Schwing SP 1800-D, Original Operating Instructions

Page: 302 / 390

4.42-2
004.076.01-EN
DRIVE CONCRETE PUMP IN REPAIR MODE
- Remove the top cover of the water box
(Fig. 1).
- Drain the water.
- Close the ball valve 1 (Fig. 2) on the concrete
pump control block in order to prevent
switching of the piston rods in the final
position.
- Start the motor and select an increased idling
speed.
- Set the lowest concrete pump stroke rate.
- Drive the concrete pump with the remote
control.
CHECK FASTENER
- Bring an intermediate piece into the water
box.
- Check the fastening screws for tightness
(Fig. 3).
While doing so, hold distance piece on the
continuous hexagon.
- Bring the second intermediate piece into he
water box and repeat the inspection.
REPLACE PUMPING PISTON
If sand is in the water box, the pumping pistons
are worn and need to be replaced.
Leaking pistons cause premature wear of the
pumping cylinder.
However, should sand get into the water box
despite new piston, then the cylinders must
also be replaced.
Always renew both pistons together.
Fig. 1
Fig. 2
Fig. 3