[TR] FW: Recall of Brake Master Cylinders

Carl TR cfmtr3a at verizon.net
Sun Aug 21 15:55:27 MDT 2011


FYI - Just In case



Notification of A Voluntary Recall of Brake Master Cylinders

This voluntary recall applies ONLY to the brake master cylinders listed
below:


Item

Description & Application


180-791

Brake Master Cylinder for Nash Metropolitan
Clutch Master Cylinder for MGA Twin Cam and MGA MK II Deluxe


513-319

Brake Master Cylinder for Austin Healey BN7, BT7, BJ7 (Cars without a brake
servo)
Clutch Master Cylinder for Austin Healey BN4 from CE 48863, BN6, BN7, BT7,
BJ7, BJ8 without a brake servo


581-101

Austin Healey 3000s (BN7, BT7, BJ7, BJ8) with power brakes.


581-011

Triumph TR3 from TS13046 through TR 3B


581-032

Triumph TR4 from CT5784 on and TR4A. (Girling brake system)


581-512

Brake Master Cylinder on Austin Healey BN4 to CE 48862.
Clutch Master Cylinder on Triumph TR4-4A.

The Moss Technical Services department has determined that between
approximately March 1, 2010 and February 1, 2011, we received, and sold
brake master cylinders from a single manufacturer under the brand name
Classic Gold (with one exception) with an internal design element that may
fail in use. Specifically at issue is the foot valve. Although no one had
reported a foot valve failure in an installed master cylinder, it had been
suggested that because the foot valve design differed from an original
Girling design, it was suspect. There are many different foot valve designs,
so the difference in appearance or design is not, in and of itself, a cause
for concern. However, the manufacturer of the master cylinder did not have
test data on this particular valve. We suspended sales and arranged for the
brake master cylinders to be tested according to SAE standards by an
independent automotive testing laboratory to determine if there was a risk
of foot valve failure in use.

Foot valve failures were experienced during the extreme pressure test at
3,000 psi and after 10,000 cycles at 248: F during a heat durability test.
The pressures and temperatures used in the tests far exceed the pressure and
temperatures you would experience with the master cylinder installed in a
car, but the failure of a foot valve is serious because it closes off the
port to the brake fluid reservoir when you step on the brake pedal. If the
foot valve fails to close, the pedal will go to the floor without putting
any pressure on the brake shoes or pads. In other words,

Your brakes could fail, with the potential for serious injury.

Moss is therefore voluntarily recalling the brake master cylinders listed
above because they share this particular foot valve design.

Sincerely,

Michael Grant
Product Manager, Moss Motors Ltd.



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