134
Scheduled Maintenance
Vacuum Blower Drain Valve & Safety Plug
Changing the Gear Case Oil
Draining the gear case:
1. Make sure the waterblasting system is shut-
down with the truck in the service position and
on level ground.
2. Remove the safety plug at the oil drain ball
valve tting.
3. Attach a drain hose to the ball valve tting
and route the hose to a suitable waste oil
container capable of handling at least 2 quarts
(2.9 Liters) of oil.
4. Open the drain valve and drain the oil.
5. When draining is complete, close the valve and
insert the safety plug. Make sure the safety
plug is clean to avoid contamination. Tighten
the plug to specications.
Relling the gear case:
1. Clean the area around the breather plug on
the top of the gear case and remove the plug.
2. Make sure the drain valve is closed and the
safety plug is installed in the valve tting and
tightened.
3. Add the recommended amount and type of
gear oil to the gear case. Refer to the blower
manufacturer’s Operation and Maintenance
manual and/or the Maintenance Matrix in this
chapter for the correct quantity and type of
gear oil.
4. Verify the gear case oil level when lling is
complete following the instructions for check-
ing the oil level in the previous section of this
chapter.
5. Make sure the breather plug is clean and insert
the plug into the port. Tighten to specica-
tions.
6. Wipe up any spilled oil and properly dispose
of the waste oil and oil soaked rags.
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