Elliott Traffic Safety Service L60, Operator'S Manual

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Component Evaluation EEC-0131 V1.1
Component Evaluation
Cylinders
1. Excessive fluid on cylinder rods, or fluid puddles under the cylinders indicates the
rod seal is worn. Rebuild the cylinders by replacing the rod seal and rod dirt
wiper.
2. Cylinder creeping indicates one of the following problems:
A. Worn piston seals allow oil to leak around the piston. Rebuild the cylinders by
replacing the piston seals.
B. Fluid leaks through the holding valve. If the creeping cylinder is an outrigger
cylinder, the pilot-operated check valve must be replaced. If the cylinder is a
lift, boom extension or platform cylinder, the problem may be corrected by
adjusting the counterbalance valve. Contact your local Elliott distributer or
service center for this adjustment.
3. Fluid leakage between the cylinder case and head indicates a worn O-ring seal.
Rebuild the cylinders by replacing the O-rings.
CAUTION: All hydraulic equipment will wear rapidly if dirt or abrasive materials
are allowed to enter the system. Ensure all filters are properly maintained and
serviced.
Electrical
1. The Elliott HiReach electrical system power source is in the truck battery and
alternator. Standard automotive testing procedures should be applied to the
HiReach part of the total electrical system.
2. All power to the HiReach is from the battery through the master switch relay. The
relay is controlled by the truck ignition power through the HiReach master switch,
and is located in the truck cab. A pilot light indicates the switch is in the ON
position, and power is being supplied to the HiReach remote control circuits.
3. Referencing the schematics and circuit drawings for standard continuity and
voltage testing procedures will simplify maintenance and repair.