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Spray System
Maintenance
Inspecting the Hoses
Every 200 hours, examine each hose in the spray
system for cracks, leaks or other damage. At the
same time, inspect the connections and fittings for
similar damage. Replace any hoses and fittings if
damaged.
Pump Maintenance
Inspecting the Pump
Every 400 hours and/or yearly, 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.
Changing the Pump Drive Gearbox
Fluid
Change the pump drive gearbox every 400 hours.
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 71).
Figure 71
1. Pump drive gearbox
2. Fill tube
3. Remove the fill plug and drain plug (Figure 71),
allowing the oil to drain into the pan.
4. Install and tighten the drain plug when the
fluid stops draining.
5. Add approximately 1 quart (1 L) of Mobil SHC
634 Synthetic Lubricant to the fill tube.
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.
6. Install the fill plug.
Adjusting the Boom
Actuator
Inspect the actuator hydraulic oil for air bubbles
every 400 hours.
1. Position the sprayer on a level surface, lower
the booms into the spray position.
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 manually) while observing
57
3. Drain plug
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