TERM RING

TERM RING 5535 5159 00 is essentially a guide, keeping things centered inside a cylinder or a rotary joint. Think of it like a spacer that prevents metal-on-metal contact between a moving part, say a piston, and the cylinder wall itself. It’s not a primary seal, but it's critical for maintaining the right clearances. This helps the main seals do their job properly and stops the piston from rubbing and scoring the bore, which would be a real headache to fix later on.

When one of these starts to wear out, you’ll usually notice a few things. First off, the piston or rod might start to drift a bit more than it should, not holding its position as firmly. You could also get increased friction, which means the cylinder might feel sluggish or even heat up more than normal during operation. What often happens is that the worn ring allows the piston to wobble, and that puts extra stress on your rod and piston seals, causing them to fail prematurely. So, if you're replacing seals more often than you think you should, take a good look at these rings.

Replacing these isn't usually a huge job, but it's one of those 'while you're in there' items. Always make sure you properly clean out the groove where the new ring sits. A common mistake is not checking the cylinder bore for any scoring or damage that might have happened because the old ring was worn down. If the bore's rough, that new ring won't last long, and you'll be back in there sooner than you want. Also, give a quick once-over to the adjacent seals; sometimes they get nicked during removal or installation if you're not careful.