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#1
13-10-09, 01:49
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The master cylinder looks like the Ford CMP cylinder. If so, it is available as a modern production item from Mac's, Rock Auto and possibly others. If you can give the part number from the manuals this should be possible to confirm. I'm fairly sure that rebuild kits are available too, but check the condition of the bore before rebuilding. There's no point having great guts in a pitted bore.
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#2
13-10-09, 21:40
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bendix s230
thanks chaps im near belfast northern ireland
and uncanny enough my aka nickname is mac lol the bores great it was the aluminuim plunger brokke as we tried to take it apart it was well seased the brakes in the wheels are like new also just the washers and plunger shot would you be able to help me source the parts required many thanks david mccallion
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#3
14-10-09, 10:22
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M/cyl
Your master cylinder should be easy to fix, or get a replacement for. There is probably a casting number on it. Take it to a brake specialist, and they will help you. 1 1/4" bore is a common size. If the bore is ok, you will need a new piston of the correct length a spring, and a kit.
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Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions....
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#4
14-10-09, 23:51
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Helpppppppppppppp
tHANK GUYS BUT IVE SPENT ENDLESS HOURS SEARCHING MAKING PHONE CALLS BUT TO NO AVAIL
EVERY ONE IS TELLING ME IT WILL BE EASY TO SOURCE OR FIND A REBUILD KIT OR A REPLACEMENT AM I DOING SOMETHING WRONGGGGGGGGGGG SEE RESTORATION PAGE ON MY WEBSITE www.waryearsremembered.co.uk you will see the master brake cylinder it is a bendix s230 cast on side the broken plunger is a wagner usa part number fc1550 can someone please help as i was hoping to tow it in the remembrance parade in november cheers davey 
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#5
15-10-09, 02:36
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Master cylinder
Does this look like it?
1944 FORD 94T (1-1/2 TON) All Engines : Brake/Wheel Hub : Master Cylinder Price Core Total RAYBESTOS Part # MC4572 {Professional Grade; Bore Size=1 1/4" Number of Ports=1 Primary Outlet Size=1/2x20} Manual Brakes $65.79 $0.00 $65.79 From this site, http://www.rockauto.com/index.php?a=...FQjyDAod7loQjw Paul Last edited by Paul Singleton; 12-01-20 at 15:32.
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#6
15-10-09, 03:24
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Although they look similar, I would still like to see confirmation that the Polsten's master cylinder is the same as the Ford CMP master cylinder.
The CMP Ford part number is 91T-2140. According to www.MacsAutoParts.com this was used for 1939-1952 1 and 2 ton trucks. They sell a rebuild kit for the same applications as part 91T-2004-A. The prices are for the master cylinder $69.95 and for the kit $32.00. (Rock Auto lists a rebuild kit for $16.50 for the 1940 Ford 91T truck 1-1/4 inch master cylinder) The same master cylinder was used on the 2 wheeled CMP 15 and 20 cwt trailers (GS, pole, gas welding etc.)and the 4 wheel trailers for Brake Drum Grinder, 60 ton press, QMG-MT as well as GS. All in all, it seems a common master cylinder, it looks similar, but before I suggest anyone to go out and buy a kit for anything as critical as brakes I would like to see confirmation that the Polsten manual lists the master cylinder as having part number 91T-2140. If you want to buy a kit on spec, I can't stop you. But if you do, please measure all the parts very carefully to be sure they match what you need. I don't know the weight of the Polsten setup but I'm sure its enough to be a menace if it gets away from you
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#7
15-10-09, 23:22
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Quote:
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#8
15-10-09, 23:39
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True true Grant thank you
its around 6893lb 3.12tonne metric i wouldnt want to have brake failure when its be hind the morris gun tractor  the brakes are the best they can be but with modern day drivers the way they are  the polsten carriage manual ive checked states it is a bendix s228 part number or cat number csp125/1 don know if this cross references any the part numbers used by ford or cmp i just wanted to say thanks again lads i hope to resolve it with your good help cheers davey
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