Man D2862 LE221, Руководство по ремонту

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CRANK MECHANISM
Connecting rod radial play............................................................................................. 0.060 – 0.128 mm
Connecting rod axial play .............................................................................................. 0.240 – 0.438 mm
Expansion .................................................................................................................................... 2.0 mm
Piston diameter
D1 measured 13 mm above piston bottom edge...................................................... 127.898 – 127.902 mm
Piston ring (keystone ring)
Piston ring (keystone ring)..................................................................................... 3.5 mm (nominal value)
Piston ring width ............................................................................................................... 4.50 – 4.90 mm
Ring gap .......................................................................................................................... 0.45 – 0.55 mm
Piston ring (taper-face ring)
Piston ring height.............................................................................................................. 2.47 – 2.49 mm
Piston ring width ............................................................................................................... 4.90 – 5.30 mm
Axial play ......................................................................................................................... 0.09 – 0.18 mm
Ring gap .......................................................................................................................... 0.45 – 0.55 mm
Piston ring (double-bevelled ring)
Piston ring height............................................................................................................ 3.475 – 3.49 mm
Piston ring width ............................................................................................................... 3.70 – 3.90 mm
Axial play ..................................................................................................................... 0.040 – 0.085 mm
Ring gap .......................................................................................................................... 0.30 – 0.50 mm
Piston height
Overall height................................................................................................................ 115.4 – 115.6 mm
Piston height from middle of piston pin to piston crown / PH level 0 ................................. 78.95 – 79.05 mm
Piston pin/piston pin bore
Piston pin diameter....................................................................................................54.994 – 55.000 mm
Piston pin bore ..........................................................................................................55.063 – 55.093 mm
Pistons
Piston standout measured from crankcase to piston ................................................... -0.361 to +0.080 mm
Important information
WARNING
Component damage due to incorrectly tightened screw/bolt connections
• If impact wrenches are used, these may only be used for pretightening to max. 50% of the
specied tightening torque
• Final tightening must always be performed manually using a torque wrench
WARNING
Crack surfaces are sensitive. The principle involved can cause chipping
• Exchange the connecting rod if the crack surfaces are damaged
• Protect crack surfaces against damage caused by hard and sharp objects
• To clean the crack surfaces on the connecting rods, always rinse them in clean cleaning agent
• After cleaning, use compressed air to blow-dry the crack surfaces
• Make sure washed-out particles do not get into the engine
Note
The piston diameter is always measured perpendicular to the piston pin bore.
324 AE6 3st edition