Help required: Wheel Cyl. boot part# interchange

[Mike K]

Originally Posted by John 4172

Hi Lynn
Ford truck 1939--48 and all blitzes use wheel cylander boots no. (p)5975 front and(P( 5976 rear PBR numbers. readily available in Aus.
PBR numbers and Lockheed numbers are often the same . PBR may use latter P , Lockheed use FC.

Hi John

PBR don't manufacture imperial sized cups any more . They sold all of the dies/moulds to a guy who apparently destroyed them or sold them off-shore. You may get lucky and find a store with some old imperial PBR stock, if you do, buy them all . My neighbour has had problems with the IBS imperial aftermarket cups made in Spain , leaking -weeping in a AT4 dodge truck , they are narrower cups than the PBR ones . We did think of using two of them in series eg 4 to each cylinder . Mike

[Jacques Reed]

Hi Mike,

Thanks for that information regarding thinner Spanish made IBS cups. It made me go check my spares box.

Luckily the rear ones were the correct thickness NOS ABS items but the front were the Spanish IBS as pictured.

Even without measuring, the IBS cup on the right is noticeably thinner than an earlier original sample on the left.
Measured as best as possible on a rubber part: 0.350" vs 0.315" = 0.035"

Not a lot, but enough to cause problems with sealing obviously.

Cheers,

[John Mackie]

Mike . It is a pity what's happered to the patrs of the Repco company.
I get all my brake hoses cylanders and cups from a firm at Orange N. S. W. They seem to have most items in stock

[Hanno Spoelstra]

Check the thread F15A wheel cylinder boots for a reference to an ATE part number.

HTH,
Hanno