04-09-2019, 07:52 PM
Assuming seals are replaceable warming might help, but I'd drain any fluid before using a flame as it's highly inflammable. I should have thought if you can get the units apart in one piece then a gentle clean-up with very fine emery and a new set of seals would get you going (or rather stopping) again. I'm not sure how much pressure you could generate with a grease gun but the hydraulic system itself ought to be able to generate a fair bit. For goodness sake if you use grease or any other process that involves mineral oils make sure every trace of it is removed before refilling with brake fluid.