Text-module Reason: Bullet-List The pressure pipes of the front suspension between the central control block ZSB and the suspension cylinders, the accumulators ASP1 and ASP2 on the central control block and the piped accumulator ZSP are subject to a pressure of 200 bar even with the engine switched off and the suspension lowered (=locked)! Action: The pressure has to be relieved manually before any repair is carried out or anything is released or opened in this area. Note: The "Lock suspension / lower suspension" command has no effect! Steps: PM-Picturemodule PMTAB_Picture 1.
Loosen stopcock item A (stopcock is labelled AV2 in further documents and circuit diagrams) on top of central control block by approx. 1 turn anti-clockwise. PM-Picturemodule PMTAB_Picture 2. Loosen stopcock item B (stopcock is labelled AV1 in further documents and circuit diagrams) on bottom of central control block by approx. 1 turn anti-clockwise. Text-module Check: Emptying of accumulator sounds like flowing liquid as oil temperature increases (scarcely audible in winter). Note and comparison: For tractors without a central control block (e.g. Fav 500) it is still necessary to relieve pressure using the "External power supply" method.
Central control block General Farmer 400 Fav 700 Fav 900 Working and steering hydraulics / General system Safety instructions and measures A Date Version Page Safety instructions and measures Capitel Index Docu-No. 12/1999 a 1/1 0000 A 000012