Failure Analysis of Fracture of Outlet Valve Washer

A R175A diesel engine in the spring before the overhaul of the maintenance of cylinder liner replacement, piston, piston rings, valves and races, connecting rod, the supply of three precision couplings, there are still difficult to start the fault, and barely started after the operation Strenuous, no significant increase in engine speed when fueling the door. The inspection found insufficient pump oil pressure, decomposition pump, found that the valve gasket was significantly scratched, and there is a fracture. Turned out to replace the original valve when the hand with a screwdriver pry out the valve gasket accidentally broken, so that the fuel pump high, low oil collusion, resulting in the failure. Replacement of a new oil valve gasket troubleshooting. As the oil valve gasket installed pressure, reduced diameter, tight hoop in the valve seat, pry easily damaged, therefore, the replacement of the oil valve valve should be replaced at the same time the gaskets.

QY25K

25ton Hydraulic Telescopic Boom Truck Crane XCMG Truck Crane QY25 QY25K QY25K5D With Competitive Price

QY25K5D is the most popular model of China 25t truck crane, is technology crystallization which our company applies for many years manufacturing experience,bases on the mature technology. It is widely used for lifting operation and installation work in urban renewal, transportation, ports, bridges, oilfield, industrial and mining enterprises, etc.

Advantages and highlights:

1.Bi-hexagonal cross-section boom has small depth-width ratio, strong bearing capacity, small deformation, strong anti-bending and powerful lifting capacity.

2.The main boom length is 10.7m to 34m, completely surpassing its rivals with excellent lifting capacity.

3.Steel plate for main boom is BS700MC, lifting performance of fully-extended boom improves 10~20%, exceeding its rival 1~7%.

4. Plug-in boom head effectively increases the boom connect length and reduces boom deformation.

5. It has superior travel and grade ability. The max. grade ability is 40%, max. travel speed is 80km/h.

6. Open fixed displacement pump and variable displacement motor system is adopted. The load sensitive system that researched and developed by ourselves contributes to smooth operation, high efficiency and energy saving. High pressure variable displacement motor contributes to light load with high speed and heavy load with low speed.

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Xuzhou Xuqi Heavy Machinery Co., Ltd. , https://www.xqheavy.com