USMOWER QA60, Руководство оператора

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Installa
tion
Before starting the operator should read and understand
the owner/operation manual for the parent implement to de-
termine the proper procedure for turning on the auxiliary
hydraulics to run the mower.
Attaching Mower to Skid Steer
Securely attach the QA60 or QA72 mower in the same manner you would attach a
bucket or other Skid Steer attachment. Confirm that the locking mechanism is
properly engaged.
Carefully clean the Hydraulic quick couplers before making connections. Dirt
quickly damages the hydraulic system. Always cover or connect couplers together
when not in use.
Connect supply, return and case drain lines. Confirm that the hydraulic quick cou-
plers are fully engaged and locked by turning the collars. Ensure that limiting
straps are connected to skid steer arms.
Check with your power units manuals on how best to release the pressure in the
auxiliary lines for easy coupling to the connectors.
Activate the auxiliary hydraulic circuit with the cutter head raised off the ground.
Case drain line, what and why is it needed?
The case drain protects the mower motor shaft seal from excessive pressure. Mo-
tor shaft seals are usually rated to 100 psi for brief periods or less than about
50 PSI continuously. High pressure oil from the gear section travels between the
shaft and its sleeve bearing to an area behind the shaft seal. This flow continues
on through the return line by way of an internal check valve or through an exter-
nal case drain. In most compact equipment return line pressure is high enough to
cause either abrupt seal blowout (150+ psi) or early failure of the motor shaft.
Higher pressure seals are available, but are not always reliable and cause other
problems as well.
The best solution is a dedicated case drain. Your machine may have an internal or
external case drain system that can accommodate the small volume of gear motor
case flow. Contact your vehicle dealer or manufacturer for technical details.
Motor shaft seals are not covered under warranty if case drain is
not properly installed or fails. Make sure case drain line couplers
are properly connected.