MTU Detroit Diesel 12 V 2000 P62, Техническая публикация

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Task Description 99
1 Cylinder A1 is in firing TDC
2 Cylinder A1 is in overlap TDC
I Inlet valve
X Exhaust valve
Checking valve clearance at two crankshaft
positions
1. Check TDC position of piston in cylinder A1:
• The piston is at firing TDC when the rockers
are unloaded at cylinder A1.
• The piston is at overlap TDC when the rockers
are loaded at cylinder A1.
2. Check valve clearance with cold engine:
• Inlet = 0.4 mm;
• Exhaust = 0.6 mm;
3. Check all valve clearances in two crankshaft
positions (firing TDC and overlap TDC of cylinder
A1) as per diagram.
4. Use feeler gauge to determine the distance
between valve bridge and rocker arm.
5. If the deviation from the reference value exceeds
0.1 mm, adjust valve clearance.
Adjusting valve clearance
1. Loosen locknut (1) and unscrew adjusting screw
(2) slightly.
2. Insert feeler gauge between valve bridge and
rocker arm.
3. Readjust adjusting screw (2) so that the feeler
gauge just passes through the gap.
4. Tighten locknut (1) to 50 Nm, holding adjusting
screw (2) firmly with screwdriver.
5. Check whether the feeler gauge just passes
through between valve bridge and rocker arm.
Result: If not, adjust valve clearance.
Final steps
1. Remove barring tool.
2. Follow reverse sequence of working steps for installation.
MS15009/00E 06-09 © MTU