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Remedy in case of faults
Type of malfunction
Piston rod moves up and
down quickly.
Piston rod moves up and
down slowly when the
spray gun is closed.
Not enough pressure to
the spray gun.
Piston rod sputters when
stroking upward or down-
ward.
10. Servicing
10.1 General servicing
Servicing of the unit should be carried out once
annually by the WAGNER service.
1. Check high-pressure hoses, device connecting
line and plug for damage.
2. Check the inlet and outlet vents for wear.
3. Check oil level in hydraulic oil tank.
4. Carry out an oil change if necessary.
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g
Possible cause
Suction tube projects over
the fluid level and sucks in
air.
Coating material viscosity is
too high, preventing it from
being sucked up.
Ball in inlet valve housing is
stuck.
Loose connections.
Relief valve is not closed
completely.
Relief valve worn.
Lower packing worn.
Ball in inlet valve housing
and ball in outlet valve seat
are not sealing properly.
Tip is worn.
Filter cartridge in high-
pressure filter is clogged.
High-pressure hose is too
long.
Solvent has made the upper
packing expand.
Measure for elimination of malfunction
Refill the coating material
Thin out the coating material according to manufactu-
rer's instructions.
Vent air from material feed pump and turn the relief
valve knob to the left (k Circulation).
Dismantle inlet valve housing, clean ball and valve
seat. Check all connections between the material feed
pump and spray gun.
Turn relief valve knob to the right (p spray).
Replace
If the measures described above do not help, replace
lower packing.
Dismantle inlet valve housing and outlet valve seat.
Clean balls and valve seats.
Replace
Clean or replace the filter cartridge.
Reduce length.
Replace upper packing.
10.2 Checking the oil level in the
hydraulic oil tank
i
Check oil level daily
Switch off unit A (OFF).
Pull mains plug from the socket.
Danger
1. Turn oil measuring stick (fig. 17, item 1) to the left and
pull out.
2. The oil level should be visible between the marking
(see arrows) on the oil measuring stick.
3. If necessary, refill oil. For information on the oil grade,
refer to the oil change section, chapter 10.3.
Servicing
HC 35 E • HC 45 E • HC 55 E
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