FENDT FAVORIT 900, Workshop Manual

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Farmer 400
Fav 700
Fav 900
Tractor / General system
Troubleshooting chart for front suspension
B
Faults
09/2000 0000 000002 B a 1/2
Capitel Docu-No. Index Date Version Page
Troubleshooting chart for front suspension
Text-module
Message - symptom - fault
A Suspension does not rise
B Suspension does not lower / cannot be locked
C Suspension rises without valve actuation, i.e. without command
D Suspension lowers without valve actuation, i.e. without command
E Suspension is not stable, i.e. constant jerking movements
F Suspension does not spring up and down
G Commands are not carried out directly
H Suspension continues further than command
J Suspension cannot be calibrated
K Suspension is activated at slightest change, e.g. pulling away
L
X
likely
possible
Fault Cause
Action, if
necessary see ...
O
A B C D E F G H J K L
X Front axle load too
high
X Raise valve Y014 Fault in coil /
cartridge
X Lower valve Y013 Fault in coil /
cartridge
X Raise nozzle Bl 3 Blocked Visual inspection,
blow through, if nec.
X Lower nozzle Bl 4 Blocked Visual inspection,
blow through, if nec.
X Pressure duct open Bleed point AV 1/2
open Check Ma = 20 Nm
X Leak from B duct Non-return valve
RV2 Blow through /
replace
X to P or A Raise valve SV2 Blow through /
replace
X Bleed point AV2 Closed? Ma = 20 Nm
X O Leak Lower valve SV1 Blow through /
replace
X O from A duct to T Bleed point AV1 Closed? Ma = 20 Nm
X O Non-return valve
DBV-HPS 250 bar Blow through /
replace
X Leak in cylinder Oil flowing between
piston and rod sides
X 200 bar charge pres-
sure not available Fault in charge valve
MVL/Y012 Generate 200 bar
elsewhere, if nec.
replace
O Shuttle valve WLS1
leaking / not availa-
ble This fault would
affect entire
hydraulic system!
X Accumulator capacity
not available Fault in diaphragm
accumulator
ASP1/2, ZSP Replace