Case Magnum 7210, Сервисный бюллетень

Страница: 14 / 26

Service Bulletin NTR SB 026 96
Magnum Hitch Diagnostic Codes and Service Manual update
Page 14 of 26
PROBLEM
Position command lever is not at
minimum
Lower PWM
threshold is above 5536.
Lower PWM threshold is below 4%.
Calibration time expired.
Hitch position is not at minimum.
Hitch position range is not within
limits.
A scaling factor between position
command and hitch position is not
within limits
Wrong draft pm connected when
operating on one pin.
SYMBOL
4
Position command lever is not at A
Move lever to minimum.
minimum.
.
3 Position command potentiometer
3 Replace position command
failed.
potentiometer.
C Position command potentiometer C Tighten the lever onto the
shaft
IS
loose from lever. potentiometer shaft.
D Position command potentiomer out D Adjust position command
of adjustment.
potentiometer.
A C o i l resistance is very high. A Replace coil.
B Lower driver does not connect to B Test wire harness for continuity.
coil.
C Battery voltage is very low or power
C Test tractor battery circuit output.
to coils is disconnected.
D Valve lower portion is stuck closed.
D Repair or replace hitch control
Hitch
valve
null out of adjustment. valve.
i
A
Coil
resistance is very low. A Replace coil.
B Battery voltage is very high. B Test tractor battery circuit output.
Hitch valve null out of
adjustment..
C
Valve failure. C Repair or replace hitch control
valve.
A Operator did not acknowledge A Recalibrate.
(within 6 minutes) when hitch is at
the bottom when display is ‘u’.
A Hitch position lever is not at A Move hitch position lever to
minimum. minimum or remove obstruction
from hitch.
B Replace position potentiometer.
B Position potentiometer failed.
C Adjust position potentiometer.
C Position potentiometer is not set per
0.9 to 1.1 volts at minimum.
A A Replace position potentiometer. Position potentiometer failed.
B Position potentiometer shaft is loose B Tighten the lever onto the
.
from lever. potentiometer shaft.
C Hitch travel restricted. C Remove obstruction from hitch.
q
A Position or position command or A Replace position or position
both potentiometers failed. command or both potentiometers.
B Position or position command or
B Tighten the levers on the
both potentionmeters shafts are loose
potentiometer shafts.
from lever.
A Left side draft pin connected instead A Remove wire harness from left
of the right side. side draft pin and connect to the
right side.
SOLUTIONS POSSIBLE CAUSES
N O T E :
All calibration failures will result in HALT
condition. You must correct the
problem.
restart the
engine and start calibration again.