TROUBLESHOOTING (YUM1A/YUM2A)
9-2
SHIFT LEVER DOES NOT MOVE
Shift shaft and shift forks
• Bent shift shaft
• Seized shift fork
Transmission
• Seized transmission gear
• Foreign object between transmission gears
• Improperly assembled transmission
FAULTY DRIVE TRAIN PERFORMANCE
Engine operates but vehicle will not move
1. V-belt
• Bent, damaged or worn V-belt
• Slipping V-belt
2. Primary sheave weight and primary sheave
slider
• Damaged or worn primary sheave weight
• Damaged or worn primary sheave slider
3. Transmission gear(s)
• Damaged transmission gear
Poor starting performance
1. V-belt
• V-belt slips
• Oil or grease on the V-belt
2. Primary and secondary sheaves
• Faulty operation
• Worn secondary sheave spring
Poor speed performance
1. V-belt
• Oil or grease on the V-belt
2. Primary sheave weight(s)
• Faulty operation
• Worn primary sheave weight
3. Primary fixed sheave
• Worn primary fixed sheave
4. Primary sliding sheave
• Worn primary sliding sheave
5. Secondary fixed sheave
• Worn secondary fixed sheave
6. Secondary sliding sheave
• Worn secondary sliding sheave
OVERHEATING
Engine
1. Clogged cooling air passages
2. Cylinder head and piston
• Heavy carbon buildup
3. Engine oil
• Incorrect oil level
• Incorrect oil viscosity
• Inferior oil quality
Cooling system
1. Cooling system
• Clogged engine cooling inlet duct
• Damaged flywheel fin
Fuel system
1. Throttle body
• Faulty throttle body
• Damaged or loose intake manifold
2. Air filter
• Clogged air filter element
Chassis
1. Brake(s)
• Dragging brake
Electrical system
1. Spark plug
• Incorrect spark plug gap
• Incorrect spark plug heat range
2. Ignition system
• Faulty ECU
POOR BRAKING PERFORMANCE
• Worn brake shoe
• Worn or rusty brake drum
• Incorrect brake pedal free play
• Incorrect brake shoe adjuster position
• Incorrect brake shoe position
• Damaged or fatigued brake shoe spring
• Oil or grease on the brake shoe
• Oil or grease on the brake drum
FAULTY SHOCK ABSORBER ASSEMBLY
Malfunction
• Fatigued or damaged shock absorber spring
• Bent or damaged damper rod
• Leaking oil
UNSTABLE HANDLING
1. Steering wheel
• Bent or improperly installed steering wheel
2. Steering components
• Incorrect toe-in
• Bent steering shaft
• Improperly installed steering shaft
• Damaged bearing
Содержание UMAX
Страница 1: ...SERVICE MANUAL UTILITY VEHICLE J0F F8197 E1 YUM1A YUM2A YUM2E LIT 19616 A0 37...
Страница 2: ......
Страница 6: ......
Страница 8: ......
Страница 25: ...GENERAL SPECIFICATIONS 2 2 1174 kg 2589 lb YUM2E Hill claiming ability 20 YUM1A 15 YUM2A YUM2E...
Страница 33: ...ELECTRICAL SPECIFICATIONS YUM1A YUM2A 2 10 USB fuse 5 A...
Страница 43: ...TIGHTENING TORQUES 2 20...
Страница 46: ...CABLE ROUTING 2 23 YUM1A Front and rear A B C 1 1 1 1 2 3 4 3 4 1 2 3 4 5 6...
Страница 48: ...CABLE ROUTING 2 25 YUM1A Left side A B D C 1 2 3 4 4 4 4 5 6 7 8 9...
Страница 50: ...CABLE ROUTING 2 27 YUM1A Brake and throttle cables A B 1 3 2 3 1 2 2 4 5...
Страница 52: ...CABLE ROUTING 2 29 YUM1A Shift cables 1 2 3 1 2 4 1 2...
Страница 53: ...CABLE ROUTING 2 30 1 Shift control cable forward 2 Shift control cable reverse 3 Plastic band 4 Reverse switch...
Страница 54: ...CABLE ROUTING 2 31 YUM2A Frame top view A B C 1 1 1 2 3 4 5 6 7 8 1 1 1 1 1 2 3 6 9 10 11 12 13 14 15 16 D E...
Страница 56: ...CABLE ROUTING 2 33 YUM2A Front and rear A B C D 1 1 1 1 1 2 2 3 3 4 4 3 4 5 6 7...
Страница 58: ...CABLE ROUTING 2 35 YUM2A Left side A B C D 1 2 3 4 4 4 4 6 7 8 9 10 5...
Страница 60: ...CABLE ROUTING 2 37 YUM2A Brake throttle and shift cables A A B C D 1 1 2 3 3 4 5 4 5 6 6 7 8 9...
Страница 62: ...CABLE ROUTING 2 39 YUM2E Frame top view A A B 1 2 3 4 5 6 7 C D E E 6 6 6 8 9 10 11 12...
Страница 64: ...CABLE ROUTING 2 41 YUM2E Front and rear 1 1 2 3 4 3 A...
Страница 66: ...CABLE ROUTING 2 43 YUM2E Left side B 2 1 3 4 5 6 7 8 9 10 11 A 9...
Страница 68: ...CABLE ROUTING 2 45 YUM2E Brake cable A A B C 1 2 4 3...
Страница 70: ...CABLE ROUTING 2 47...
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Страница 96: ...4 YEAR CHECKS 3 23...
Страница 99: ......
Страница 134: ...FRONT SUSPENSION COMPONENTS 4 35 4 3 1 2 5 a...
Страница 138: ...REAR SUSPENSION COMPONENTS 4 39...
Страница 174: ...CRANKSHAFT AND PISTON 5 35...
Страница 196: ...TRANSMISSION YUM1A YUM2A 7 13 Refer to CHECKING THE SHIFT LEVER YUM1A YUM2A on page 3 8...
Страница 202: ...TRACTION MOTOR YUM2E 7 19...
Страница 205: ......
Страница 217: ...CHARGING SYSTEM YUM1A YUM2A 8 12...
Страница 218: ...CHARGING SYSTEM YUM2E 8 13 CHARGING SYSTEM YUM2E CIRCUIT DIAGRAM R R B R B B B B 27 28 27 Battery 28 Charging receptacle...
Страница 223: ...LIGHTING SYSTEM YUM1A YUM2A 8 18...
Страница 227: ...LIGHTING SYSTEM YUM2E 8 22...
Страница 233: ...SIGNALING SYSTEM YUM1A YUM2A 8 28...
Страница 243: ...FUEL INJECTION SYSTEM YUM1A YUM2A 8 38...
Страница 247: ...FUEL PUMP SYSTEM YUM1A YUM2A 8 42...
Страница 284: ...ELECTRICAL COMPONENTS YUM2E 8 79...
Страница 313: ...PC GENIUS GOLF CAR PROGRAMMING SYSTEM YUM2E 9 28...
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Страница 316: ......