Repair of leading bridges of KamAZ vehicles

Contents

CONTENTS

Introduction

Machine, its purpose and device

1.2 Technical capabilities and technical characteristics, most characteristic faults

Process Part

Removal of the unit from the machine

Disassembly of the unit into assembly units

Cleaning, washing of the most characteristic parts

Troubleshooting

Repairable part repair process

General Process

Calculation of costing time on an operation

Design Part

Occupational safety, fire safety and ecology 36 List of literature used

Introduction

1.1 Machine, its purpose and device

The basic model of the Kama Automobile Plant is the transport truck KamAZ5415 - this is a truck tractor. For the possibility of its operation along the entire road network, which allows a load on the axle of not more than 6 tons, its carrying capacity is limited to 12 tons, while the load on the rear trolley of the car does not exceed 15 tons. It can tow a trailer with a total mass of not more than 11.5 tons; base trailer of model GKB8350 with lifting capacity of 8000 kg.. Body is made in the form of platform with metal sides and base and metal frame for installation of tent.

KamAZ5320 can carry any cargo, from bulk construction cargo, to industrial cargo. It is widely used in agriculture in the transportation of feed, agricultural products, and many other useful materials. Having a large capacity often transports grain and sunflower seeds. It has high cross-country ability and reliability.

The car has: KamAZ740.10 engine, diesel, Vo6p. (90 °), 8cnl., 120x120 mm, 10.85 l, compression ratio 1 7, operating order 1-5-4-2-6-3-7-8, power 154 kW (210 hp) at 2600 rpm, torque 637 N-m (65 kgfm) at 15001800 rpm. Nozzles - closed type, TNDV - V-shaped 8-section, spool type, with low-pressure fuel pump, fuel injection advance clutch and all-mode speed controller. Air filter - dry, with replaceable cardboard filter element and clogging indicator. The engine is equipped with an electrophas device (EFU) and (by order) a pre-start heater PZHD30.

Transmission. The clutch is two-disc, with peripheral springs, the shutdown drive is hydraulic with a pneumatic amplifier. Gearbox - 5-speed, with a front divider, the total number of gears - ten forward and two back, gear ratios: I7.82 and 6.38; II4.03 and 3.29; III2.5 and 2.04; IV1.53 and 1.25; V1.0 and 0.815; ZH7.38 and 6.02. Synchronizers - on II, III, IV and V transmissions. Divider is equipped with synchronizer, control of divider - pneumatic-mechanical, pre-selector. Cardan gear - two cardan shafts. The main gear is double (conical and cylindrical), the gear ratio is 6.53 (by order - 7.22; 5,94; 5,43); middle axle - passing, with inter-axial differential locked by means of electro-pneumatic or pneumatic drive.

1.2 Technical capabilities and technical characteristics, most characteristic faults

The main failures of the driving bridges are:

- malfunction of the main gear is manifested by significant noise in the rear axle crankcase during car movement

- wear of end and cylindrical mounting surfaces of shafts, satellites, gears, differential cups, sleeves of bearings;

- wear or destruction of gears and splines;

- deformation of beam (casing of semi-axes);

- wear of mounting surfaces of trunnions.

1.4 Technical operation, PPM system, repair: types and purposes, methods and methods of performance

During the operation of the car, its working properties are gradually deteriorated due to wear of the parts, as well as corrosion and fatigue of the material from which they are made. Failures and faults appear in the car, which are eliminated during maintenance and repair. Repair is a set of operations to restore serviceability or operability of products and restore resources of products and their component parts.

The need and expediency of repairing cars are primarily due to the unequal strength of their component parts (assembly units and parts). It is known that it is impossible to create an equal-strength car, all parts of which would wear evenly and have the same service life. Therefore, during operation, cars undergo periodic maintenance and, if necessary, ongoing repairs (TR), which are carried out by replacing individual parts and units. This allows you to maintain cars in a technically serviceable state.

The current repair should ensure the guaranteed operability of the car during the mileage to the next scheduled repair, and this mileage should be at least the mileage to the next TO-2. In case of failures, an unscheduled TR is performed, in which parts and assembly units are replaced or restored in the volume determined by the technical condition of the car.

Overhaul should ensure serviceability and full (or close to complete) life of the car or unit by restoring and replacing any assembly units and parts, including basic ones.

During maintenance, it is allowed to perform separate types of maintenance (TO1, TO-2, STO), as well as their various combinations.

Repair in accordance with the purpose and nature of the performed works is divided into:

- associated repair - repair performed during maintenance;

- routine repairs (TR) performed in specialized areas, in repair areas of motor transport enterprises and maintenance stations;

- overhaul (CR) carried out at specialized repair enterprises.

The following units are sent for overhaul through KamAZ auto centers: engines; high pressure fuel pumps (HP fuel pumps), compressors, generators, starters, gearboxes, main transmissions of driving axles, steering mechanisms with hydraulic booster and pump.

List of literature

Kravchenko I.N., Gataullin R.M., Gladkov V.Yu. and other fundamentals for designing operational bases: A textbook on coursework and diploma design for university. -M: VTU Publishing House at the Federal Agency for Special Construction, 2005.182s.

Napolsky G.M. Technological design of motor transport enterprises and maintenance stations: Textbook for university. -M: Transport, 1985.231s.

Standard sets of technological equipment for zones and sections of ATP of various capacities. - M: Centravtotech Minavtotrans of the RSFSR, 1987.- 240s.

ONTP0191. Industry Standards for Technological Design of Road Transport Enterprises. -M.: Giproavtotrans, 1991.184s.

Regulation on maintenance and repair of road transport rolling stock. -M: Transport, 1986.73s.

Specialized process equipment: Catalogue, Rosavtospetsequipment software and additions. M.: CBNTI Minavtotransport of the RSFSR, 1986.165 p.

Table of technological equipment for ATP of various capacities, CAS and BTsTO.- M: TsBNTI Minavtotransport of the RSFSR, 1983.- 98 s.

Process equipment for car maintenance and repair: Handbook/R.A. Poprzhedzinsky and others: Transport, 1988.- 176s.