Front and rear shock absorbers
1 - lower eye; 2 – compression valve body; 3 - compression valve disks; 4 - throttle disk of the compression valve; 5 - compression valve spring; 6 - clip of the compression valve; 7 - compression valve plate; 8 - return valve nut; 9 – recoil valve spring; 10 - shock absorber piston; 11 - recoil valve plate; 12 - recoil valve disks; 13 – piston ring; 14 - washer of the recoil valve nut; 15 - throttle disc of the recoil valve; 16 - bypass valve plate; 17 - bypass valve spring; 18 - restrictive plate; 19 - tank; 20 - stock; 21 - cylinder; 22 - casing; 23 - rod guide sleeve; 24 - sealing ring of the tank; 25 - holder of the stuffing box of the rod; 26 - stem gland; 27 - gasket of the protective ring of the rod; 28 - protective ring of the rod; 29 - reservoir nut; 30 - the upper eye of the shock absorber; 31 - nut for fastening the upper end of the front suspension shock absorber; 32 - spring washer; 33 - washer of the shock absorber mounting cushion; 34 - pillows; 35 - spacer sleeve; 36 – a casing of a shock-absorber of a forward suspension bracket; 37 - stock buffer; 38 - rubber-metal hinge
The shock absorbers of the front and rear suspensions differ in size, the method of fastening the upper part and the presence of a recoil buffer 37 at the front shock absorber, which limits the shock absorber travel during recoil. In addition, the front shock absorber has different performance parameters.
The rear shock absorber consists of a tank 19 with an eyelet, a compression valve (pos. 2, 3, 4, 5, 6, 7), working cylinder 21, rod 20 with piston 10 and recoil and bypass valves and casing 22 with an eyelet.
The tank 19 is made of a steel pipe, to the lower end of which an eye 1 is welded, and a thread for a nut 29 is cut in the upper part. The body 2 of the compression valve assembly with the valve disks is inserted into the groove of the eye. It is pressed against the groove by the working cylinder 21. The annular space between the tank and the cylinder is filled with liquid. Inside the working cylinder there is a rod 20 with a piston 10. The piston has vertical channels located along two circles. The channels on a small circle are closed from below by disks 12 and 15 of the recoil valve, and on a larger one - from above by a plate 16 of the bypass valve.
The compression valve is located at the bottom of the cylinder. In the valve body 2, a seat is made, to which the disks 3 and 4 are pressed by the spring 5 through the plate 7. The throttle disk 4 has a cutout through which the liquid is throttled at a low piston speed. In the lower part of the valve body there is a cylindrical groove and four vertical channels, and in the holder 7 there are six side and one central holes through which the liquid passes from the reservoir to the cylinder and back.
From above, a guide bushing 23 is installed in the cylinder, which is sealed in the tank with a ring 24, and the rod outlet is sealed with an oil seal 26 with a clip 25. All parts located in the upper part of the cylinder are pressed with a nut 29. Rubber-metal hinges 38 are pressed into the eyes of the shock absorbers.