Using The Hydraulic Control - Toro 07383 Operator's Manual

Using the Hydraulic Control

The hydraulic control supplies hydraulic power from the
machine pump whenever the engine runs. The power can be
used through the quick couplers at the rear of the machine.
CAUTION
Hydraulic fluid escaping under pressure can have
sufficient force to penetrate skin and do serious
damage. Care must be used when connecting or
disconnecting hydraulic quick couplers. Shut off
the engine, apply the parking brake, lower the
attachment, and place the remote hydraulic valve in
the float detent position to relieve hydraulic pressure
before connecting or disconnecting quick couplers.
Important: If multiple machines use the same
attachment, cross contamination of the transmission
fluid may occur. Change the transmission fluid more
frequently
Using the Hydraulic-Bed-Lift Lever to
Control Hydraulic Attachments
•
O Position
FF
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.
•
R (Quick Coupler "A" Position)
AISE
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, O
1. Quick coupler A position
•
L (Quick Coupler B Position)
OWER
position.
FF
Figure 30
2. 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.
•
O Position
N
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
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 O
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 the hydraulic-fluid level after
installation of an attachment. Check the operation
of the attachment by cycling the attachment several
times to purge air from the system, then check
hydraulic-fluid level again. The attachment cylinder
will slightly affect the fluid level in the transaxle.
Operating the vehicle with a 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 O
position.
32
position causes the
N
N