Emergency Manual Operation Of The Boom Actuators; Inspecting The Nylon Pivot Bushings - Toro 41198 Multi-Pro 1250 Operator's Manual

If the actuator rod exhibits an axial movement (travels
into or out of the cylinder) greater than 0.085-0.100 inch
(2.16-2.54 mm), you may wish to bleed the air from the
hydraulic oil.
Refer to the Service Manual for instructions on how to
bleed air from the actuators or contact an Authorized
Toro Service Distributor.
Emergency Manual Operation
of the Boom Actuators
Note: Determine the left and right sides of the machine
from the normal operating position.
DANGER
Use of the manual relief valve may cause the boom
to move suddenly and cause injury to you or others.
• Take caution and adjust the manual relief valve
slowly.
• Ensure the surrounding area is clear and no one
is inside the operating range of the boom.
CAUTION
Adjusting the manual relief valve with electrical
power present could cause the actuator operate
irregularly and cause injury to you or others.
Do not use the manual relief valve while electrical
power is being supplied to the actuator.
In case of an emergency such that the boom must be
moved and no 12V DC power source is available, the
manual relief valve can be used to relieve pressure within
the actuator and allow the booms to be moved manually.
Important: The manual valve must not be loosened
more than 4 turns. Turning the valve more than 4
turns may cause the valve to come off completely
allowing hydraulic oil to spill out.
1. Locate the manual relief valve on the actuator for
each boom. The manual relief valve is the smaller
valve and is only on one side of the actuator body
(Figure 71).
1. Actuator, right boom
Note: Due to the opposing orientation of actuators
in respect to each other the manual relief valve is on
the forward face of the left boom actuator and the
rear face of the right boom actuator.
2. Use a hexagonal wrench to loosen the manual relief
valve no more than 2-3 turns. The cylinder should
start stroking manually or by external pressure at this
time.
3. Once the original position of the actuator is
recovered, close the manual relief valve. Torque the
valve to 1.1-2.1 ft-lb (1.5-2.9 N-m).
Inspecting the Nylon Pivot
Bushings
Service Interval: Every 400 hours/Yearly (whichever
comes first)
1. Position the sprayer on a level surface, set the parking
brake, stop the pump, stop the engine, and remove
the ignition key.
2. Extend the booms to the spray position and support
the booms using stands or straps from a lift.
3. With the weight of the boom supported, remove
the bolt and nut securing the pivot pin to the boom
assembly (Figure 72). Remove the pivot pin.
57
Figure 71
2. Manual relief valve