Linde T20R Manual
Thistrainingmaterialisonlyprovidedforyouruseandremainstheexclusivepropertyof
LINDEAG LindeMaterialHandlingDivision
Service Training
M2 / Chapter 3
144 804 24 01.0203
Pallet truck
T20R - Type 140
T20S - Type 144
T 20 S
T 20 R
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Service Training Contents
Page 1
M2 / Chapter 3
144 804 24 01.0203
CONTENTS
Description: Electric pallet truck with seat T20R type 140.....................................................................1
Description: Electric pallet truck, standing T20S type 144.....................................................................1
1 Drive motor..........................................................................................................................1
1.1 Technical data .....................................................................................................................2
1.2 Description ..........................................................................................................................2
2 Gearbox...............................................................................................................................1
2.1 Technical data .....................................................................................................................2
2.2 Description ..........................................................................................................................3
4 Steering and wheels ............................................................................................................1
4.1 I.E.S. steering in T20R and T20S (until 05/98) ....................................................................2
4.2 L.E.S. steering in T20R and T20S (from 06/98)...................................................................3
4.3 Steering motors ...................................................................................................................4
4.4 Steering motor connection................................................................................................... 5
4.5 Check and if required, replace brushes...............................................................................5
4.6 Drive wheels........................................................................................................................6
4.7 Stabiliser wheel T20R - T20S..............................................................................................7
4.8 Load wheels T20R - T20S................................................................................................... 8
5 Operation and brake controls ..............................................................................................1
5.1 Control module T20S...........................................................................................................2
5.2 Pedals T20R........................................................................................................................3
5.3 Progressive brake T20R .....................................................................................................4
5.4 Progressive brake T20S .....................................................................................................5
5.5 Technical characteristics of the brake - Digisoft and Moditorque -......................................6
5.6 Adjustment of the Digisoft brake gap...................................................................................6
5.7 Adjustment of the Moditorque brake gap .............................................................................6
5.8 Technical characteristics of the brake - Warner (T20S)......................................................7
5.9 Adjustment of the Warner brake gap ...................................................................................7
6 Electrical equipment ............................................................................................................ 1
6.1 T20R type 140 with LTM .....................................................................................................2
6.1.1 Location of electric components T20R type 140 (LTM).......................................................3
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Service Training
Contents
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6.1.2 Traction control T20R (LTM) ............................................................................................... 4
6.1.3 Accelerator T20R ................................................................................................................5
6.1.4 Progressive braking T20R...................................................................................................6
6.2 T20S type 144 with LTM......................................................................................................8
6.2.1 Location of electric components T20S type 144 (LTM) .......................................................9
6.2.2 Traction control T20S (LTM).............................................................................................. 10
6.2.3 Progressive braking T20S.................................................................................................11
6.2.4 Accelerator T20S............................................................................................................... 12
6.3 Presenting the LTM speed control..................................................................................... 14
6.3.1 LTM power circuit ..............................................................................................................15
6.3.2 Mosfet type power transistors 1V1 and 1V2 .....................................................................16
6.3.3 Transistors control with field effect ....................................................................................17
6.3.4 Transistor conduction........................................................................................................18
6.3.5 Transistor blocking ............................................................................................................19
6.3.6 Transistor protection module .............................................................................................20
6.3.7 Transistor module cabling..................................................................................................21
6.3.8 Installation of the transistor modules .................................................................................21
6.3.9 Transistor module checking .............................................................................................. 22
6.3.10 Power diodes.....................................................................................................................23
6.3.11 Measurement shunt...........................................................................................................23
6.3.12 LTM speed control............................................................................................................. 25
6.4 LBC control module 1A2....................................................................................................27
6.4.1 LBC control module check ................................................................................................ 29
6.5 Troubleshooting .................................................................................................................30
6.5.1 Analysis of faults ...............................................................................................................30
6.6Electric drawings for T20R - T20S with LTM...................................................................33
6.6.1 T20R with LTM - LBC - IES (1 start switch - brake end)
- until 10/97 - .................................................................................................................34-35
6.6.2 T20R with LTM - LBC - IES (2 brake pedals switches)
- from 11/97 to 05/98 - ..................................................................................................38-39
6.6.3 T20S with LTM - LBC - IES
- until 10/97 - .................................................................................................................42-43
6.6.4 T20S with LTM - LBC - IES (new speed reduction ratios)
- from 11/97 to 05/98 - ..................................................................................................46-47
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Service Training Contents
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M2 / Chapter 3
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6.7 T20R type 140 with LDC ...................................................................................................49
6.7.1 T20R: Operating the truck .................................................................................................50
6.7.2 T20R: Location of the speed control panel components (LDC).........................................51
6.7.3 T20R: status of LDC control box inputs ............................................................................ 52
6.7.4 T20R: LDC speed control adjustments (Eprom 1.5) .........................................................53
6.7.5 T20R: truck coding ............................................................................................................53
6.7.6 T20R: accelerator..............................................................................................................54
6.7.7 T20R: the brake box 7A4 ..................................................................................................55
6.8 T20S type 144 with LDC ...................................................................................................56
6.8.1 T20S: Operating the truck ................................................................................................. 57
6.8.2 T20S: Location of the speed control panel components (LDC) .........................................58
6.8.3 T20S: status of LDC control box inputs............................................................................. 59
6.8.4 T20S: LDC speed control adjustments (Eprom 1.5).......................................................... 60
6.8.5 T20S: truck coding ............................................................................................................60
6.8.6 T20S: accelerator ..............................................................................................................61
6.9 T20S - T20R: Speed sensor adjustment and control ........................................................62
6.10 Using control units for LDC speed control (Eprom 1.5).....................................................63
6.10.1 Diagnostic menus..............................................................................................................64
6.10.2 Troubleshooting .................................................................................................................70
6.10.3 Error codes displayed in the menus (2), (3), (31) and servicing .......................................73
6.10.4 Truck faults correspondence - Error messages................................................................76
6.10.5 Table of faults in the power circuit ..................................................................................... 78
6.11 Braking ..............................................................................................................................79
6.11.1 Electromagnetic brake control, DIGISOFT .......................................................................79
6.11.2 Electromagnetic brake control, MODITORQUE ...............................................................81
6.11.3 Electrohydraulic brake control...........................................................................................83
6.12 Electrical steering LES ......................................................................................................84
6.12.1 T20S - T20R: LES electric steering description ................................................................85
6.12.2 LES steering operation ......................................................................................................86
6.12.3 Setting the wheel position potentiometers .........................................................................87
6.12.4 LES steering adjustment ...................................................................................................88
6.12.5 Diagnostic adjustment equipment...................................................................................... 88
6.12.6 Adjustment procedures .....................................................................................................88
6.12.6.1 Replacing the position potentiometers...............................................................................89
6.12.6.2 Teaching the steer after replacing the control box 3A1 ..................................................... 91
6.12.7 Using control units for LES speed control .........................................................................93
6.12.8 Troubleshooting with the TEST MODULE unit or PC...................................................... 101
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