PDF Service Manual CLAAS MEDION 340 310 - 699 KB
This technical service manual provides in-depth information on the electrical systems of the CLAAS MEDION 340 and 310 combine harvesters.
It includes detailed wiring diagrams, troubleshooting flowcharts, and component testing procedures.
This guide is an indispensable resource for technicians diagnosing and repairing electrical faults.
Keep your MEDION's advanced systems functioning perfectly with this expert manual.
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--- Page 1 ---
MEDION 340 – 310
From serial number:
934 00610
932 02724
Technical Systems
Electric System
--- Page 3 ---
TIC MEDION Electric system
Key to diagram: a Fuse block a .................................................. ZE (Central terminal
compartment)
a1 Left-hand work lights fuse ............................. 34
a2 Reel adjustment fuse .................................... 4, 14, 15, 17, 20, 21,
24
a3 Cab outside work lights fuse.......................... 34
a4 not used
a5 Lights main circuit fuse ................................. 32
a6 CAC / Cab electric system fuse .................... 24, 36
a7 Lights main circuit fuse ................................. 32
a8 Cab fan fuse ................................................. 38
a9 Function information unit fuse ...................... 12, 24, 26, 30
a10 Lights main circuit fuse ................................. 32
a11 Windscreen wiper fuse ................................. 37
a12 Road travel enable fuse ................................ 4
a13 Lights main circuit fuse ................................. 32
a14 Engine control unit fuse ................................ 2
a15 Drive fuse....................................................... 7, 15, 17, 19
a16 Work lights fuse ............................................ 34
a17 Front attachment circuits / 8, 20, 21, 23,
reel adjustment fuse ..................................... 40
a18 Lighting, sieve pan, grain tank and returns
fuse ............................................................... 35
A8 AUTOCONTOUR module (CAC) .................. 20, 24
A9 AUTOPILOT module (ATP) ........................... 28
A12 Speed monitor module (DZW)....................... 25
A17 Engine adaptation module (ADM) ................ 1,2
A52 Multi-function handle module......................... 14, 15, 17, 20, 21, 24
B Fuse block b .................................................. ZE
b1 Right-hand dipped headlights fuse ................ 33
b2 Vehicle information unit / Indicator fuse......... 1, 3, 5, 26, 28,
31
b3 Warning beacon fuse..................................... 30
b4 Left-hand dipped headlights fuse .................. 33
b5 Indicator system fuse..................................... 31
b6 Instrument lighting fuse.................................. 26, 29, 33,
35, 36
b7 Work lights fuse ............................................. 34
b8 Work lights fuse ............................................. 34
b9 Horn fuse ....................................................... 35, 39
b10 Threshing mechanism fuse ........................... 7, 10, 12, 28, 40
b11 Fan variable-speed drive fuse ....................... 10
b12 Relay K59 control fuse................................... 3, 38
b13 Speed monitor fuse........................................ 10, 25
b14 Reel variable-speed drive.............................. 19
b15 Alternator release fuse................................... 3
b16 Additional socket fuse.................................... 40
b17 Cooling unit, air conditioner fuse ................... 38
b18 Fieldwork computer / Yield meter fuse .......... 5, 27
C1 Front attachment reverse fuse....................... ZE, 17
DO Master valve diode PCB ................................ 4
DI Diode PCB ..................................................... 2b, 3, 24,
25, 26, 30
DM Daimler-Chrysler diagnosis plug ................... ZE, 2
F3 Engine fuse block ......................................... ZE, 2
08/05 Med-e-ZE ZE-3
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TIC MEDION Electric system
Overview of fuses:
Fuse Circuit Circuit Circuit Circuit Circuit Circuit Circuit
Diagram Diagram Diagram Diagram Diagram Diagram Diagram
a1 34
a2 4 14 15 17 20 21 24
a3 34
a4
a5 32
a6 24 36
a7 32
a8 38
a9 12 24 26 30
a10 32
a11 37
a12 4
a13 32
a14 2
a15 7 15 17 19
a16 34
a17 8 20 21 23 40
a18 35
b1 33
b2 1 3 5 25 26 28 31
b3 30
b4 33
b5 31
b6 26 29 33 35 36
b7 34
b8 34
b9 35 39
b10 7 10 12 28 40
b11 10
b12 3 38
b13 10 25
b14 19
b15 3
b16 40
b17 38
b18 5 27
c1 17
F3 1 2
08/05 Med-e-ZE ZE-13
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TIC MEDION Electric system
Description of function:
Diesel engine After actuating the engine speed adjustment switch S35, earth is applied
speed adjustment at the engine adaptation module A 17 both at pin 2/10 and at pin 2/6 when
switch Z 41 is closed. The engine is running at rated speed.
