Changing the Pump Drive Gearbox
Fluid
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. Place a pan under the drain plug on the pump drive
gear box (Figure 66).
1. Pump drive gearbox
2. Fill tube
3. Remove the fill plug and drain plug (Figure 66),
allowing the oil to drain into the pan.
G010597
Figure 65
Figure 66
3. Drain plug
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.
54