Technical data

OPERATION&MAINTENANCE MANUAL
dismantling it for cleaning, do not mistake the upper and low shaft bushings (the upper
shaft bushing with oil groove). The thrust plate is locates at the last piece of the main
bearing. Each of the two is located at the front and back end respectively. The thrust
plate bears axial thrust of the crankshaft, with oil groove on the work surface and the
reverse side. After crankshaft assembly is completed, it shall be flexible.
The cylinder sleeve is made of boron cast-iron and of wet type. Flange surface of
the cylinder surface is 0.02-0.10mm higher than the body top to ensure sealing of
cylinder sleeve and head. See figure 6.
Fig.7 Measurement of piston Fig.8Measurement of side surface gap
of piston ring
ring end gap
1. Thickness feeler(gauge ) 2.piston ring 3. Cylinder liner
3、Piston and connecting Rod
The piston connection rod assembly consists of piston, piston ring, piston pin,
retainer ring, connecting rod, connecting rod casing, connecting rod bolt, connecting rod
bushing and connecting rod lining and etc. Mass deviation of the connecting rod
assembly of the piston for the same diesel shall be no more than 3g. ZL109 alloy
aluminum is employed for the piston.
The gaseous ring is made of alloy cast iron. External circle of the first gaseous ring
is coated with porosity chrome, which can reduce abrasion between cylinder sleeve and
piston ring. The second gaseous ring is a taper-face ring, the surface marked TOP faces
the top face. Reversing assembly is not allowed.
Caulking ring is employed for the oil control ring. As its resilience reduces by
29