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Electrical Troubleshooting
Section 4
Page 22
Test 8. ANTI-ROLLOFF FAULT
The Sevcon Controller is equipped with a feature called Anti-Rolloff. Anti-Rolloff will
automatically slow the vehicle if it starts to roll. Anti-Rolloff is active when the key switch has
been left in the “ON” position and the accelerator pedal is not depressed. Anti-Rolloff is
deactivated when the key switch is in the “OFF” position When the key switch is in the “ON”
position and the truck is stationary, the controller supplies a small current to the field. This
current is used to sense if the armature is rotating. As the armature begins to rotate, the
controller senses a fault condition and then supplies current to the field opposing the armature
rotation, slowing the vehicle.
Refer to Motor Specifications Table for information on the maximum allowable field current
when the Anti-Rolloff feature is active.
To test the Anti-rolloff feature:
Park the vehicle on a flat level surface, turn the key switch OFF and apply the parking brake.
Connect an analog Ammeter in series with the motor field windings or a clamp on Ammeter on
one of the field wires that is capable of reading up to 25-Amps.
Place the forward and reverse switch in the center OFF position and turn the key switch ON
TEST #8.1
Read the motor field current on the Ammeter.
If the field current is greater than specified in the Motor Specification table (see Drive
Motor section for specifications), then the Anti-Rolloff feature has failed. Check the
status of the Anti-Rolloff feature using the hand held calibrator (62-027-61).
TEST #8.2
While monitoring the motor field current, release the park brake, and push the vehicle.
Within approximately 10-feet, the field current should rise dramatically and the vehicle should
become difficult to push. Now stop pushing the vehicle and allow it to come to a complete stop.
The field current should drop down below the value specified in the Motor Specification table.
This indicates that the Anti-Rolloff feature is operating normally.
If the current does not rise, then the Anti-Rolloff feature has failed or has been turned
off.
The status of the Anti-Rolloff feature can be checked with the hand held calibrator.
If the Anti-Rolloff feature is on and the field current did not rise, then the controller has
failed and must be replaced.
If the Anti-Rolloff feature is off then the controller logic must be reprogrammed. Contact
your dealer.
The surface must be level for this test. Do not attempt to test the
Anti-Rolloff by pushing up or down an incline. Testing by pushing up
or down an incline could result in injury or property damage.
Summary of Contents for B0-T48-48 Taylor Truck T48
Page 2: ......
Page 4: ......
Page 10: ......
Page 11: ...INTRODUCTION Operator and Maintenance Manual...
Page 16: ...INTRODUCTION PAGE vi MB T48 01...
Page 17: ...SECTION 1 Vehicle Description and Specifications...
Page 23: ...SECTION 2 Safety Rules and Operational Information...
Page 37: ...SECTION 3 Maintenance and Service Procedures...
Page 43: ...SECTION 3 PAGE 7 MB T48 01 Hydraulic Disc Brakes...
Page 52: ...SECTION 3 PAGE 16 MB T48 01 PARKING BRAKE...
Page 54: ...SECTION 3 PAGE 18 MB T48 01 FRONT AXLE AND YOKES...
Page 70: ...SECTION 3 PAGE 34 MB T48 01...
Page 71: ...SECTION 3 PAGE 35 MB T48 01 DRIVE SERVICE...
Page 87: ...SECTION 3 PAGE 51 MB T48 01 SPEED CONTROLLER...
Page 89: ...SECTION 3 PAGE 53 MB T48 01 DRIVE MOTOR...
Page 97: ...SECTION 3 PAGE 61 MB T48 01 BATTERY...
Page 102: ...SECTION 3 PAGE 66 MB T48 01...
Page 150: ...Electrical Troubleshooting Section 4 Page 37...
Page 154: ...SECTION 5 PAGE 4 MB T48 01 1 2 3 4 STEERING SLEEVE ASSEMBLY 5 1 5...
Page 156: ...SECTION 5 PAGE 6 MB T48 01 FRONT SUSPENSION 1 5 6 3 4 2 5...
