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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Tighten all fittings on the AOST.
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Remove the cap plug used to cover the oil filter port on the AOST.
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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 plug from the oil-fill hose located in the engine bay on the
passenger side of the engine (Figure 35).
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Using a funnel, fill the AOST with 4 L to 5 L (4.2 qt to 5.2 qt) of the supplied oil.
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Replace the oil fill cap and tighten.
Figure 35 — Oil fill location
Oil fill
cap
The actual oil level can be difficult to determine in the AOST sight
glass until the system has been run. Final oil level will be checked
(and can be corrected) during the final testing chapter.
