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5
To inspect and to overhaul
Note: Check the crankshaft for cracks before and after it is ground. Demagnetise the crankshaft after it has
been checked for cracks.
After the crankshaft has been machined, remove any sharp corners from the lubricating oil holes. Surface
finish and fillet radii must be maintained.
Further information can be found in the relevant Data and dimensions for the "Crankshaft" on page 22.
Caution: After the crankshaft has been overhauled, it must be thoroughly cleaned and the oil holes inspected
for debris.
Crankshaft heat treatment
The crankshaft is induction hardened. On UC engines the fillet radii are also induction hardened.
Note: Induction hardened crankshafts need not be hardened after they have been machined undersize.
To inspect
Check the crankshaft for wear and other damage. The maximum permissible wear and ovality on the
crankshaft journals and crank pins is 0,04 mm (0.0016 in).
The main journals and the crank pins of standard size crankshafts can be machined to 0,25 mm (0.010 in),
0,50 mm (0.020 in) or 0,75 mm (0.030 in) undersize on diameter, refer to the relevant Data and dimensions for
the "Crankshaft" on page 22. Special undersize bearings are available.
If the seal position on the crankshaft palm is worn, a wear sleeve can be fitted to the palm, see Operation 5-14.
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This document has been printed from SPI². Not for Resale
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Workshop Manual, TPD 1392E, issue 3
700 Series
Operation 5-13
Continued
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