389
Model Code Page
35. Autocontrol IV
15. 5. 1996
6600E
8100E-- 8750E
350 5
1. 1. 1994
Components for AC IV system
See picture 2 on previous page.
A. Outdoor temperature sensor
Sensor B10C is fitted under the fixing screw for the headlight.
AC IV display shows the outdoor temperature.
B. Sensor for engine coolant temperature
Sensor (B9C) controls the cold starting automatics. An indica-
tor light on the instrument panel shows when the engine can
be started. The system controls automatically the afterglow-
ing in cold conditions. AC IV display shows also the engine
coolant temperature.
C. Sensor for front wheel steering angle
Sensor (S4C) notifies the AC IV system when the font wheel
steering angle is over ±15˚. Then the automatics disengage
the differential lock. The lock is re--- engaged automatically
when the front wheels are turned less than ±15˚
5. Sensor signal lights.
D. Potentiometer on fuel injection pump
Potentiometer (B8C) notifies the system the position of the
governor control lever on the fuel injection pump. AC IV com-
pares the governor control lever position and the engine revs.
Eg. the system changes automatically to the lower gear when
the engine revs drop during a hard load (and vice versa)
1. Universal grease.
2. Loctite 242.
E ---models have a starting solenoid Y8 in the front face of the
fuel injection pump, see page 350/7.
E. Sensor for engine revs
Sensor (B4C) is fitted on the gearbox under the cab. The sen-
sor measures the engine rotation speed from the gear for the
hydraulic pump drive mechanism. The display shows also the
engine revs. The sensor controls the engagement of the Delta
Powershift and indicates if the PTO clutch is slipping.
F. Sensor for rear axle rotation speed
Sensor (B1C) measures the rotation speed of the RH side rear
axle from the impulse disc fitted on the final drive planetary
gear. Engages the differential lock when the rotation speed
difference between the rear axles exceeds 20 %.
G. Display unit
Display unit A3C and the function keys are the same as on AC
III. Below the display unit there are switches for selecting
between the manual or automatic control of the tractor trans-
mission.
H
1
and H
2
. Sockets at the rear of the tractor
Socket X12C for connecting implement sensors to the AC IV
system.
PTO emergency stop socket X31 (terminator)
I. Central processing unit ECS (Electrical Control
System
)
The central unit ECS (connectors A1C, A2C) is fitted in the
lever console in the cab. On the ECS is fitted a sticker with
the tractor manufacturing number etc.
J. Sensor for PTO revs
Sensor (B3C) measures the rotation speed of the PTO shaft
from the impulse disc fitted on the shaft. Display shows the
PTO rotation speed.
Note! With effect from ser. no. F17107 the PTO control system
has been modified. In this new system the PTO has a relay
control (compare AC II and AC 2.1).
K. Radar
Radar (B7C) notifies the ECS the actual tractor travelling
speed. The radar is used e.g. for detecting the wheel slip. The
radar has been connected to the hydraulic power lift so that
when the set slip percent is exceeded the lift order is sent to
the power lift. The radar controls also the engagement of the
front wheel drive and the differential lock.
Radar --- You are not allowed to go under the tractor
which has radar (slip control models) before the current
switch has been turned off. --- dangerous for eyes.
L. Gearbox rotation speed sensor B2C and
front axle speed sensor B5C
The reverse shuttle housing has been changed. That is why
the above mentioned sensors are fitted in different positions
as on Autocontrol III.
M. Delta Powershift control unit A10
The control unit is the same on all Mezzo--- tractors which have
the Delta Powershift control with two push buttons in the gear
lever knob (not rocking switch). Control unit A10, ind. light
panel A9 and the buzzer B1 are shown on pages 311/3 ---6
(Autocontrol II).
Important! IN AC.2.1 system there are changes for DPS con-
trol, see code 312.
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