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Air starting valve overhaul

Checking- attach service air on top of the valve and check for a lift atleast 15-20mm. And on closing the air valves must be shut instantly.
Dismantling- shut air supply- attach two eyebolts and dismount by using a lifting wire after
unscrewing holding bolts. keep the starting air valve on vice with soft jaws. remove top cover. remove two bolts attaching the piston to the spindle. the piston will come out due to spring force. remove the valve and spindle through the bottom.lap valve lid and valve seat properly and mount back all parts.
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