Record working diagrams according to the instructions attached to the stand, after performing at least 5 working cycles, at the temperature of the working fluid of the shock absorber (20±5) °C, flywheel speed 60 min-1 and a stroke length of 80 mm for the front shock absorber and 100 mm for the rear.
Chart Curve (pic. 4-19) should be smooth, and at the transition points (from recoil to compression stroke) - no sections parallel to the zero line.
Evaluation of results according to the diagram
The resistance of the recoil and compression stroke is determined by the largest ordinates of the corresponding diagrams.
The highest point of the recoil travel curve at a scale of 1 mm = 47 N (4.8 kgf) should be located at a distance A from the zero line, equal to: 25-32 mm - for the front shock absorbers, 23.5-30.5 mm - for the rear.
The highest point of the compression stroke curve at the same scale should be at a distance B from the zero line, equal to 3.5-6.5 mm for the front shock absorbers, 4.5-7.5 for the rear.
The control values of the ordinates on the diagrams of the front and rear shock absorbers are set for cold shock absorbers at the temperature of the shock absorber (20±5) °C.
After checking, remove the shock absorber from the stand, if necessary, sort and replace damaged parts.
Repeat the test to make sure the shock absorber is working.