Ammann ARR 1575 - Engine Speed and Frequency Check

239ARR1575
557D242
557D243
557D244
557D245
WORKSHOP MANUAL
Adjustment
Loosen the lock nut on the plug head.
Push the piston rod completely down with your hand.
The stop (arrow) must not touch the adjustment screw.
Use afeeler gauge (1.5 mm) to determine the distance between
the adjustment screw and the stop.