TUBE AS 2852443 - Caterpillar

visual inspection of each suspension cylinder is the first step in the analysis of a problem. Make sure that the machine is on level ground. Do the inspection on an empty machine while the engine is stopped.Check each suspension cylinder for oil leaks around the seals and around the valves.Check each suspension cylinder for nitrogen leakage. It is difficult to detect leaking nitrogen. A solution that consists of soap and of water can be used to detect leaks. Make sure that there is no leakage around the valve cores and around the valve bodies. Make sure that the valve caps are in place. Make sure that the valve caps are tightened to 2 to 3 N m (18 to 27 lb in).Check for leakage at the O-rings that are located under the manifold and under the pressure sensor. Check for leakage at the O-rings that are located under the protective plates that are on the head. These protective plates cover some of the head bolts in order to prevent removal of the head while there is pressure in the suspension cylinder.Friction between the rod and the lower wear band may cause a dark stain to appear on the chrome of the suspension cylinder. This stain does not affect the wear life of the suspension cylinder. You can polish the chrome in order to remove this stain. Eventually, the wear band should become soaked by oil and by grease and the blackening should decrease.