on the valve section
• Make sure that the hydraulic pump is
operating at its rated flow or GPMs under
load. Check the flow by using a flow
meter to determine the GPMs. To find the
proper flow the equipment is to operate
at, see Chapter 6 of the Hooklift Owner’s
Manual.
• Make sure the relief pressure is properly
set per the specifications page of the
hooklift owners manual.
• Make sure the spool valves on the valve
bank are adjusted and operating smooth-
ly.
Problem: Hydraulic system gets extremely
hot.
Solutions:
• Make sure the hydraulic filter has been
changed per the maintenance page of
the Hooklift Owner’s Manual.
• Make sure the filter strainer of the
hydraulic reservoir is not plugged.
• Make sure that the hydraulic pump is
operating at its rated flow or GPMs.
• Make sure the relief pressure is set proper-
ly. See the Table on page 20 of Chapter
6: Installation for proper setting.
Problem: Hooklift will not lift or pickup a
loaded container.
Solutions:
• Make sure the container contents are
evenly distributed.
• Make sure the container and its load
does not exceed the rated capacity.
• Make sure the relief pressure is properly
set per the Table on page 20 of Chapter
6: Installation for proper setting.
• Make sure the hydraulic pump is operat-
ing at its rated flow or GPMs. See Chapter
4: Specifications.
• Make sure that the container is not fixed
to the ground or frozen down.
Problem: Hooklift binds at pivot points.
Solutions:
• Make sure the pivot points are lubricated.
• Make sure pivot pins are not seized to the
bushing.
• Make sure the weldments or pins are not
misaligned or bent.
Problem: Cylinders drift upward or down-
ward while hydraulics are dis-engaged.
Solutions:
• Make sure valve spools are shifting to the
neutral position.
• Possible contamination keeping the hold-
ing valve open.
• Possible internal piston seals rolled or
damaged.