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9-4 Filter/Regulator
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
1. Pressure is not regulated.
1. Opposite flow direction or opposite
installation of filter/regulator.
2. Foreign materials caught in valve seat.
1. Install piping or filter/regulator correctly as
shown in manual.
2. Remove the valve guide to clean the valve and
valve seat.
2. Set pressure does not return
to zero when pressure handle
is loosened.
1. Foreign materials caught in valve seat.
1. Remove the valve guide to clean the valve and
valve seat.
3. Large air resistance reduces
flow rate.
1. Clog of the element.
1. Clean the element.
4. Air leaks from the bonnet
exhaust port.
1. Diaphragm is damaged.
2. Foreign materials caught in valve seat.
3. Piston o-ring is damaged.
1. Replace the assembly.
2. Remove the valve guide to clean the valve and
valve seat.
3. Replace the piston o-ring or clean. Then grease
up the piston o-ring and sliding surface.
5. Air leaks between the bonnet
and the body.
1. Loosened bonnet.
2. Diaphragm is damaged.
1. Fasten the bonnet.
2. Replace the assembly.
6. Air leaks between the bowl
and the body.
1. Breakage of bowl o-ring.
1. Replace bowl o-ring. Grease up before
assembling.
7. Air leaks from the drainage cock. 1. Foreign matter caught in the valve of the
drain cock.
2. Breakage of the seating part of the drain
cock.
1. Open the drain cock for a few seconds.
2. Replace the bowl assembly.
8. No drainage when the drain
cock is opened.
1. Blockage of outlet of the drain cock due to
solid foreign matter.
1. Replace the bowl assembly.
9. Too much drain comes from
the piping of the outlet side.
1. Drain level reaches the baffle plate.
1. Open the drain cock for draining and replace the
element.
9-3 Lubricator
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
1. Oil fill level low.
1. Oil depleted in bowl.
1. Refill oil bowl to correct level using air motor oil.
2. Incorrect oil drip rate.
1. Drip rate valve not set properly.
2. Filter element clogged.
3. Steel supply lines clogged.
1. Set drip rate valve so that 1 drop of oil occurs
every 5-10 reamer cycles.
2. Remove bowl assembly and clean filter element.
3. Remove steel supply lines and clean using
compressed air. If damaged, replace steel lines.
3. Air leaks between the bowl
and the body.
1. Breakage of bowl o-ring.
1. Replace bowl o-ring. Grease up before
assembling.
4. Air leaks from the drainage cock.
1. Foreign matter caught in the threads of the
drain cock.
2. Breakage of the seating part of the drain
cock.
1. Remove the drain cock and clean threads.
2. Replace the bowl assembly.
5. Too much drain comes from
the piping of the outlet side.
1. Drain level reaches the baffle plate.
1. Open the drain cock for draining and replace the
element.
