Toro 07383 Operator's Manual page 29

return oil 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
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 oil 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 oil to quick coupler B except
that the lever is held in this position by a detent lever in
the control panel. This allows oil 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 On position causes the oil 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 oil 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 oil level. The attachment cylinder will
slightly affect transaxle oil level. Operation of vehicle
with low oil level can damage the pump, remote
hydraulics, power steering, and the vehicle transaxle.
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. Stop 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.
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.
Troubleshooting the Hydraulic Control
•
Difficulty in connecting or disconnecting quick couplers.
Pressure not relieved (Quick coupler under pressure).
•
Power steering hard
– Hydraulic oil level low
– Hydraulic oil hot
– Pump not operating
•
Hydraulic leaks
– Fittings loose
– Fitting missing o-ring
•
Attachment does not function
– Quick couplers not fully engaged
– Quick couplers are interchanged
•
Squealing noise
– Remote valve left in the On detent position causing
hydraulic oil to flow over the relief valve
– Belt loose
•
The engine will not start.
Hydraulic lever locked in forward position
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