DIY repair cs 100

In detail: do-it-yourself repair of cs 100 from a real master for the site my.housecope.com.

In the hydraulic drives of tractors, double-acting cylinders with a nominal pressure of 14.0 are used; 16.0 and 20.0 MPa of the following grades Ts-50-2; Ts-75; Ts-80-2; Ts-100-2; Ts-110-2; Ts-125-2 / 3 / (Figure 19).

Telescopic (hydraulic rams) cylinders are used on dump trucks. During the operation of agricultural machinery, in a number of cases, the hydraulic cylinder is not capable of developing the required force (N, kN), which does not allow the operation of lifting agricultural equipment or other type of work. A deviation from the norms and requirements should be considered as the spontaneous lowering of the tool, mounted machines, "lethargy" and slow movement of the stock, which leads to a violation of the agrotechnical requirements for soil cultivation, crop care, and a decrease in labor productivity.

1 - pin: 2 - cotter pin; 3 - the back cover of the cylinder; 4 - washer; 5, 10 and 22 - sealing rings; 6 - oil line washer; 7 - oil pipeline; 8 - rod assembly; 9 - cylinder body; 11 - front cover; 12 - cork; 13 - valve body assembly; 14 - valve sealing ring; 15 - valve assembly; 16 - scrapers cover; 17 - stop assembly; 18 - bolt; 19 - nut; 20- spring washer; 21 - guillemots; 23 - piston; 24 - piston sealing gasket; 25 - piston sealing ring; 26- nut assembly.

Figure 19. - Power cylinder.

Disassembly of the power cylinder includes the following basic operations. The top cover is detached. Next, the piston with the rod is removed. By disconnecting the piston from the rod, the rod and the top cover are disconnected. The deceleration valve is unscrewed from the top cover. Power cylinder malfunctions (table 6) most often occur due to improper assembly, wear and tear of its individual parts. During the operation of the power cylinders, the O-rings, the piston, the valve for limiting the piston stroke and its seat wear out the most. Cases of breakage of the movable stop, bending or breakage of the valve stem are observed. This occurs when an attempt is made to raise the implement with the stop touching the valve stem. At the same time, the valve is pushed out by the oil pressure and, resting against the stop, breaks it or bends the valve stem.

Video (click to play).

Table 6. - Typical failures of the power cylinder

In practice, there are cases when the tractor driver, when working with a mounted plow, sets the plowing depth not only with the help of the support wheel, but at the same time fixes the movable stop on the piston rod in a position corresponding to the set depth of soil cultivation. When plowing, the piston is in a floating position and the plow moves in a vertical plane, copying the topography of the field, and the piston rod moves with it. When the rod is pulled into the cylinder, the stop valve turns into a mechanical locking device and this leads to breakage of the movable stop, bending or breakage of the valve stem, or separation of the yoke from the lower cylinder cover.

Piston (Figure 21) wears out at the point of contact with the cylinder liner. At the same time, its outer diameter decreases and the seal of the liner deteriorates. When the piston is worn by more than 0.45 mm, it is rejected and a new one is made from the AL-10V aluminum alloy so that the clearance in conjunction with the cylinder corresponds to the data in Table 6.

Cylinder liner made of 40X steel, its inner surface is hardened by high-frequency currents. If there are scratches on the sleeve mirror, risks, it is polished until traces of wear are removed and the piston is adjusted to the size obtained, maintaining a normal gap in the mating.

V top cylinder cover the hole at the interface with the piston rod wears out.When worn to a gap in the mating of more than 0.5 mm, the top cover must be repaired. To do this, it is installed with a centering collar in the chuck of a lathe and the hole for the rod is bored to size D (Figure 20 and Table 7) grooves for the piston rod O-ring. Then, two bushings with an inner diameter of d are turned from bronzel, external D1 and length L1and L2. The bushings are pressed into the hole bored in the lid and the internal diameter is brought to the value D with a reamer.2. An O-ring of the piston rod is installed in the annular groove formed between the bushings.

In the top cover, the seat for the valve for limiting the piston stroke is also worn out. The tightness between the seat and the rubber sealing ring of the valve seat should be within 0.6 - 1.2 mm. If this tightness is lost, replace the O-ring and valve seat, choosing the largest parts within the manufacturing tolerances (table 8).

Sealing rubber rings replace with new ones when they lose elasticity. When replacing the rings, they must protrude above the surface of the centering collars of the cylinder covers by at least 0.25 mm.

1 - top cover; 2 - upper bushing: 3 - lower bushing.

Figure 20. - Assembly of the upper cylinder cover.

Table 7.- Repair dimensions of the upper cylinder cover parts, mm

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Image - DIY repair cs 100

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