Ammann ARR 1575 - Travel Pump Servo Block Check

311ARR1575
557D050
557D051
557D052
557D053
WORKSHOP MANUAL
18.2.8 Travel pump servo block check
The procedure shall be performed when:
• The electric part of the machine has been checked and the
machine is still not running.
• The machine only moves in one direction.
• The machine only moves slowly with the lever switched to
the limit position.
• The machine moves unequally.
A view of the travel pump.
Pull out the connector from magnetic coils Y3 (on the left) and
Y4 (on the right).
Remove plugs X1 and X2.
A view of the travel pump without aplug.
If the oil does not ow under the unscrewed plug back to
the pump housing, apertures are clogged or the piston is
out of the centre and jammed.