VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: www.kb.vmacair.com
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Adding Oil to the System
The VMAC supplied and approved compressor oil must be used in
this system. Failure to use this special oil will result in damage to
the compressor and will void warranty.
Do not overfill the system. Overfilling the system with oil can flood
the sight glass window and make the system appear empty.
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Lower the vehicle from the axle-stands.
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Ensure the vehicle is parked on level ground.
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Remove the oil filter from the AOST and discard the cardboard warning tag.
Apply a light film of compressor oil to the filter gasket and thread the filter
onto the AOST until the gasket makes contact. Tighten the filter an additional
3/4 to 1 turn after the gasket contacts the base.
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Remove the cap from the oil-fill port located on the Inlet valve (Figure 111).
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Fill the system with the supplied oil (when dry, the system will take
approximately 9 L (9.5 qt) of oil). Rotate the compressor clutch by hand while
adding oil to speed the process.
Do not
use power tools to rotate the clutch.
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Allow a few minutes for the oil to drain into the AOST. Check the level at
the sight glass at the front of the AOST. Continue adding oil until the level is
correct.
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Replace the oil fill cap and tighten.
Figure 111 — Oil fill location
Oil fill
cap
