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18-ENG
D26998
SERVICE AND ADJUSTMENTS
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE PER-
FORMED BY TRAINED SERVICE TECHNICIAN.
Before servicing:
• Stop engine.
• Bleed tank of pressure.
• Allow the air compressor to cool.
Safety Valve-Inspection and Replacement
If the safety valve does not work properly, over-pressuriza-
tion can occur and cause air tank rupture or explosion.
Daily pull the ring on the safety valve and make sure it operates freely. If
the valve is stuck or does not operate smoothly, it must be replaced with
the same type of valve having an identical pressure rating.
To Remove Safety Valve:
1. Make sure the air compressor
unit is off and disconnect the
spark plug wire.
2. Open the outlet valve and allow
all air to bleed from the tank.
Monitor tank pressure gauge as
tank is emptied.
3. When tank is empty, remove
safety valve (A) from manifold.
Refer to Figure.
To Install New Safety Valve:
1. Verify new safety valve is the
correct pressure rating for your air compressor.
2. Verify threads for safety valve in manifold are clean.
3. Apply thread sealant to the threads of new safety valve.
4. Install new valve and hand-tighten.
5. Tighten nut to secure safety valve to manifold. Do not overtighten.
6. Reconnect spark plug wire to engine.
7. Perform the Daily Start Up Checklist.
A