Mercedes-Benz Sprinter have been presented in the beginning of 1995. It the lorry from 2,6 to 4,6 т is created by a fully loaded mass for versatile use in various spheres . Mercedes Sprinter the chassis with onboard or самосвальной a platform, with a high and standard roof, with a dual cabin and three variants of a wheelbase can be delivered as a microbus or a van, and also as the chassis: 3000, 3550 and 4025 mm. Along with Vito, Sprinter two years named "a microbus of year" on end. This Mercedes is capacious enough: the useful volume of closed van Sprinter makes from 7 m. a cube (short base, a usual roof) to 13,40 m. a cube (long base, a high roof). With long base it is possible to load Into a variant easily 4-metre boards or 4 europans. Thanking сдвижной a lateral door or through completely swinging open rear doors loading by a loader is made conveniently enough. In variants with an onboard platform or a tipping body load-carrying capacity of the car makes from 750 kg (a fully loaded mass 2,59) to 3715 kg (6-tonnik), for transportation of a brigade to 7 persons it is possible to order "Sprinter" with a double-row cabin. By transportation passengers in комби or a passenger microbus besides the driver conveniently take places to 9 persons. One of essential advantages of model Sprinter are economic engines - four new diesel CDI and one advanced petrol, which capacity from 60 kw (82 h.p.) to 115 kw (156 h.p.) . Cars Sprinter develop the maximum capacity in a range from 1400-1600 rpm to 2400-2600 rpm. The automated mechanical gear box established to order with function of transition to a manual mode allows to use a high twisting moment optimum. Fuel consumption is lowered on 3-5 % in comparison with previous engines with direct injection. To order it is possible to establish system of automatic start-up/engine cutoff which in 3 seconds after a car stop switches off the engine that will allow to save even on traffic lights, thus, fuel consumption is reduced to 2-8 %. The resource of run and, as consequence, durability of motors has simultaneously increased.At will of customer Sprinter can be equipped by the active service system Assyst regulating intervals of change of oil depending on actual operational loading of the car. The firm offers a wide spectrum of spare parts to Mercedes-Benz Sprinter. Engine repair - labour-consuming operation, demands an expense of time and new spare parts. Mercedes Spare Parts tells about separate stages of repair. Today on page Mercedes Spare Parts - assembly of buckets and connecting rods after repair. Buckets perceive pressure of combustible fuel and transfer it through connecting rods to an engine bent shaft. Among МСС the special buckets having a star-shaped combustion chamber are applied. The basic components of the bucket are the piston head, a zone of rings with piston rings, a skirt and lugs for a piston finger. Piston fingers are fixed by retaining rings in lugs of buckets. Two top piston rings (ring gaskets) interfere with a blowby from a zone of combustion of fuel in an engine crankcase. Bottom (oil-control ring) removes surpluses of oil from walls of cylinders and dumps them in an engine crankcase. Connecting rods connect buckets to an engine bent shaft. The basic components of a connecting rod are the top crosshead (covers a piston finger), the connecting rod rod, the bottom releasable crosshead together a cover (covers a bent shaft rod journal)Assembly of buckets and connecting rods
Fig. 1. Mercedes spare parts bucket and connecting rod after dismantling: 1 - piston rings; 2 - retaining rings of piston finger; 3 - bucket; 4 - piston finger; 5 - connecting rod; 6 - bearing barrel in top crosshead; 7 - bolts of fastening of a cover connecting rod bearing; 8 - top liner connecting rod bearing; 9 - bottom liner connecting rod bearing; 10 - cover connecting rod bearing
On fig. 1 are shown Mercedes spare parts bucket with connecting rod. At their assembly and installation it is necessary to execute following operations:
- To pick up necessary Mercedes spare parts;
- Before assembly attentively to inspect surfaces of buckets (in the event that new buckets are established). To check up diameters, dimensional groups and two last figures on a parts book which should be designated on buckets and correspond to adjusting requirements;
- At replacement of connecting rods to pay attention to heels of covers of bearings where there can be centre mark one or two dot labels which define dimensional group of liners of bearings;
Fig. 2. The bucket with a connecting rod in gathering
- To grease piston finger and to press it in bores of lugs of the bucket and the barrel of a connecting rod approaching on diameter nozzle . To establish from both parties retaining rings of a piston finger, having convinced, that they have well sat down in the flutes. To establish the bucket with a connecting rod in the engine follows so that the arrow 1 (2) on a piston head specified fig. on a front part of the engine, and guiding petals of 2 liners connecting rod bearings have been located on the left side of the engine;
- To be convinced that after assembly the bucket freely turns in both parties on piston finger;
Fig. 3. Piston rings in sectional view: 1 - compound oil-control ring with dilator ( work face is chromeplated); 2 - bottom compressionring with section in the form of trapeze; 3 - top compression ring of square section ( contact area asymmetrically to grind also is chromeplated)
- By means of nippers for piston rings to establish rings on the bucket, paying special attention on correct sequence of their installation. Compression rings can be mixed easily places, therefore pay attention to their sections and an arrangement on the bucket. On fig. 3 sections of rings and an order of their arrangement are shown.
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