Clean­ing bear­ings

Classic Motorcycle Mechanics - - WORKSHOP -

There’s ac­tu­ally no jus­ti­fied rea­son for chang­ing bear­ings if there’s noth­ing wrong with them. The fact that many own­ers sim­ply knock out the old ones and fit re­place­ments shows just how cheap new ones are. You can clean bear­ings in situ but it’s messy and frankly a bit awk­ward. Whether you opt to re­move the bear­ings or not here’s the SP: if the balls and races are pro­tected by a metal shield then this can nor­mally be care­fully prised out. Some plas­tic shields can also be win­kled out but take ex­tra care here. Wipe away as much of the old grease and dirt as pos­si­ble with a lint free rag; then wash out the old grease with white spirit or sim­i­lar. When all of the old grease has been evicted, wash the bear­ing with fresh clean sol­vent then re­move this with brake cleaner and al­low the bear­ing to dry. You can spin a dry bear­ing briefly and care­fully but don’t overdo it. Notch­i­ness, re­sis­tance or rum­bling? Re­place the bear­ing. Vis­i­ble rust? Ditto. All be­ing well then the bear­ing can re­placed, with a ball race spe­cific bear­ing grease. Cleaned and greased bear­ings can last for ages but are of­ten eas­ier and cheaper to re­place.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.