61Troubleshooting 61
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 operates slow.
Solutions:
• Make sure the PTO is engaged.
• Make sur
e the control lever/cable assembly 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 smoothly.
Problem: Lift cylinder operates, but the tilt cylinder
operates slow or does not operate at all.
Solutions:
• Make sure the rotary valve arm is properly adjust-
ed. See Rotary Valve Drawing in the Installation
Chapter of this manual.
• Make sure the rotary valve arm is not damaged or
has become disconnected.
P
roblem: Hydraulic system gets extremely hot.
Solutions:
• Make sure the hydraulic filter has been changed
per the maintenance page of the Hooklift Owner’s
M
anual.
• Make sure the filter strainer of the hydraulic reser-
voir is not plugged.
• Make sure that the hydraulic pump is operating at
its rated flow or GPMs.
• Make sure the relief pressure is set properly. See
Table 1.1 of Chapter 6: Installation for proper setting.
Problem: Hooklift will not lift or pickup a loaded con-
tainer.
Solutions:
• Make sure the container contents are evenly dis-
tributed.
• Make sur
e the container and its load does not
exceed the rated capacity.
• Make sure the relief pressure is properly set per
Table 1.1 in the Installation Chapter of this manual.
• Make sure the hydraulic pump is operating 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: Dump weldment lifts upward while picking
up a container.
Solutions:
• Make sure the rear hooklift rollers spin freely and
smoothly.
• Make sure the body hold down brackets are not
wor
n or bent.
Problem: Tab alarm sounds off inside chassis cab.
Solutions:
• Break away tabs on dump weldment have broken
loose. Re-install break away tabs using a Grade 5
5⁄16” bolt.
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 sur
e the weldments or pins ar
e not mis-
aligned or bent.
Problem: Cylinders drift upward or downward while
hydraulics are dis-engaged.
Solutions:
• Make sure valve spools are shifting to three neutral
position.
• Possible contamination keeping the holding valve
open.
• Possible internal piston seals rolled or damaged.
To Next Page
Loading...