Brake Doctor with Booster

We carry a range of new replacement brake boosters.
If a replacement booster is not available, just post or courier yours to us for a full restoration.

You can phone us on
(08) 8261 0888
or you can email us anytime at:

You can send your booster to us using Australia Post or any convenient courier service.
Most delivery companies operate a tracking service that follows delivery of your booster.
"Remember...Australia Post delivers parcels up to
For your convenience, here is a handy link to a ready made label for your parcel:

Sample Booster #2Sample Booster #3Sample Booster #4


Q) Are the Brake Doctors familiar with all boosters?
A) Yes we are. This includes Mastervacs, Hydrovacs, Treadlevacs and remote boosters. We've
     been in the brake business since 1956 and we have seen them all.
     Here's a list of the makes you may find:
     Aisin; ATE; Bendix; Clayton Dewandre; Delco; Girling; Girlock; JKC; Knorr; Lockheed; Midlands
     and PBR just to name a few.

Q) Can brake booster bodies be sleeved?
A) If needed corroded brake booster bodies can be restored to better than new by sleeving.

Q) Are all boosters repairable?
A) We can restore most boosters, even some sealed units that come crimped together and which
     were never intended to be serviced.
     We keep a
comprehensive range of brake booster parts that are sourced worldwide to ensure the
     overhauling of as many boosters as possible. This includes boosters for American vehicles such
     as Cadillac's, GM's, Mustangs and Galaxies; English vehicles including Jaguar, Aston Martin
Bristol; and European vehicles like BMW, Alfa Romeo and Mercedes.

Q) Are all boosters tested after restoration?
A) Yes they are all tested on a dedicated test rig for output, vacuum and hydraulic performance.

Q) What is the likely cost of restoration?
A) Age and condition of model influence cost. A quick phone call to us on
    (08) 82610888
will help answer that one.

Q) Can you suppy repair kits so I can overhaul my own booster?
A) In most cases we can, but for everybody's safety we prefer not to.

Q) Why is that?
A) The four main reasons are:
     1) Some boosters or power brakes were designed as a sealed unit, never to come apart.
         Special tools and equipment are needed to dismantle them.
     2) New seals will fail prematurely if fitted to corroded or scored slave and control cylinders in
         need of sleeving.
     3) Kits only cover major components. You may not recognise other critical worn, damaged or
         missing parts.
     4) Your best efforts may be in vain if you can't test the unit for vacuum and hydraulic leaks, and
         overall performance, before refitting to your vehicle.
     For these reasons, we suggest you send your unit to us for a professional tested outcome.

Q) I'm not sure if my booster is working properly. How can I test it?
A) Here's a simple test. With the motor not running, pump the brake pedal 5 times, then apply the
     brakes as normal holding your foot on the pedal. Now start the engine. If the booster is working
     properly, the brake pedal will sink a little as the booster applies extra pressure. Now turn the
     engine off. Your brake pedal should stay down. If your pedal slowly comes back, you have a

Q) What are the most common faults with brake boosters?
A) Fault 1...Ruptured Diaphragms. Result...Engine will idle faster and may stop when applying the

     Fault 2...Seal failure causing an internal fluid leak. Result...Fluid will be sucked out of the booster
     and into the motor and will burn and cause eventual brake failure once the master cylinder is
     empty of brake fluid.

     Fault 3...Reduction, or loss, of vacuum supply. Result...Hard pedal and poor braking. All modern
     car boosters utilise vacuum generated by the suction of the pistons or by a vacuum pump. This
     creates a partial vacuum inside the booster. Applying the brakes admits air at atmospheric
     (higher) pressure to one chamber of the booster. The resultant pressure imbalance

     actuates the booster. Therefore a good vacuum supply is vital.
     To test, remove the vacuum hose from the booster and start the engine. A vacuum gauge should
     read 20Hg on the overrun. Just putting a finger over the hose end is not conclusive.
     Depending on age and condition, the hose may be heat and fuel affected and could collapse
     when the air gets sucked out of it. If you have any doubts, replace the vacuum hose and examine
     the external check valve. You should be able to suck air in through the valve, but not out.

     Power Brakes facilities and collective experience are available to identify and correct all these

Q) Do you offer a guarantee on Power Brakes products and brake boosters?
A) Yes we do...just click on the "Your Guarantee" button for details.

Booster being tested on the test bench.
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