How to correctly maintain the roller       

1 cylinder clearance measurement is not allowed

When measuring, the clearance of the long axis of ellipse should be defined, that is to measure the clearance of piston skirt perpendicular to the direction of piston pin hole. The measurement is convenient and accurate.

2 new products without matching

Second hand roller replacement cylinder sleeve piston must check the standard cylinder liner and piston size grouping code, the cylinder sleeve and piston must make the size of the two groups grouping code the same, in order to ensure the standard fit clearance.

3 emery cloth polishing pad

Many maintenance workers to increase the contact surface tile and shaft, with emery cloth polishing pad, because of hard alloy grinding sand, soft sand, when it is easy to embed in the alloy, when the engine works to accelerate bearing wear, shorten the service life of the crankshaft.

4 oil only add no change

There are many mechanical impurities in the used oil, even if it is exhausted, there is still impurities in the oil pan and the oil circuit.

5 heating piston with open flame

Direct fired heater piston, piston parts of uneven thickness of thermal expansion and contraction degree, easy to cause deformation, such as up to a certain temperature, natural cooling of metal structure will damage and reduce the wear resistance and service life will be shortened.

6 grease with chaos.

Some second-hand roller repair installation of cylinder pad, love is coated with a layer of grease in the cylinder head gasket, cylinder pad not only requires high temperature and high pressure gas tight seal cylinder produced, but also the cooling water and the oil has a certain pressure and flow rate of sealing the cylinder cover and the cylinder, the cylinder pad grease when the cylinder cover, tighten the bolts, part of grease will be squeezed into the cylinder and the oil path channel, in between the lubricating oil cylinder pad in the cylinder, high temperature and high pressure gas easily from shock, damaged cylinder gasket, resulting in leakage. In addition, the grease will produce carbon deposition for a long time at high temperature, resulting in premature aging of cylinder gasket

The 7 tank "boil" sudden cold

Sudden cold, because the temperature is too large, will lead to the cylinder head and the cylinder block "burst". Therefore, use once found the tank "boil", should take emergency measures to ensure that the engine cooling water to cool.

8 tire pressure is too high

Tire pressure is too high or too low will affect its service life, but also adverse to safe driving.

9 the bolts are screwed too tight

The pre tightening force causes the screw and bolt to break or thread slide.