Strong impacts of the body against the axle beams when driving a loaded car, difficult traffic control indicate external manifestations of wear or breakage of the rear or front suspension spring. To avoid this, it is necessary to periodically check the springs, but how can this be done?
Instructions
Step 1
All springs, depending on the length and on the load of 3425 N (350 kgf), are divided into two classes: class "A", the length of which is more than 278 mm and class "B", the length of which is less than or equal to 278 mm. At the same time, the "B" class springs on the outer side of the coils are painted over with black paint, and the "A" class springs are not painted over at all.
Step 2
Before starting the inspection, all parts must be thoroughly rinsed. Do not forget to protect bushings, protective covers and rubber parts from solvents. Then inspect every spring part for cracks, mechanical damage and wear.
Step 3
It is necessary to check the length of each spring of the rear or front suspension in a free state, if the length of the spring is less than the maximum permissible standard value, then it should be replaced. Remember that the standard is 44.00 mm, the spring length under a load of 216 N is approximately 35.00 mm, and the length of the spring under a load of 451 N is 27.20 mm.
Step 4
Now check the elastic characteristics of the spring itself by its control points, before that, preliminarily clamping it until the coils touch each other. Then look if there is any deformation of the spring of the rear or front suspension, if there is one, this means that there are reasons for its malfunction, therefore it is necessary to replace the spring.
Step 5
Next, you should check the spring for perpendicularity. If the non-perpendicularity is greater than the maximum permissible standard value of 1.5 ° or less, then this means that the spring has broken its properties and should be replaced.
Step 6
There is another old way of checking springs. To do this, between two metal strips with a bolt in the middle, clamp the old and new springs and gradually tighten the bolt nut. If they are compressed to the same extent, then the old spring is in normal condition.
Step 7
And finally, it is necessary to check the condition of the rubber support pads of the rear or front suspension springs. In case of malfunction, replace them with new ones.
