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Page 13 of 16
Owner Manual
1.3A-28001-B97
Subject to change without notice
Fault: The line which has been charged after the reversing process is not relieved or
No pressure build-up in the respective line after the reversing process although the
pressure between the pump and change-over valve increases rapidly.
• Cause:
• The reversing piston does not reach its final position
• Remedy:
• The eccentric continues to operate for a short moment after the
impulse of the position switch. Check internal wiring of the ter-
minal strip (for the 24 V DC version refer to Fig. 12, item 27) and
that of the rectifier (for the 230 V AC version refer to Fig. 12,
item 26)
Replace the terminal block assembly and/or the power supply
assembly, if necessary.
• Check adjustment shown on Fig. 9:
Piston final position 1: the outer edge of the ball bearing must
be centered in the borehole of the connecting link and must be
visible (in the case of old models without borehole in the con-
necting link, the distance between the upper outer edges of the
ball bearing as shown on Fig. 9 and the connecting link must be
8
+1
mm).
Piston final position 2: acc. to Fig. 10: the lower outer edges of
the ball bearing and the connecting link must be aligned (tole-
rance: the outer edge of the ball bearing may lie up to 1 mm
under the connecting link).
If both ball bearing positions are overrun or if the ball bearing
stops before it has reached the positions: check the value of
20
-0.5
and re-adjust it, if necessary.
The ball bearing stops before it has reached its position in pi-
ston final position 1 and overruns the position of piston final
position 2: push the position switch towards the connecting link.
The ball bearing overruns its position in piston final position 1
and stops before it has reached the position of piston final posi-
tion 2: push the position switch away from the connecting link.
