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Using the Hydraulic-bed Lift Lever to
Control Hydraulic Attachments
•
Off Position
This is the normal position for the control valve when it
is not being used. In this position the work ports of the
control valve are blocked and any load will be held by the
check valves in both directions.
•
Raise (Quick Coupler "A" Position)
This is the position which will lift the bed, rear hitch
attachment or apply pressure to quick coupler A. This
also allows hydraulic fluid to return from quick coupler B
to flow back into the valve and then out to the reservoir.
This is a momentary position and when the lever is
released it spring returns to the center Off position.
Figure 29
1. Quick coupler A position
•
Lower (Quick Coupler B Position)
This position will lower the bed, rear hitch attachment,
or apply pressure to quick coupler B. This also allows
hydraulic fluid to return from quick coupler A to flow
back into the valve and then out to the reservoir. This is
a momentary position and when the lever is released it
spring returns to the center off position. Momentarily
holding and then releasing the control lever in this
position will provide hydraulic fluid flow to quick coupler
B which provides power down on the rear hitch. When
released, it will hold the down pressure on the hitch.
Important: If used with a hydraulic cylinder,
holding the control lever in the lower position causes
the hydraulic-fluid flow to go over a relief valve which
can damage the hydraulic system.
•
On Position
This position is similar to Lower (quick coupler B
position). It also directs hydraulic fluid to quick coupler
B except that the lever is held in this position by a
detent lever in the control panel. This allows hydraulic
fluid to flow continuously to equipment that uses a
2. Quick coupler B position
hydraulic motor. This position must only be used on
attachments with a hydraulic motor attached.
Important: If used with a hydraulic cylinder
or no attachment, the On position causes the
hydraulic-fluid flow to go over a relief valve which
can damage the hydraulic system. Use this position
only momentarily or with a motor attached.
Important: Check hydraulic-fluid level after
installation of an attachment. Check the operation
of the attachment by cycling the attachment several
times to purge air from system, then recheck
hydraulic-fluid level. The attachment cylinder will
slightly affect fluid level in the transaxle. Operation
of vehicle with low hydraulic-fluid level can damage
the pump, remote hydraulics, power steering, and
the vehicle transaxle.
Connecting the Quick Couplers
Important: Clean dirt from quick couplers before
connecting. Dirty couplers can introduce contamination
into the hydraulic system
1. Pull back the locking ring on the coupler.
2. Insert the hose nipple into the coupler until it snaps
into position.
Note: When attaching remote equipment to the quick
couplers, determine which side requires pressure, then attach
that hose to quick coupler B, which will have pressure when
the control lever is pushed forward or locked in the On
position.
Disconnecting the Quick Couplers
Note: With both the vehicle and attachment turned off,
move the lift lever back and forth to remove the system
pressure and ease the disconnection of the quick couplers.
1. Pull back the locking ring on the coupler.
2. Pull the hose firmly from the coupler.
Important: Clean and install the dust plug and
dust covers to the quick coupler ends when not
in use.
30
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