| 140 Tractor Tune Up Info |
| Engine Model And Type |
C-123 Gas Fire Crater Piston + |
C-123 Gas Flat Top Piston + |
C-123 Gas ++ |
| Compression Pressure (at cranking speed)(psi) |
175 |
160 |
175 |
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|
|
| High Idle (no load) Engine RPM / PTO RPM |
1575 + or - 25 / 609 |
1575 + or - 25 / 609 |
1575 + or - 25 / 609 |
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|
|
| Low Idle (no load) Engine RPM / PTO RPM |
425 + or - 25 / 164 |
425 + or - 25 / 164 |
425 + or - 25 / 164 |
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|
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| Rated Load Speed Engine RPM / PTO RPM |
1400 + or - 10 / 540 |
1400 + or - 10 / 540 |
1400 + or - 10 / 540 |
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|
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| Horsepower (at load speed) PTO Shaft |
23.7 |
23.2 |
23.7 |
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|
|
| Approximate Fuel Rate (at load speed) gals/hour |
1.98-2.12 |
1.98-2.12 |
1.98-2.01 |
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|
|
| Firing Order |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
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| Valve Lash (hot)(inch) |
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|
|
| Intake |
.014 |
.014 |
.014 |
| Exhaust |
.014 # |
.014 # |
.014 # |
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|
|
|
| Spark Plug Gap (inch) |
.023 |
.023 |
.023 |
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| Distributor |
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|
|
| Symbol |
A B |
A B |
T |
| Breaker Point Opening (inch) |
.020 |
.020 |
.020 |
| Part Number |
372712R91 |
372712R91 |
364696R91 |
| Governor Spring Package |
372785R91 |
372785R91 |
373955R91 |
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| Ignition Timing (spark advance BTDC unless otherwise specified) (degrees) |
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|
|
| At 400 RPM (+ or - 2 Degrees |
1 |
1 |
1 ATDC |
| At high Idle Speed |
22 |
22 |
14 |
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|
|
| Carburetor Liquid level (inches) |
|
|
|
| I.H. |
- |
- |
- |
| Zenith |
1/2 |
1/2 |
1/2 |
| Carter |
- |
- |
- |
| Marvel-Schebler |
3/4 |
3/4 |
3/4 |
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|
|
| Torque Wrench Settings (foot pounds) |
|
|
|
| Cylinder Head |
80-90 |
80-90 |
80-90 |
| Manifold |
33-37 |
33-37 |
33-37 |