AlexJet
Explorer
ARB CKMA12 High-Output compressor.
My ARB Compressor was used last time back in August 2010. Recently I needed to fill up a tire on friends vehicle. Compressor failed.
The motor was working, but was much louder and I felt vibration transferred to the frame of the vehicle. It wasn't pumping any air at all.
Quick on-site assessment came out with possible internal issue as outside everything looked fine. Chat over the eMail with ARB office in Seattle lead to the inspections of the cylinder. ARB Tech suggested that cap to be opened and visual inspection of the axle and piston be performed.
As per ARB recommendations, I removed the air filter assembly and air filter flange. The issue was simple at the first glance. The cap screw unscrewed. But further investigations lead to more dramatic findings.
As I can see the issue started with cap screw failure due to lost preload. Following vibrations lead to unscrewing the cap screw completely and starting of it's disintegration. This lead to the damage to air filter flange and motor flange due to loose parts in the lower cylinder. Disintegrating of the screw lead to extensive amount of metal chips in the cylinder and failure of piston bearing and damaged o-rings.
At result I found cap screw partially disintegrated, both motor and air assembly flanges extensive damage beyond repair, piston bearing need replacement (part is available only as piston assembly), o-rings need replacement due to metal contamination, cylinder requires cleaning out of metal chips a d further examination for damage from metal particles.
And everything started just from 1 screw loosing it's preload...
Series of pictures were made last night of damaged parts of the compressor and were sent to ARB USA. Will see what they will come up with.
My ARB Compressor was used last time back in August 2010. Recently I needed to fill up a tire on friends vehicle. Compressor failed.
The motor was working, but was much louder and I felt vibration transferred to the frame of the vehicle. It wasn't pumping any air at all.
Quick on-site assessment came out with possible internal issue as outside everything looked fine. Chat over the eMail with ARB office in Seattle lead to the inspections of the cylinder. ARB Tech suggested that cap to be opened and visual inspection of the axle and piston be performed.
As per ARB recommendations, I removed the air filter assembly and air filter flange. The issue was simple at the first glance. The cap screw unscrewed. But further investigations lead to more dramatic findings.
As I can see the issue started with cap screw failure due to lost preload. Following vibrations lead to unscrewing the cap screw completely and starting of it's disintegration. This lead to the damage to air filter flange and motor flange due to loose parts in the lower cylinder. Disintegrating of the screw lead to extensive amount of metal chips in the cylinder and failure of piston bearing and damaged o-rings.
At result I found cap screw partially disintegrated, both motor and air assembly flanges extensive damage beyond repair, piston bearing need replacement (part is available only as piston assembly), o-rings need replacement due to metal contamination, cylinder requires cleaning out of metal chips a d further examination for damage from metal particles.
And everything started just from 1 screw loosing it's preload...
Series of pictures were made last night of damaged parts of the compressor and were sent to ARB USA. Will see what they will come up with.
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