LMTV rear brake chambers

[gjswt19]

I have developed a leaking rear brake chamber and need to replace just the diaphragm. I have found only one post that lists the size being a type 9 for the service and a type 12 for the parking. I have called a few truck service centers and they don't carry those sizes. Also while looking there seem to be many different options for those sizes. I am not very familiar with the air brakes systems and the different diaphragms but if anybody has more info on them that would be great

 

[Oxyacetylene]

That was probably my post that you saw. Surely a truck parts place can order a diaphragm for you. The ones near me didn't have the size 9 in stock but they could all order it, so that's what I did. The generic replacements are just a diaphragm and do not have the plunger assembly glued to it. I pulled the plunger off the old one, scraped and cleaned the plunger, then used some kind of contact cement to put the plunger on the new diaphragm. So far mine is working fine that way, as best I can tell anyway. With more searching you may be able to find a direct replacement with the plunger assembly on it, but I'm sure it will also be more expensive. There are also part numbers available if you wanted to try purchasing a new whole brake chamber section. Post #2 from my thread has a link to the Haldex catalog where you can look at the wedge brake parts if you want to go that route and look for direct replacements: http://www.steelsoldiers.com/showthread.php?140345-Air-Brake-Info-and-Troubleshooting

 

[gjswt19]

Thanks for the reply, I just picked up the type 12 from fleetpride and am going to install today. Hopefully that will fix the leak

 

[Oxyacetylene]

Thanks for the reply, I just picked up the type 12 from fleetpride and am going to install today. Hopefully that will fix the leak

The size 12 is for the parking brake portion. If that is the one that's leaking, I would maybe replace the whole piggyback assembly rather than mess around with the spring in that portion of the chamber. The smaller size 9 is for the service brake and is what I replaced on mine.

 

[Reworked LMTV]

The size 12 is for the parking brake portion. If that is the one that's leaking, I would maybe replace the whole piggyback assembly rather than mess around with the spring in that portion of the chamber. The smaller size 9 is for the service brake and is what I replaced on mine.

How did this work?

 

[muddiver]

That was probably my post that you saw. Surely a truck parts place can order a diaphragm for you. The ones near me didn't have the size 9 in stock but they could all order it, so that's what I did. The generic replacements are just a diaphragm and do not have the plunger assembly glued to it. I pulled the plunger off the old one, scraped and cleaned the plunger, then used some kind of contact cement to put the plunger on the new diaphragm. So far mine is working fine that way, as best I can tell anyway. With more searching you may be able to find a direct replacement with the plunger assembly on it, but I'm sure it will also be more expensive. There are also part numbers available if you wanted to try purchasing a new whole brake chamber section. Post #2 from my thread has a link to the Haldex catalog where you can look at the wedge brake parts if you want to go that route and look for direct replacements: http://www.steelsoldiers.com/showthread.php?140345-Air-Brake-Info-and-Troubleshooting

On my truck the back right started leaking so I took it apart. Found the parking side with a broken spring.. Sent Fleetpride request for parts..

 

[Awesomlmtv]

I’m getting ready to replace all of the brake cans on my rear, does anyone have a reference to where I can buy these?

Much appreciated in advance. This forum has been an absolute life saver when working on these trucks.

 

[Mullaney]

I’m getting ready to replace all of the brake cans on my rear, does anyone have a reference to where I can buy these?

Much appreciated in advance. This forum has been an absolute life saver when working on these trucks.

.

BRAKE SYSTEM
Brake Caging Bolt	OREILLY	HD RB008 (Normal Stock	NAPA
Brake Caging Bolt Socket (3/4 wrench or this)	OREILLY	LIS 49000
Brake Chamber Dust Plug	TruckPro/EUCLID	E-9112	NAPA
Brake Screw Adjusting Screw	TruckPro/Meritor	A 2297L3158
Brake inverson valve	Napa/Haldex	RKN 28032
Rear spring brake chamber	Truckpro/Meritor/Haldex	X24-3276J-10	Haldex
Click here NOTE: Other Options for Rear Spring Brake Chamber
Front Spring Brake Chamber	Truckpro/Meritor	E4-3276P-16hi
Exhaust Brake	PACBRAKE	C20373	Iveco
Spring brake diaphragm	Truck pro / Napa	Type 12	Oreilly
Service brake diaphragm	Truck Pro / Napa	Type 9	Oreilly
Brake relay valve	napa haldex	N50004-D

 

[GeneralDisorder]

I’m getting ready to replace all of the brake cans on my rear, does anyone have a reference to where I can buy these?

Much appreciated in advance. This forum has been an absolute life saver when working on these trucks.

They are not all the same depending on year/revision and also aren't easy to find since these are wedge brakes and the commercial industry stopped using them 30+ years ago.

The rear's changed from type 10 to type 12 with the Bendix pedal change on the A1R. Different cans entirely. And there's quite a number of part numbers over the years.

AND besides all that they have like two moving parts and the diaphragms are like $6. So unless the junk is beyond rusted it's just too easy to rebuild them in 10 minutes and throw them back on.

 

[fuzzytoaster]

I’m getting ready to replace all of the brake cans on my rear, does anyone have a reference to where I can buy these?

Much appreciated in advance. This forum has been an absolute life saver when working on these trucks.

pa43-3276l12 are the current model of commercial brake cans being installed on FMTVs going for FMS.

 

[GeneralDisorder]

pa43-3276l12 are the current model of commercial brake cans being installed on FMTVs going for FMS.

The older trucks use a type 10. These would be for the A1R trucks with the Bendix pedal assembly.

 

[Awesomlmtv]

Mine broke when installing a hose replacement kit. Totally my fault for tightening down the adapter.

A0 and thank you all for the replies. This forum is such a valuable resourcei appreciate it.