5. MAINTENANCE REM - GRAINVAC VR12
5.4. M
AINTENANCE PROCEDURES
66 9000-00-0042 R3
5.4.11. Rotor Bearing Cartridge Air Breather – Inspect and Clean
Important: In clean conditions, the air breather plug should be cleaned every 100 hours of
operation, or annually at a minimum. In dusty, dirty operating conditions, the plug must
be checked and cleaned as often as it is necessary to keep the plug clean and open.
1. Remove the air breather plug (see Figure 5.17).
2. Wash the plug with solvent.
3. Blow compressed air through the air breather plug passage to ensure that it is open.
4. Reinstall and tighten the air breather plug.
5.4.12. Rotor Bearing Cartridge Oil Bath – Replacing Oil
Note: Rotor bearing cartridge oil replacement requires approximately 5 fl oz (0.15 L) of SAE
75W90 synthetic gear oil.
1. Place the VR12 on a flat, even surface that will help ensure that the unit is as level
as possible.
2. Remove the hoses from the hose racks.
3. Remove the rear upper guard to gain access to the bearing cartridge.
4. Remove the oil level check plug on the side and the breather plug from the top of the
bearing cartridge (see Figure 5.17).
5. Use a plastic syringe and hose inserted into the breather plug hole to suction the oil
out of the bearing cartridge.
6. Inspect the air breather plug, and clean if necessary (Section 5.4.2. PTO –
Lubrication & Cleaning on page 54).
7. Slowly fill the bearing cartridge with approximately 5 fluid ounces of SAE 75W90
synthetic gear oil. Stop filling when oil begins to flow out of the oil level check plug
hole.
8. Re-install the oil level check plug and the air breather plug.
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