Crack-Vac Model 100G Manual
Chapter 6 Maintenance Instructions
©2020 by Crafco, Inc. All Rights Reserved
Maintenance Instructions 6-10
Step
Action
1
Turn the system on and allow it to reach full pressure.
2
Slow engine speed to idle and turn the ignition key to “OFF”
3
Listen for the pressurized air to blowdown through the muffler on the WHASP tank.
Blowdown should be completed in approximately 20 seconds.
4
If the muffler is showing signs of blockage, replace the muffler.
Pressure Relief Valve
Step
Action
1
Visually inspect the valve and ensure it is not corroded and that the vent holes are
not plugged.
2
Turn the system on and allow it to reach full system pressure.
3
Ensure that air does not leak out of the valve. Air leaking from the pressure relief
valve when system pressure is at or below 150 psi indicates that the spring in the
valve is worn and the valve must be replaced.
Coalescing Filter
Step
Action
1
Clean the WHASP tank around the coalescing filter to prevent contamination.
2
Remove the coalescing filter by turning it counterclockwise.
3
Clean the gasket sealing surface and inspect it for damage. The surface must be
free of old gasket material and smooth to ensure a good seal.
4
Apply a thin coat of compressor oil to the rubber gasket on the new coalescing
filter.
5
Spin the new filter onto the threaded nipple until the gasket contacts the sealing
surface on the tank, then tighten the filter an additional ¾ to 1 turn to seat the
gasket.
6
Start the engine and check for oil leaks. Allow the system to build pressure and
shutdown the system. Relieve all pressure from the system.
Table 6-5 Testing the Blowdown Muffler
The pressure relief valve is a regular service item and must be replaced every 1000 hours of
operation. Inspect the pressure relief valve for signs of corrosion or loss of functionality. Reference
Table 6-6 Testing the Pressure Relief Valve
Table 6-6 Testing the Pressure Relief Valve
The coalescing filter is a regular service item and must be replaced every 1000 hours of operation.
Reference
Table 6-7 Replacing the Coalescing Filter
Table 6-7 Replacing the Coalescing Filter
Summary of Contents for 60800N
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