How to set this washer to the brack piston

[Sandun]

Hi can u tell me how to do this- difficult to enter it to piston washer size and Master pump size is ok - has it any tool ?[frame][/frame]

[les]

You need to ease it over a bit at a time, it will stretch, lubricate it with some brake fluid and get it the correct way round and on the correct end. The rubber seal looks in bad condition in the photo, you should have a new one. In fact if it's from the master cylinder It would be wiser to buy the complete cylinder new, for safety.

[bmcecosse]

I agree - it appears ruined to me ! Have you been using engine oil in the brake master cylinder ????

[Sandun]

No i use brack oil Dot 3 - look at the washer when i remove masterpump the washer bended and lose like this - then i going to put it new washer - i put it 8 months ago - i dont know what happend it - i remember i use rubber greas when it fit to the piston and pump- greas use when change washer kit or not ?