Rapid-Air AIR FEED / RAPID MASTER WITH KEYPAD - Manual (Page 11)


problem possible Causes remedy
characteristics and possible causes
of troubles with rapid-air feeds
Feed and stock clamps work,
but slide block does not move when
actuating valve is depressed.
Excessive leakage of air from
exhaust hole beneath speed
adjusting screw when actuating
valve is in up position.
Excessive leakage of air from exhaust
hole, also sluggish operation of feed
clamp pistons, actuating valve up.
Excessive leakage of air from
exhaust hole when actuating
valve is in down position.
(Note: that a slight amount of
leakage is normal in this position).
Stock clamp does not move up and down
when actuating valve is depressed.
Other operations appear normal.
Excessive leakage of air from
actuating valve vent hole when
actuating valve is in up position.
Gradually reduced speed.
Excessive leakage of air from pilot op-
erated valve vent hold on side of feed.
– Pilot operated valve is stuck.
– Poppet not seating on bottom of
valve hole.
– Leaking of “O” rings #85, 83, 84, 88,
90 and 100.
– Leaking of “O” rings #85 and 90.
– Tight “O” rings or grit around pilot
operated valve may prevent it from
moving its full stroke.
– Worn poppet.
– Poppet in backwards.
– Worn “O” rings #96 around O.D. of
stock clamp pistons.
– “O” rings #103 beneath actuating
valve retainer #31C is leaking.
– Lack of oil.
– Low viscosity oil.
– Speed adjusting screw turned in too far.
– Oversized poppet.
– Leaking of “O” rings #100, 101 or 102.
– Check for grit, swollen nylon or
swollen “O” rings.
– Check for grit or chips.
– Check “O” rings #85, 83, 84, 88, 90
and 100. See assembly drawing
#106 for location.
– Check “O” rings #85 and 90. See
assembly drawing #106 for location.
– Clean grit, cycle feed manually to
break in “O” rings.
– Insert new poppet.
– See feeds parts list #106 for correction
orientation.
– Replace “O” rings. See assembly
drawing #106 for location.
– Install “O” rings beneath retainer -
not in air groove. See assembly
drawing #106.
– Adjust air / oil mixture.
– Use lighter weight oil.
– Readjust screw.
– Clean poppet area; check for free fit.
– Check “O” rings #100, 101 and 102.
See assembly drawing #106 for location.