2.13. Cylinder block
Characteristics of the device
The cylinder block is launched of the low form iron connected specially. The cylinders diameters are broken in classes. The class of the cylinder is marked in the lowest airplane of the cylinder block.
The possibility of boring ones of cylinders below the pistons of repair increased in the diameter is supplied.
The coverings of radical loads are prosecuted together with the cylinder block, therefore, are not exchanged and for the distinction they have etiquettes of an extern surface.
To check
Carefully the dish does the cylinder block, clear lubricating channels.
Having taken and having dried compressed air, examine the cylinder block. The slits at any place of the cylinder block are not allowed.
If there is a suspicion in the blow of cooling the liquid in a case of motor, then check the tension of the cylinder block in the special bookcase. With this finality, having deadened openings of the shirt that cools of the cylinder block, pump in him the water of the room temperature below the pressure of 0,3 MPas (3 kgfs/cm2). Inside 2 hole of a water minute of the block must not be observed.
If the oil will come to the liquid cooling, then without the desmontagem full of the check of motor if the cylinder block has slits in zones of channels of oil. With this deep finality the liquid of the system of cooling, withdraw a head of the cylinder block, fill a shirt of the cooling of the cylinder block with the water and give the air pressed to the channel of vertical oil of the cylinder block. In case of air bottles in the water that fills a shirt that cools they substitute the cylinder block.
Check the airplane of the capture of the cylinder block a block heads a sovereign and group of probes. The sovereign is established in airplane diagonals in the environment, in the longitudinal direction and across, the admission of planeness does 0,15 mm.
Examine cylinders.
The diameter of measure of each cylinder in the top, average and more low it puts his parts in parallel to an axle of an end of inclination.
Diameter of measure of each cylinder in the top, average and more low his parts perpendicular to an axle of an end of inclination.
Conicity of the cylinder is calculated like a difference between the top and the lowest diameters, ovality – like a difference between parallel and perpendicular measurements.
If the received results do not coincide with technical demands, they direct experts.
The step use in the superior part of the cylinder is withdrawn through the development.
In pistons of spare pieces of four I repair sizes they are handed.
Sizes of repair and marking of pistons:
increased in 0,25 mm.... 0,25
increased in 0,50 mm.... 0,50
increased in 0,75 mm.... 0,75
increased in 1,00 mm.... 1,00
When boring cylinders to the repair size it is necessary to guard the necessary slit between pistons of the size of repair and cylinders and to install pistons of the size of identic repair.
The diameter of the piston measures in the distance of 47 mm of the bottom of piston in the right angle the pulls.
Split between the piston and the cylinder of the motor, mm:
with a volume of work of 1,3/1,1 l..... 0,02-0,04
with a volume of work of 1,5 l..... 0,02-0,04
with a volume of work of 1,6 l..... 25-0.045