Storch Airless ST 550 Mode D'emploi page 213

Problem What to Check
If check is OK, go to next check
Pump output is Broken and misaligned motor brush
low springs. Rolled portion of spring must
rest squarely on top of brush.
Motor brushes are binding in brush hol-
ders.
Motor runs but Con rod damaged.
pump does not
Gears or drive housing damaged.
stroke
Excessive paint Packing nut has loosened
leakage in the
Packing seals are worn or damaged.
packing nut
Piston is worn or damaged.
Fluid is spitting Air in pump or hose.
from gun
Tip is partially clogged.
Fluid supply is low or empty.
Pump is difficult to Air in pump or hose.
prime.
Intake valve is leaking.
Pump packings are worn.
Paint is too thick.
Sprayer operates Packing nut too tight.
for 5 to 10 minutes
then stops
What to Do
When check is not OK, refer to this column
Replace spring if broken. Realign spring with brush.
Clean brush holders, remove carbon dust with a small
cleaning brush. Check whether carbon can be correct-
ly installed again in the right position.
Replace con rod.
Inspect drive housing assembly and gears for damage
and replace if necessary.
Tighten the packing nut to redress the leakage.
Replace paint level.
Replace paint level.
Check and tighten all liquid-carrying connections.
Allow pump to cycle as slowly as possible during pri-
ming.
Clear tip. See Cleanup.
Refill fluid supply. Prime pump. Check fluid supply
often to prevent running pump dry.
Check and tighten all liquid-carrying connections.
Allow pump to cycle as slowly as possible during pri-
ming.
Clean intake valve. Make sure the ball seat is not
nicked or worn and that the ball is properly seated.
Reassemble valve.
Replace paint level
Thin the paint according to supplier recommenda-
tions.
Slightly loosen packing nut. Only so much that there
are leakages.
213 Original instruction