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Pump Maintenance
Inspecting the Pump
Service Interval: Every 400 hours/Yearly (whichever comes
first)—Inspect the pump diaphragm and
replace if necessary. (see an Authorized
Toro Service Distributor)
Every 400 hours/Yearly (whichever comes
first)—Inspect the pressure dampener bladder and
replace if necessary. (see an Authorized Toro Service
Distributor)
Every 400 hours/Yearly (whichever comes
first)—Inspect the pump check valves and replace
if necessary. (see an Authorized Toro Service
Distributor)
Note: The following machine components are considered
parts subject to consumption through use unless found
defective and are not covered by the Warranty associated with
this machine.
Have an Authorized Toro Service Distributor check following
internal pump components for damage:
•
Pump diaphragm
•
Pressure dampener bladder
•
Pump check valves assemblies
Replace any components if necessary.
Adjusting the Air Pressure in Dampener
The air pressure in the dampener on the pump is set at 15 psi
(1 bar) by the manufacturer. The recommended pressure in
the dampener is 1/3 of the spraying pressure. If using a spray
pressure greater than 45 psi (3.1 bar) adjust the dampener
accordingly.
Figure 67
Changing the Pump Drive Gearbox
Fluid
Service Interval: Every 400 hours/Yearly (whichever comes
1. Position the sprayer on a level surface, set the parking
brake, stop the pump, stop the engine, and remove the
ignition key.
2. Place a pan under the drain plug on the pump drive
gear box (Figure 68).
1. Fill-level plug
2. Fill tube
3. Remove the fill-level plug and drain plug (Figure 68),
allowing the oil to drain into the pan.
4. Install and tighten the drain plug when the fluid stops
draining.
5. Locate gear box vent/fill hose extending up from the
gear box. Remove the cap from the hose.
6. Add approximately 18-20 ounces of Mobil SHC 634
Synthetic Lubricant to the fill tube or until the gear
lubricant begins to flow out of the fill-level port.
Important: Use only Mobil SHC 634 Synthetic
Lubricant or equivalent synthetic fluid in the gear
box. Non-synthetic oils may break down causing
damage to the pump gearbox.
7. Install the fill-level plug and vent/fill hose cap.
Adjusting the Boom Actuator
Service Interval: Every 400 hours—Check boom actuator
1. Position the sprayer on a level surface, lower the booms
into the spray position.
G010597
2. Set the parking brake, stop the pump, stop the engine,
and remove the ignition key
3. Attempt to lift the boom by applying a moderate
amount of pressure (just enough to lift the boom
54
first)
2
1
G013853
3
Figure 68
3. Drain plug
hydraulic oil for air bubbles.
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