With 3rd gear engaged, transmission switch Z 41 is open, earth is now
applied only at pin 2/6. The engine is running at reduced speed (road
travel).
08/05 Med-e-02a 02a-3
--- Page 6 ---
4a
Activation of road travel,
master valve
--- Page 7 ---
7a
Threshing mechanism circuit
--- Page 8 ---
12a
Deflector adjustment,
performance monitor
--- Page 10 ---
19a
Reel variable-speed drive
--- Page 11 ---
TIC MEDION Electric system
Description of function:
Reel raise/lower circuit When the „Reel raise/lower function“ is activated, the corresponding
solenoid coils Y22 / Y23 are energized directly by switches S19 / S20 via
the multi-function handle module A52.
The master valve (Y77) is also actuated via the diode PCB (DO) in
parallel with solenoid coil (Y22) because this function requires that
pressure is built up in the system.
Reel forward/backward In the reel forward/backward function, the corresponding solenoid coils
circuit Y24 / Y25 are actuated directly by switches S21 / S22.
The master valve (Y77) is also actuated via the diode PCB (DO) in
parallel with solenoid coils (Y24, Y25) because this function requires that
pressure is built up in the system.
Folding the maize picker When the „Fold maize picker to working position“ function is activated, the
to working position corresponding solenoid coil Y25 is energized directly by the fold maize
header switch (S34).
The master valve (Y77) is also actuated via the diode PCB (DO) in
parallel with solenoid coil (Y25) because this function requires that
pressure is built up in the system.
The fold maize header switch (S34) must be actuated for another
6 seconds after the folding procedure in order to pressurise the system
hydraulically.
Folding the maize picker When the “Fold maize picker to transport position” function is activated,
to transport position the corresponding solenoid coil Y24 is energized directly by the fold maize
header switch (S34).
The master valve (Y77) is also actuated via the diode PCB (DO) in
parallel with solenoid coil (Y24) because this function requires that
pressure is built up in the system.
In addition, solenoid coil Y23 must be energized via the fold maize header
switch (S34) in order to perform this function.
Snapping plate adjustment When the “Snapping plate adjustment” function is activated, the
corresponding solenoid coils Y25 / Y25 are energized directly by the reel
forward / reverse switches S21 / S22 via the multi-function handle module
A52. The master valve (Y77) is also actuated via the diode PCB (DO) in
parallel with solenoid coils (Y24, Y25) because this function requires that
pressure is built up in the system.
08/05 Med-e-21a 21a-3
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TIC MEDION Electric system
Connector pin
assignment:
Connector Connector Connector
PVBge, PVCge, KNBge MFAgn, MFBgr MFG
Connector XL Socket XL
08/05 Med-e-24a 24a-5
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TIC MEDION Electric system
Description of function:
Speed monitoring The frequencies of the individual sensors are processed by the speed
monitoring module A12. If the allowed slip values are exceeded, the module
activates the corresponding signal lights and the buzzer as an acoustic
warning. Relay K77 passes the alarm messages on to the warning buzzer
(H44) (see diagram 3).
Important! The chopper speed monitoring is active only if switch Z59 is
closed (straw chopper in working position).
SET speeds Min. speeds
rpm rpm
Straw walker 220 174
Returns elevator 308 230
Grain elevator
MEDION 310-330 380 260
MEDION 340 450 260
Feed rake 520 385
Straw chopper
2 cams 3300 2820
4 cams 1920 1410
08/05 Med-e-25a 25a-3
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TIC MEDION Electric system
Description of function:
Yield measuring The yield measuring is based on flow rate measurement by the light
barrier (B59/B60) inside the grain elevator, depending on transverse and
longitudinal inclination of the machine. Based on these signals, the yield
meter module (A21) calculates the yield and displays this information in
terminal A30 via the CAN bus.
System calibration by entering the litre weight and by checking the values
by counterweighing a defined grain quantity constitute important
fundamentals for a precise calculation.
Humidity measurement The measurements made by the humidity sensor (B61) are also displayed
by the yield meter module (A21) in terminal A30 via the CAN bus, but are
not used for calculating the gross weight.
Terminal A30 requires these measured values for calculation only for
stating the net weight in order processing.
Fieldwork computer The signals from sensors B10, B11, B15 and B16a are entered into the
functions fieldwork computer module (BIF/CAB) A10 and processed there. This
module transmits the established information data to terminal A30 via the
CAN bus.
