VMAC
– Vehicle Mounted Air Compressors
VMAC Technical Support:
1-888-241-2289
VMAC Knowledge Base: www.kb.vmacair.com
43
Inspecting and Replacing the Blowdown Muffler
Read the
“Maintenance and Repair Safety” section prior to
performing any work on the system (beginning on Page 38).
Wear appropriate Personal Protective Equipment and follow
all industry standard safety practices.
The Blowdown Muffler is a regular service item and must be replaced every
400 hours or 1 year, whichever interval occurs first.
Visually inspect the blowdown muffler for evidence of corrosion or loss of
functionality. Ensure the muffler allows the blowdown to depressurize the
system. To test the blowdown system and muffler:
Turn the system on and allow it reach full system pressure (factory
setting 150 psi).
Turn the
ignition key switch to “OFF”.
Listen for the pressurized air to blowdown through the muffler on the
WHASP Tank. Blowdown should be completed in approximately 20
seconds.
If the muffler is showing signs of blockage, contact a local VMAC dealer
for a replacement.
A replacement blowdown muffler is included with the VMAC
400 hour service kit.
Figure 30
– Blowdown muffler (Shroud removed for clarity)
Blowdown muffler
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