Email:eric@shunyumachinery.com Yancheng Shunyu Agriculture Machinery Co.,Ltd

Yancheng Shunyu Agriculture Machinery Co.,Ltd

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Yancheng Shunyu Agriculture Machinery Co.,Ltd

Address:Wengang South Road 59#, Yancheng City, Jiangsu Province, China

Tel:+86-515-8860-7757

Fax:+86-515-8860-7757

Phone:+8618921887735

Email:eric@shunyumachinery.com

     

Diesel engine cylinder head assembly disassembly and cylinder head crack inspection method

For small and medium-power diesel engine, the cylinder head of the multi-cylinder machine is the cylinder head of all the cylinders are molded together into a unified multi-cylinder cylinder head, so compact, small size. Cylinder head is the most complex structure of the diesel casting, the main function is to seal the cylinder, and the piston and the cylinder wall to form a combustion chamber. Now the diesel engine cylinder head assembly disassembly and cylinder head crack inspection methods are described below, for diesel engine maintenance personnel and agricultural vehicle driver reference.

First, the diesel engine cylinder head assembly disassembly

    1. Diesel engine cylinder head assembly demolition

    (1) First, the air filter, muffler and into the exhaust pipe removed.

    (2) Remove the injector assembly. Before removing the fuel injection pump assembly, remove the high pressure tubing, return line, and then loosen the fuel filler plate nut, remove the pressure plate, remove the injector assembly.

    (3) Remove the oil pressure pipe pipe bolts, cylinder head cover nut, the cylinder cover with the gasket removed together.

    (4) Loose the valve shaft arm shaft seat fixing nut, remove the valve rocker arm assembly, withdraw the valve putter.

    (5) Remove the cylinder head, cylinder pad. When removing the cylinder head, pay attention to the removal order of the cylinder nut. Loosen the cylinder head nut in diagonal staggered order.

    (6) the cylinder head flat, the use of special tools to disassemble the valve, press the valve spring, remove the valve lock, remove the valve spring, spring seat, out into the exhaust valve. Note: If there is no special tool for disassembly, can also be used two iron pipe or iron bar demolition.

    (7) Finally remove the valve guide, intake valve seat and exhaust valve seat.

Second, the cylinder head crack inspection method

     With metal objects gently tapping, such as the sound is not crisp and hoarse, there are cracks. Then look carefully and find the range of cracks. Such as can not find the use of professional equipment for hydrostatic test, after the pressure of the site is the location of the crack. If there is no professional equipment, can be 75% of the oil and 25% kerosene mixture applied to the site to be inspected, and then dry with a dry cotton to wipe the mixture and immediately coated with a layer of zinc oxide solution, the solution changes color Where the crack is located.


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