08/05 Med-e-27a 27a-3
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TIC MEDION Electric system
Description of function: None
08/05 Med-e-29a 29a-3
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TIC MEDION Electric system
Interconnection list:
from to 1 to 2 to 3 to 4 to 5 mm² Colour
BLAgn - 6 LSC 7 HKA 2 1.5 bk/wh
BLAgn - 12 LSC 8 HKA 3 1.5 bk/gn
HKAbl - 2 LSC 7 BLA 6 1.5 bk/wh
HKAbl - 3 LSC 8 BLA 12 1.5 bk/gn
LSAgr - 3 K57/C2 0.5 bl/rd
LSAgr - 7 b2a 1.5 bk
LSBgr - 4 EARTH PVA 21 PVB 6 MFB 1 MFB 2 1.5 br
LSB 10 LSB 4 PVC 12 CAC 8 CAC 17
AP 8 AP 9 KBB 6 KBB 8 K60/85
KBA 17 K64/85 VSA 4 DO 22 FSA 1
APA 8 MOA 2 HKA 19 PHA 2 KNA 2
K79/30 K57/31 K61/85 K52/85 K53/85
K66/85 K69/87a K70/87a K71/87a K72/87a
K75/85 K77/85 BFA 3 ASA 1 KBA 5
KBA 9 KBA 10 K54/85 ZGA 3 ZGA 4
LSA 1 HDA 8 MOB 2 FSA 5 K49/85
K50/85 KBB 12 BFA 2
LSBgr - 10 EARTH PVA 21 PVB 6 MFB 1 MFB 2 1.5 br
LSB 10 LSB 4 PVC 12 CAC 8 CAC 17
AP 8 AP 9 KBB 6 KBB 8 K60/85
KBA 17 K64/85 VSA 4 DO 22 FSA 1
APA 8 MOA 2 HKA 19 PHA 2 KNA 2
K79/30 K57/31 K61/85 K52/85 K53/85
K66/85 K69/87a K70/87a K71/87a K72/87a
K75/85 K77/85 BFA 3 ASA 1 KBA 5
KBA 9 KBA 10 K54/85 ZGA 3 ZGA 4
LSA 1 HDA 8 MOB 2 FSA 5 K49/85
K50/85 KBB 12 BFA 2
LSCgr - 7 BLA 6 HKA 2 1.5 bk/wh
LSCgr - 8 HKA 3 BLA 12 1.5 bk/gn
LSCgr - 10 K57/49a 2.5 wh/gn
LSCgr - 11 K57/49 2.5 bk/rd
LSCgr - 12 b5a 2.5 rd
08/05 Med-e-31a 31a-5
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TIC MEDION Electric system
Description of function: None
08/05 Med-e-33a 33a-3
--- Page 19 ---
TIC MEDION Electric system
Description of function: None
08/05 Med-e-35a 35a-3
--- Page 20 ---
TIC MEDION Electric system
Description of function: None
08/05 Med-e-37a 37a-3
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TIC MEDION Electric system
Description of function: 3/7
2nd menu item Press key (3) once.
The blow-out temperature in °C is displayed.
Blow-out temperature
Example: 29.3°C
If the temperature display is incorrect, please check the following:
1. Position and possibly soiling of the AC blow-out temperature
sensor (B87), (behind the large blow-out nozzle, top left).
2. Connector on the automatic air conditioner module (A6).
3. Measure the resistance of the AC blow-out temperature sensor
(B87), must be 10kOhm at 25°C.
4. Offset value of AC blow-out temperature sensor (B87) in the
controller menu.
rd
3 menu item Press key (3) once.
The outside temperature in °C is displayed.
Outside temperature
Example: 21.1°C
If the temperature display is incorrect, please check the following:
1. Position and possibly soiling of AC outside temperature sensor
(B88), (top left, below the roof cover, behind the fresh air filter).
2. Connector on the automatic air conditioner module (A6).
3. Measure the resistance of the AC outside temperature sensor
(B88), must be 10kOhm at 25°C.
4. Offset value of AC outside temperature sensor (B88) in the
controller menu.
th
4 menu item Press key (3) once.
The heater solenoid coil (Y109) is switched on.
Heater solenoid coil (Y109)
Example: Test step 4 is displayed
If the solenoid coil is not activated, please check the folllwing:
1. Connector on the heater solenoid coil (Y109)
(top right, below the roof cover).
2. Voltage at the solenoid coil of 11.5 – 14.5 V, with the output
activated.
The solenoid coil must be connected.
3. Connector on the automatic air conditioner module (A6).
4. Check for short-circuit or break in the cable on the heater solenoid
coil (Y109).
08/05 Med-e-38b 38b-5