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Hydraulics cylinder tips part 4

Author : Andrew Delaney of Parker Hannifin

12 February 2013

Seal replacement
In the face of continually increasing pressure to keep manufacturing costs low in the face of both stiff competition and challenging economic times, equipment operators may choose to replace individual components rather than the complete cylinder.

While kits of replacement gland seals are available, best practice would recommend the installation of complete glands with the seals pre-fitted. This approach helps minimise downtime, restores alignment where wear has occurred and significantly reduces the risk of damaging a seal while fitting; a particular issue in the case of more difficult to handle and delicate small diameter seals.

When seals are replaced, take a few minutes to examine the old seal and gland. If, for example, slight misalignment between the cylinder and machine member has caused the seals to fail prematurely, time spent correcting the alignment will pay dividends in terms of extended life and reduced maintenance.

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