Page 158: ...SECTION 5 PAGE 8 MB T48 01 1 2 3 4 DRAG LINK 2 5 1 5...
Page 160: ...SECTION 5 PAGE 10 MB T48 01 STEERING GEAR 1 2 3 4 5 6 11 12 13 15 17 16 14 10 9 8 7...
Page 162: ...SECTION 5 PAGE 12 MB T48 01 STEERING COLUMN ASSEMBLY 1 2 3 4 5 6 7 9 8 12 10 11 13 14...
Page 164: ...SECTION 5 PAGE 14 MB T48 01 MASTER CYLINDER BRAKE LINE HARDWARE AND FRONT BRAKE ASSSEMBLY...
Page 166: ...SECTION 5 PAGE 16 MB T48 01 MASTER CYLINDER 2 3 4 1 5 6 7 8...
Page 168: ...SECTION 5 PAGE 18 MB T48 01 HYDRAULIC DISC BRAKES 1 2 8 6 5 4 3 2 1 1 1 1 3 7 1 0 9 14 1 5 1 6...
Page 170: ...SECTION 5 PAGE 20 MB T48 01 PARK BRAKE LINKAGE 9 8 6 1 1 7 1 2 3 1 1 1 0 4 5...
Page 172: ...SECTION 5 PAGE 22 MB T48 01 1 0 9 8 1 1 7 6 3 2 1 6 4 5 MOTOR...
Page 178: ...SECTION 5 PAGE 28 MB T48 01 CONTROL PANEL 1 2 4 5 6 7 3 8...
Page 180: ...SECTION 5 PAGE 30 MB T48 01 1 2 4 6 8 ELECTRICAL COMPONENTS TYPICAL 10 3 5 9 7 11...
Page 186: ...SECTION 5 PAGE 36 MB T48 01 ACCELERATOR MODULE 1 8 2 3 4 5 6 7...
Page 196: ...SECTION 5 PAGE 46 MB T48 01 1 2 4 3 5 6 DECALS 7...
Page 198: ...SECTION 5 PAGE 48 MB T48 01 HITCH OPTIONS...
Page 200: ...SECTION 5 PAGE 50 MB T48 01...
Page 201: ...SECTION 5A Illustrated Parts List Taylor Truck...
Page 202: ...SECTION 5A PAGE 2 MB T48 01 STANDARD PARTS...
Page 204: ...SECTION 5A PAGE 4 MB T48 01 OPTIONAL PARTS...
Page 206: ...SECTION 5A PAGE 6 MB T48 01 OPTIONAL PARTS...
Page 208: ...SECTION 5A PAGE 8 MB T48 01 OPTIONAL PARTS...
Page 210: ...SECTION 5A PAGE 10 MB T48 01 TOP COVER OPTION PARTS...
Page 212: ...SECTION 5A PAGE 12 MB T48 01 DOOR OPTIONS...
Page 214: ...SECTION 5A PAGE 14 MB T48 01 DECKBOARD OPTIONS...
Page 216: ...SECTION 5A PAGE 16 MB T48 01 BOX WITH DOORS OPTIONS...
Page 218: ...SECTION 5A PAGE 18 MB T48 01 STAKE SIDE OPTIONS...
Page 220: ...SECTION 5A PAGE 20 MB T48 01...
Page 221: ...SECTION 5B Illustrated Parts List ET 3000...
Page 222: ...SECTION 5B PAGE 2 MB T48 01 1 2 7 8 3 4 5 5a 9 11 12 13 14 16 10 STANDARD PARTS 6 18 17 15...
Page 224: ...SECTION 5B PAGE 4 MB T48 01 STANDARD PARTS 3 4 5 6 1 2 Door Latch 9 8 7...
Page 230: ...SECTION 5B PAGE 10 MB T48 01 BOX WITH DOORS OPTIONS...
Page 232: ...SECTION 5B PAGE 12 MB T48 01...
Page 233: ...APPENDIX A Special Tools...
Page 235: ...APPENDIX B...
Page 239: ......