Corrective Action - SATA HKU Betriebsanleitung

SATA HKU | 11
8. Trouble-shooting
Malfunction
Pump does not work
Pump reciprocating but not delivering
Pump runs irregularly
Oil/spraying medium is leaking from the
exhaust silencer
Pump is running despite the outlet being
closed.
Compressor performance drops during
operation of the material pump
Cause
No or low air pressure
Defective air motor
Foreign object jamming the movement of
the central bar.
Clogging of material hose, shut-off valve,
spray gun or filter.
Pump pressure regulator incorrectly set or
defective.
Barrel empty
Float valve jammed (if fitted).
Foot valve not functioning
Piston valve or seals worn.
Excessive air resistance on the suction
side.
Packings are chafed.
Suction hose or suction tube does not seal
properly, pump takes in air.
Packing between air motor and pump is
worn out or damaged.
Packing on the lower piston assembly is
worn out or damaged.
Dirt in the bottom valve or in the lower
piston assembly.
Compressor performance insufficient

Corrective Action

Check the air line valve, regulator and
quick coupling.
Check the air motor and the seals. Re-
place defective parts.
Check for free movement and for foreign
objects inside the piston valve etc.
Remove clogging
Check material pressure regulator.
Replace barrel
Check if float valve moves freely, as re-
quired.
Check spring and ball for correct opera-
tion and seating. Check for foreign objects
jammed in the foot valve.
Check for foreign objects in piston valve
seat. Check seals for wear and damage.
Lower the air pressure in order to reduce
the speed of the pump or mount a speed
regulator.
Replace packings (Attention: Repair must
be carried out by the manufacturer only.)
Seal with teflon band.
See section "Service of the air motor"
See section "Service of the pump mecha-
nism"
Install larger compressor
EN