The basic requirements of the engineering machinery overhaul

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Technical appraisal before the overhaul 1
At present, engineering machinery overhaul is recovery of its performance, the machine after a longer period of time after the operation, the main part and assembly aging has reached its limit, it should be all the disintegration machine, cleaning, inspection and repair, make its performance reach the factory standard.
Engineering machinery overhaul is needed before the technical appraisal, by the use of units responsible for the technical management, hosting, repair and driving personnel to participate in, before detection, no pressure, temperature and flow rate of the disintegration of the torque performance of each part of the machine, and data review documents and operation record, with assessment of fuel oil and lubricating oil consumption, and make a detailed record. Then the relevant parameters and overhaul of original manufacturer provided by comparison, to determine whether the need to overhaul.
Determination of main technical conditions of construction machinery is in need of overhaul is:
The index of dynamic performance of the engine is decreased more than 20%; the oil consumption of more than 1 times the value of the above quota; cylinder pressure engine reach more than 45 DEG C in temperature measurement is not up to the specified index 60%.
The transmission mechanism of the main parts wear reached their limit, a deflection, abnormal noise, impact and dithering.
The steering mechanism of wear gap is too large, the manipulation of failure; transmission gear and shaft wear serious, difficult shift or often jump block; brake mechanism of serious wear and tear, braking performance degradation or failure, and cannot be adjusted.

The frame body deformation or crack; working device wear serious, disabling; unable to complete the normal workload, or the precision of the operation is not up to the requirements; the walking mechanism of serious wear and tear, is unable the normal work. 2 repair method choice
Engineering machinery into the factory overhaul, grouping, measurement, inspection and identification of the disintegration of the partial response, and the various components of the assembly and engine cylinder, crankshaft etc of abrasion detection, in order to obtain whether replacing basis. General to wear large moving parts need to be replaced; for some inconvenient replacement parts, should adopt the welding process, thermal spraying, brush plating and chrome and restore its original design dimensions. In order to ensure quality, in need of replacement parts should be zero accessories to buy the original manufacturer or designated collaboration factory in accordance with the requirements of the.
Repair method is divided into: car repair and replace the assembly repair. Vehicle repair method, is in the repair process will be removed from the machine parts in turn, after cleaning, detection, classification and repair or replace, and re assembly, in order to achieve the method of repair recovery performance. Vehicle repair method occupy downtime longer repair time.
Around this issue, different scholars have conducted a lot of research from different angles, and put forward a lot of dynamic seal theory, the following introduces several typical theory of hydraulic reciprocating seal.

ID Part Number 62983 NKIA5912 INA 62982 NKIA5911 INA 62981 NKIA5910 INA 62980 NKIA5909 INA 62979 NKIA5908 INA 62978 NKIA5907 INA 62977 NKIA5906 INA 62976 NKIA5905 INA

234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984

Introduction

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