Maintenance And Service; Maintenance And Cleaning; Correction Of Malfunctions - Bosch PFS 55 Manual Original

OBJ_BUCH-670-003.book Page 18 Monday, October 14, 2013 4:53 PM
18 | English

Maintenance and Service

Maintenance and Cleaning

 Before any work on the machine itself, pull the mains
plug.
 Never immerse the electrical unit into solvent or water.
Clean the housing using only a moist cloth.
Cleaning (see figures H–I)
Proper cleaning is the requirement for flawless operation of
the spray gun. Improper or lack of cleaning voids warranty
claims.
Always clean the spray gun and the container with the respec-
tive diluting agent (paint thinner or water) for the spray mate-
rial being used.
Never clean the nozzle and air holes of the spray gun with
pointed metal objects.
Do not pour diluted spray material back into the original spray
material drum/tin for storage.
Clean the spray gun thoroughly after having sprayed material
hazardous to one's health.
– Unplug the mains plug and pull the trigger switch 16 so that
the spraying material can flow back into the container.
– Remove the electrical unit. (see page 16)
– Unscrew the container 11 and empty the remaining spray
material back into the original spray material.
– Fill diluting agent (paint thinner or water) into the contain-
er and screw it to the spray gun.
– Shake the spray gun several times.
– Connect the spray gun to the electrical unit again. (see
page 16)
– Plug the mains plug into a socket outlet, pull the trigger
switch and spray the diluting agent into an empty material
tin.
– Repeat the process until clear diluting agent emerges from
the spray gun.
– Unplug the mains plug and remove the electrical unit.
– Completely empty the container 11.
– Check if the suction tube 10 and the container seal 13 are
free of spray material and undamaged.
– Clean the outside of the container and the spray gun with a
cloth moistened in paint thinner.
– Unscrew the union nut 14 and the air cap 13.
– Clean the nozzle 20 and the nozzle needle with diluting
agent.

Correction of Malfunctions

Problem
Spray material does not cover
properly
1 609 92A 0AA | (14.10.13)
From time to time, the nozzle seal 21 must also be cleaned.
– Remove the nozzle 20 and the nozzle seal 21.
If required, use a pointed object, as the nozzle seal is seat-
ed firmly to the spray gun.
– Clean the nozzle seal with diluting agent.
– Reinstall the nozzle seal in the spray gun. Pay attention that
the groove points away from the spray gun.
– Mount the nozzle onto the spray gun body and turn it to the
correct position.
– Mount the air cap 13 onto the nozzle and tighten with the
union nut 14.
Cleaning the Venting Hose (see figure G)
When the venting hose 17 is contaminated with spraying ma-
terial, it must be cleaned.
– Remove the vent cover 12.
– Pull off the venting hose 17.
– Unscrew the venting valve 18.
– Remove the membrane 19.
– Clean the venting hose, the venting valve and the mem-
brane with an appropriate paint thinner.
– After cleaning, reinsert the membrane again first. Pay at-
tention that the longer rod faces upward.
– Screw the venting valve on again.
– Afterwards, attach the venting hose to the valve first, then
at the top on the spray gun.
– Reattach the vent cover again.
Changing the Air Filter (see figure L)
Note: Never operate the power tool without the air filter.
Without the air filter, dirt/contamination can be drawn in and
can influence the operation of the power tool.
The air filter must be replaced when soiled.
– Loosen screw 7.
– Remove the air filter cover 3.
– Replace the air filter.
– Reattach the air filter cover and screw in the screw again.
Material Disposal
Diluting agent and remainders of spray material must be dis-
posed of in an environmentally-friendly manner. Observe the
manufacturer's disposal information and the local regulations
for disposal of hazardous waste.
Chemicals harmful to the environment may not be disposed
of into soil, groundwater or bodies of water. Never pour
chemicals harmful to the environment into the sewerage sys-
tem!
Cause
Spraying capacity too low
Clearance to target area too large
Not enough spray material on target area,
too few spray paths sprayed over target area
Spray material too viscous
Corrective Measure
Turn thumbwheel 15 in direction +
Reduce spray distance
Apply more spray paths over target area
Thin down the spray material by 10% again
and carry out a test-spray run
Bosch Power Tools