| Farmall 400 And W-400 Tractor Tune Up Info |
| Engine Model And Type |
C-264 Gas |
C-264 Dist. |
C-264 LPG |
C-281 Fire Crater Piston * |
C-281 Dist. Flat Top Piston * |
C-281 LPG Fire Crater Piston * + |
C-281 LPG Flat Top Piston * ++ |
| Compression Pressure (at cranking speed)(psi) |
138 |
92 |
175 |
135 |
89 |
197 |
223 |
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| High Idle (no load) Engine RPM / PTO RPM |
1595 / 587 |
1595 / 587 |
1595 / 587 |
1595 / 587 |
1595 / 587 |
1595 / 587 |
1595 / 587 |
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| Low Idle (no load) Engine RPM / PTO RPM |
425 / 157 |
425 / 157 |
500 / 184 |
425 / 157 |
425 / 157 |
500 / 184 |
500 / 184 |
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| Rated Load Speed Engine RPM / PTO RPM |
1450 / 534 |
1450 / 534 |
1450 / 534 |
1450 / 534 |
1450 / 534 |
1450 / 534 |
1450 / 534 |
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| Horsepower (at load speed) PTO Shaft |
48.3 |
36.9 |
48.3 |
51.6 |
40.2 |
51.6 |
51.6 |
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| Approximate Fuel Rate (at load speed) gals/hour |
3.97-4.21 |
3.64-3.86 |
5.26-5.57 |
4.80-5.20 |
4.47-4.85 |
6.09-6.56 |
6.15-6.62 |
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| Firing Order |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
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 |
.017 |
.017 |
.017 |
.017 |
.017 |
.017 |
.017 |
| Exhaust |
.017 |
.017 |
.017 |
.017 |
.017 |
.017 |
.017 |
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| Spark Plug Gap (inch) |
.023 |
.023 |
.015 |
.023 |
.023 |
.015 |
.015 |
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| Distributor |
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| Symbol |
N |
J |
T |
N |
J |
T |
T |
| Breaker Point Opening (inch) |
.020 |
.020 |
.020 |
.020 |
.020 |
.020 |
.020 |
| Part Number |
362473R91 |
357935R91 |
364696R91 |
362473R91 |
357935R91 |
364696R91 |
364696R91 |
| Governor Spring Package |
362478R91 |
358108R91 |
373955R91 |
362478R91 |
358108R91 |
373955R91 |
373955R91 |
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| Ignition Timing (spark advance BTDC unless otherwise specified) (degrees) |
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| At 400 RPM (+ or - 2 Degrees |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| At high Idle Speed |
25 |
30 |
16 |
25 |
30 |
16 |
16 |
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| Carburetor Liquid level (inches) |
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| I.H. |
9/16 |
9/16 |
- |
9/16 |
9/16 |
- |
- |
| Zenith |
- |
- |
- |
- |
- |
- |
- |
| Carter |
- |
- |
- |
- |
- |
- |
- |
| Marvel-Schebler |
- |
- |
- |
- |
- |
- |
- |
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| Torque Wrench Settings (foot pounds) |
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| Cylinder Head |
110 |
110 |
110 |
110 |
110 |
110 |
110 |
| Manifold |
50 |
50 |
50 |
50 |
50 |
50 |
50 |