Storch Airless LP 500 F Mode D'emploi page 150

Servicing the fluid pump
Fluid pump removal:
1. Relieve the pressure.
2. Flush the spraying material out of the device.
3. Remove the cover (12) on the connecting rod.
4. Move the piston rod (10) to the bottom position by let-
ting the pump run slowly.
5. Switch off the motor and isolate the device from the
power supply.
6. Remove the material pipe (16) from the pump housing.
7. Remove the circlip (4) from the connecting rod (2) and
push the sleeve (3) downward to expose the pin (1) on the
connecting rod.
8. Remove the suction pipe from the material pump (9)
by releasing the valve nut (7) with the packing adjust-
ment tool.
9. Remove the two screws (8) and the cover (14). The
fluid pump (9) is now loosely suspended.
10. Remove the pin (1) on the connecting rod from the
connecting rod (13) so that the fluid pump (9) can be
removed.
Reassembling the fluid pump:
1. Loosen the gland nut and make sure that the piston rod
(10) is at the topmost position of the fluid pump housing.
Push the sleeve (3) and the circlip (4) over the piston rod
(10).
2. Push the piston rod (10) upward into the connecting
rod (2). Push the pin (1) on the connecting rod through
the connecting rod (2) and the piston. Push the sleeve (3)
upward over the pin (1) on the connecting rod and then
push the circlip (4) into the groove on the connecting rod
(2).
3. Push the two pipe spacers (11) between the fluid
pump (9) and the cover (14), and push the two screws
(8) through the spacers; then tighten the screws evenly
(alternately).
4. Re-assemble the lower suction valve group by placing
the seating, the o-ring, the ball and the ball guide into
the valve nut (7) and bolting onto the fluid pump housing.
5. Connect the fluid pipe (16) with the fluid pump hou-
sing.
6. Start the pump and run it slowly to check whether the
piston rod (10) is correctly set. If needed, adjust the two
screws (8) that hold the cover on the fluid pump housing.
This prevents the piston rod from blocking.
7. Tighten the gland nut clockwise until you feel some
resistance against the disc spring; tighten another three
quarter turn. The tightening torque of the packing nut
amounts to 2,7 Nm. Fill five drops of piston oil into the
gland nut.
Original instruction
8. Run the pump for a few minutes at full pressure.
Relieve the pressure using the depressurisation approach
(chapter 4) and then adjust the gland nut – as shown in
step 7 above.
9. Fit the cover (12) on the connecting rod so that the
small hole is in the top right-hand corner.
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