MASSEY FERGUSON MF 6713 S - 10 Electricity; 10.1 Diagnostic procedure; 10.2 Electrical circuit

9.15 GPA20/Open Center/Auxiliary spool valves .......................9-205
9.15.1 General .....................................................9-205
9.15.2 Principles of operation ..........................................9-207
9.15.2.1 Operation of the flow divider ...............................9-207
9.15.2.2 3-position spool valve, SE/DE with return to neutral by spring .......9-208
9.15.2.3 3-position spool valve, SE/DE with automatic return to neutral .......9-211
9.15.2.4 3-position SE/DE spool valve with non-return valve and automatic return
............................................................9-212
9.15.2.5 Four-position DE spool valve, with automatic return to neutral and
floating position ...............................................9-214
9.15.3 Schematic diagram ............................................9-216
9.15.4 Layout of components ..........................................9-219
9.15.4.1 Blown-up view .........................................9-219
9.15.5 Layout of ports and channels .....................................9-221
9.15.6 Adjustments and bleeding .......................................9-223
9.15.6.1 Adjusting the flow divider .................................9-223
9.15.7 Disassembly/reassembly ........................................9-223
9.15.7.1 Removing/refitting the spool valves ..........................9-223
9.15.7.2 Fitting and adjusting the control cables ........................9-225
9.16 GPA20/Open Center/Valve ......................................9-230
9.16.1 General .....................................................9-230
9.16.2 Description of the 21-bar low pressure valve .........................9-230
9.16.3 Layout of components ..........................................9-232
9.16.3.1 Identification of ports ....................................9-233
9.16.4 Adjusting the 21 bar valve .......................................9-233
9.16.5 Disassembly/reassembly ........................................9-233
9.16.5.1 Removing/refitting and disassembling/reassembling the 21-bar valve . 9-233
9.16.5.2 Assembling the 5 bar valve ................................9-234
10 Electricity ..............................................................10-1
10.1 Diagnostic procedure .............................................10-3
10.1.1 List of generic procedures ........................................10-3
10.1.2 Checking the insulation of a harness .................................10-3
10.1.3 Checking the continuity of a harness ................................10-3
10.1.4 Checking the CAN network .......................................10-5
10.1.5 Checking a harness .............................................10-7
10.1.6 Measuring a voltage ............................................10-7
10.1.7 Measuring the resistance of a component ............................10-8
10.1.8 Measuring current ..............................................10-8
10.1.9 Hook-on ammeter procedure ......................................10-8
10.1.10 Ammeter procedure ...........................................10-9
10.2 Electrical circuit .................................................10-10
10.2.1 General .....................................................10-10
10.2.1.1 General ..............................................10-10
10.2.1.2 Principles of operation ....................................10-11
10.2.1.3 Electricity - color code ....................................10-11
10.2.1.4 Schematic diagram of the electrical circuit .....................10-12
10.2.2 Layout of components ..........................................10-13
10.3 Fuse box .......................................................10-15
10.3.1 General .....................................................10-15
10.3.1.1 General ..............................................10-15
10.3.1.2 Principles of operation ....................................10-15
10.3.2 Layout of components ..........................................10-16
10.3.2.1 Fuse box - Connectors ...................................10-16
10.3.3 Disassembly/reassembly ........................................10-17
10.3.3.1 Tightening torques ......................................10-17
10.3.3.2 Removing and refitting the fuse box ..........................10-17
Table of contents
MF 6700 S series tractors
ACT0025630