ENGINE SPECIFICATIONS (YUM1A/YUM2A)
2-4
Valve, valve seat, valve guide
Valve clearance cold
Intake and exhaust side
0.05–0.09 mm (0.0020–0.0035 in)
Valve dimensions
Valve seat contact width (intake)
0.7–0.9 mm (0.0276–0.0354 in)
Valve seat contact width (intake) limit
1.6 mm (0.063 in)
Valve seat contact width (exhaust)
0.7–0.9 mm (0.0276–0.0354 in)
Valve seat contact width (exhaust) limit
1.6 mm (0.063 in)
Valve-stem-to-valve-guide clearance (intake)
limit
0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clearance
(exhaust) limit
0.100 mm (0.0039 in)
Valve stem runout
0.010 mm (0.0004 in)
Valve push rod
Valve push rod runout
0.15 mm (0.006 in)
Valve spring
Free length (intake)
36.2 mm (1.43 in)
Limit
34.4 mm (1.35 in)
Free length (exhaust)
36.2 mm (1.43 in)
Limit
34.4 mm (1.35 in)
Cylinder
Bore
85.000–85.020 mm (3.3465–3.3472 in)
Wear limit
85.050 mm (3.3484 in)
Piston
Piston-to-cylinder clearance
0.043–0.057 mm (0.00017–0.0022 in)
Diameter
84.977–84.998 mm (3.3456–3.3464 in)
Piston pin outside diameter
19.995–20.000 mm (0.7872–0.7874 in)
Limit
19.975 mm (0.7864 in)
Piston pin bore inside diameter
20.0004–20.015 mm (0.7876–0.7880 in)
Limit
20.045 mm (0.7892 in)
Piston-pin-to-piston-pin-bore clearance
0.004–0.020 mm (0.0002–0.0008 in)
Piston ring
Top ring
Ring type
Barrel
End gap (installed) limit
0.60 mm (0.0236 in)
Ring side clearance
0.040–0.080 mm (0.0016–0.0031 in)
2nd ring
Ring type
Taper
End gap (installed) limit
0.80 mm (0.0350 in)
Ring side clearance
0.030–0.070 mm (0.0012–0.0028 in)
Crankshaft
Runout limit
0.05 mm (0.002 in)
Crankshaft pin outside diameter
35.969–35.984 mm (1.4161–1.4167 in)
Crankshaft pin to connecting rod clearance
0.016–0.046 mm (0.0006–0.0018 in)
Summary of Contents for UMAX
Page 1: ...SERVICE MANUAL UTILITY VEHICLE J0F F8197 E1 YUM1A YUM2A YUM2E LIT 19616 A0 37...
Page 2: ......
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Page 25: ...GENERAL SPECIFICATIONS 2 2 1174 kg 2589 lb YUM2E Hill claiming ability 20 YUM1A 15 YUM2A YUM2E...
Page 33: ...ELECTRICAL SPECIFICATIONS YUM1A YUM2A 2 10 USB fuse 5 A...
Page 43: ...TIGHTENING TORQUES 2 20...
Page 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...
Page 48: ...CABLE ROUTING 2 25 YUM1A Left side A B D C 1 2 3 4 4 4 4 5 6 7 8 9...
Page 50: ...CABLE ROUTING 2 27 YUM1A Brake and throttle cables A B 1 3 2 3 1 2 2 4 5...
Page 52: ...CABLE ROUTING 2 29 YUM1A Shift cables 1 2 3 1 2 4 1 2...
Page 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...
Page 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...
Page 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...
Page 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...
Page 64: ...CABLE ROUTING 2 41 YUM2E Front and rear 1 1 2 3 4 3 A...
Page 66: ...CABLE ROUTING 2 43 YUM2E Left side B 2 1 3 4 5 6 7 8 9 10 11 A 9...
Page 68: ...CABLE ROUTING 2 45 YUM2E Brake cable A A B C 1 2 4 3...
Page 70: ...CABLE ROUTING 2 47...
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Page 96: ...4 YEAR CHECKS 3 23...
Page 99: ......
Page 134: ...FRONT SUSPENSION COMPONENTS 4 35 4 3 1 2 5 a...
Page 138: ...REAR SUSPENSION COMPONENTS 4 39...
Page 174: ...CRANKSHAFT AND PISTON 5 35...
Page 196: ...TRANSMISSION YUM1A YUM2A 7 13 Refer to CHECKING THE SHIFT LEVER YUM1A YUM2A on page 3 8...
Page 202: ...TRACTION MOTOR YUM2E 7 19...
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Page 217: ...CHARGING SYSTEM YUM1A YUM2A 8 12...
Page 223: ...LIGHTING SYSTEM YUM1A YUM2A 8 18...
Page 227: ...LIGHTING SYSTEM YUM2E 8 22...
Page 233: ...SIGNALING SYSTEM YUM1A YUM2A 8 28...
Page 243: ...FUEL INJECTION SYSTEM YUM1A YUM2A 8 38...
Page 247: ...FUEL PUMP SYSTEM YUM1A YUM2A 8 42...
Page 284: ...ELECTRICAL COMPONENTS YUM2E 8 79...
Page 313: ...PC GENIUS GOLF CAR PROGRAMMING SYSTEM YUM2E 9 28...
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