Inspecting The Nylon Pivot Bushings - Toro 41177 Operator's Manual

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 74).
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 75). Remove the pivot pin.
Figure 74
2. Manual relief valve
1
2
4
1. Pivot pin
2. Bolt
3. Nut
4. Remove the boom and pivot bracket assembly from
the center frame to access the nylon bushings.
5. Remove and inspect the nylon bushings from the
front and back sides of the pivot bracket (Figure 75).
Replace any damaged bushings.
6. Place a small amount of oil on the nylon bushings
and install them into pivot bracket.
7. Install the boom and pivot bracket assembly into the
center frame, aligning the openings (Figure 75).
8. Install the pivot pin and secure it with the bolt and
nut removed previously.
Repeat the procedure for each boom.
58
4
5
3
Figure 75
4. Nylon bushing
5. Pivot bracket
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