Service Bulletin NTR SB 026 96
Magnum Hitch Diagnostic Codes and Service Manual update
Page 2 of 26
GENERAL INFORMATION
The following items should not be over looked when troubleshooting the Magnum hitch system.
1. A
backwards “c”
in the hitch diagnostic display means the control module is not calibrated.
Do not replace the control module, perform calibration.
2. When reading and erasing error codes during calibration of the hitch control module, see page 5
of this bulletin, when
“r.”
appears on the diagnostic display. It will be followed by 102 or 200.
102 - part number 112889A1
200 - part number 232835A1, after serial number JJA0067094
3. The EDC relay (number 6) has been eliminated on the Magnum tractors above serial number
JJA0064978 (electric PTO).
Wire LB/529-18 (pin 14 of the 16 pin connector) is connected
directly to fuse number 7.
4.
5.
6.
7.
8.
9.
Loose position lever and rockshaft potentiometer shaft set screws will affect hitch performance
and may not show up as error codes.
The hitch must be recalibrated every time an hitch component is replaced or adjusted.
An empty hitch may move up slightly when the tractor is backed up if the load setting knob is set
below # 5. Set load knob above # 5.
Hitch enable indicator light should be lit when a error code is displayed. If not, the lamp is faulty.
The controller remote hitch switch error code is self correcting when the switch is released,
provided that the switch has not failed.
The hitch position lever must be cycled to recapture the hitch position when the tractor is started
and the rock shaft potentiometer and the position lever potentiometer are not within 2%
(
0.077 volts) of each other
(Enable light will be flashing).
10. The hitch position must be recaptured with the position lever after the hitch has been raised or
lowered with the remote hitch switch
(Enable light will be flashing).
11. The decimal point on the display should disappear when the tractor is moving faster than .5
MPH. If the decimal point in the display does not disappear when the tractor is moving .5 MPH
or greater, the ground speed sensor or its circuit has failed.
Summary of Contents for Magnum 7210
Page 24: ......
