Topic: Brake Piston Removal Grease Gun Method

[zalion0]

Figured i'd post this as it may help someone in the future. I have a '77 CB750 F2 and like many, needed to remove the brake pistons from the callipers. I had no access to an airgun or a working master cylinder to pump the piston out. In the end, I used a 'Hilka Pro-Craft Manual Grease Gun Set 6 Pieces' which came with all the attachments I needed, so no need for extra purchases. It also included a 3oz grease cartridge which was enough grease to move all pistons. It was also fairly cheap at £17.

https://www.screwfix.com/p/hilka-pro-craft-manual-grease-gun-set-6-pieces/4744r

[fizzlebottom]

I used this method years ago when I rebuilt the calipers on my 650. Worked like a charm. The only problem is that you then have to clean up all of the nasty grease you shoved inside the caliper.

[Stev-o]

The only problem is that you then have to clean up all of the nasty grease you shoved inside the caliper.

+1...last time I did in my garage, the grease hit my fan that was sitting next to my workbench...talk about #$%*e hitting the fan!!!

I find using compressed air more exciting!

[krusty]

I used this method years ago when I rebuilt the calipers on my 650. Worked like a charm. The only problem is that you then have to clean up all of the nasty grease you shoved inside the caliper.

I too have used this method many times. I had a Suzuki rear brake slave cylinder with seized pistons. The wheel and hub it was in had lain outside in the weather and dirt for many years behind a dealer shop. For months I tried all the coventional methods - air pressure, soaking in various concoctions, heat. etc. It wasn't 'till I discovered the grease gun method that I finally got the pistons out. Easy-peasy. Cleaning out the grease is a two minute job in my shop kero parts washer.

[Don R]

 I've used the grease gun on a caliper and a master cylinder this week as well as using a master cylinder that needed flushed to pump the piston out of another caliper. A putty knife, a few paper towels and it's cleaned up.