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Concrete mixer truck, small mixer truck, small concrete pump truck, small crane

Concrete mixer truck, professional manufacturer of small concrete mixer trucks--Jining Henglian Construction Machinery Co., Ltd.

Henglian Product Classification

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National unified customer service hotline: 400-66 77749

Phone: 0537-2777749

Postcode: 272000

Address: No. 1 Industrial Park, Changgou Town, Rencheng District, Jining City, Shandong Province

Problems and solutions

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Henglian mixer truck analyzes the common faults of the hydraulic system of the mixer truck for you

Release time: 2015-02-02 Visits: 2588 times

Henglian mixer truck analyzes the common faults of the mixer truck hydraulic system for you. Users of mixer trucks can handle various failures of the hydraulic system of mixer trucks according to the situation, creating more benefits for the users of mixer trucks by saving time.


I. Leakage and oil leakage at the connection between the reducer and the tank

a You must first confirm that the reducer oil has been changed after the mixer has reached 100 hours of operating time.

b Check and clean the reducer exhaust valve

c There is too much grease in the bearing during assembly, and sometimes it can be seen outside. It will be exposed to heat during use, clear the oil traces, and eliminate the effect of grease during assembly of the reducer.

d In the installation process, it is not absolutely guaranteed that there is no error. The shaft seal lip seal is not completely linear. There is a phenomenon of reciprocation. Over time, it will be like a cylinder. The grease at the place (not the oil in the reducer, which is added to the bearing during assembly), the stroke drops and flows out.

e For the above two cases, no matter how they are used, the oil in the reducer will not be reduced, but the second case is not conducive to the life of the seal.

Leakage in the suction joint of the charge pump

a All connections of oil pump and motor are in the form of SAE

b Whether the outer edge and height of the machined joint and the countersink on the pump (motor) are appropriate

Leakage of quality check of charge pump and main pump

a Caused by pollution during such a failure

b It is recommended to check the charge pressure before replacing the gasket. It will be found that the charge pressure is not at the normal 24bar, but has a very high rise.

c It is best to replace the mortgage relief valve at the same time that the gasket is replaced (cleaning is effective, but may happen again).

Fourth, the oil pump shaft seal leaks oil

a It is best to check the pressure of the pump casing, not more than 5bar

b Shaft seal replacement

c Cardan shaft should have free expansion and contraction

V. Oil leakage at the interface between the motor and the reducer

a Check the motor flange seal

b Replace O-ring

Wear of oil pump shaft and spline sleeve

a It is strongly recommended that when installing the spline sleeve, add Loctite to the oil pump shaft spline and the inside of the spline sleeve, and reload the vehicle after 24 hours.

b Fixed by screws, there is a hidden danger of loosening during the running of the car, which will cause wear and tear.

Seven, the mixer truck periodically shakes

a The phenomenon is that there are two vibrations in each revolution of the mixing tank, and in severe cases, the motor's drain pipe will be beaten.

b. Check the working and return pressure, which will change periodically as the tank rotates

c Restricted, fully aware of the residue in the tank irrigation

d Calibration tank center of gravity

High temperature

a Reducer, whether the oil is changed on time (the first oil change time, working for 150 hours), dirty oil affects the circulating cooling of the reducer (the maximum oil temperature of the reducer must not exceed 85-90 ℃).



b. Whether the hydraulic pump, motor, cooling fan starts normally, and whether the cooling pipe is blocked. The drain pipe must be from the motor drain port to the oil pump drain port, and then from the oil pump drain port to the fuel tank.



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