Notice the differences between the two bores of the wheel cylinder bodies.
The one on the left shows signs of wear and corrosion.
The pit marks will only cause the cylinder to leak and eventually fail.
The cylinder on the right has a stainless steel sleeve that provides a
permanent ideal surface for the rubber seals.
Q3) How does Power Brakes restore worn old corroded and oversize brake cylinders?
A) By precision boring the worn cylinder and pressing in a new non-corrosive stainless steel sleeve.
This sleeve resists the corrosive attack of the unstable nature of the brake fluid used in braking
systems today. It also provides a permanent ideal surface for the hard working rubber seals.
The cylinder bore is now better than new.
Another advantage is that when certain cylinders are very expensive or are no longer available
new, sleeving becomes an attractive alternative.
We also have a moral responsibility to conserve the world's precious resources by recycling,
rather than carelessly junking complex castings.
Q4) Does the trade recognise sleeved cylinders as an accepted repair procedure?
A) Yes it does. Hydraulic cylinders are currently being sleeved all over the world. Government
departments, that have the highest standards to maintain, are making use of stainless steel
cylinders. Since 1956, Power Brakes has successfully sleeved and remanufactured tens of
thousands of cylinders.