Detroit Diesel 4000 Series, Руководство по обслуживанию, Страница: 694 / 2706

SERIES 4000 12/16V SERVICE MANUAL
To avoid personal injury when barring the engine over,
stand clear so that the crankshaft will not unexpectedly
rotate and cause loss of control of barring tool.
[c] Using the barring tool, bar the engine until the piston of cylinder A1 is in the firing
TDC.
NOTE:
The piston is at firing TDC when both rocker arms are unloaded, i.e. have clearance.
2. Move piston several times up and down through TDC until needle of dial gage registers
its highest reading.
3. Set dial gage to zero.
4. Turn crankshaft against normal direction of rotation to 10 degrees.
5. Turn crankshaft in direction of rotation to 0.3 mm (on dial gage) before TDC.
6. Apply exact mark to index plate (flywheel end) or to crankshaft journal (gear case end),
opposite TDC pointer.
7. To take up bearing play, bar crankshaft in direction of rotation past TDC to approximately
10 degrees.
8. Bar crankshaft in direction opposite to normal direction of rotation to 0.3 mm after TDC.
9. Apply second mark to index plate (flywheel end) or to crankshaft journal (gear case end).
NOTE:
To eliminate bearing clearance, the piston must always move in direction of TDC.
10. Apply third mark at exact center between previous two marks.
11. Align index plate so that mark for cylinder A1 corresponds to pointer.
12. Again check TDC position.
13. Remove measuring device with dial gage.
Measuring Intake Valve Stroke
Perform the following steps to measure intake valve stroke:
1. Start from cylinder A1, turning cylinder A1 to firing TDC.
2. Release locknuts (arrows) and insert adjusting screws until there is no more play.
All information subject to change without notice.
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