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all makes heavy-dutyspring brakes & chambersAlliance Truck Parts has over 30 product lines to serve the commercial transportationindustry with reliable new and remanufactured all-makes parts and accessories neededmost to keep trucks and buses on the road. All Alliance truck parts meet or exceed OESspecifications for quality, fit and finish, and are backed by a nationwide warranty — whichmeans drivers don’t have to trade quality for value.all makes heavy-dutyspringbrakes &chambersIllustrations and photographs used in this catalog may vary slightly from the actual product.Prototype samples are sometimes used for photography. The production parts may vary slightly.Availability of products shown in this catalog is subject to change without notice.

PARTS NUMBERING SYSTEMWARRANTYparts numbering systemThe Alliance Truck Parts numbering system is set up systematically:Example – ABP N42A 23030CD.warrantyAlliance truck parts are backed by a 1-year/unlimited-mile standard warranty.parts numbering systemAll parts numbers in this program contain the prefix ABP and N00 (the companyassigned code for this program). The number following the N refers to the part segmentand is different for each. The last six digits are assigned based on part and design.All parts in the catalog are set up with an Alliance Truck Parts number. In the back ofthis catalog you will find an extensive cross reference list. This will help link anothermanufacturer’s part to an Alliance ABP number.Alliance Truck Parts Numbering System Example:ABP N42A 23030CDAlliancePrefixN=New42A=Brake PartFirst Digit: Packaging/Clevis1 or 2: With Clevis3 or 4: Without ClevisNext 2-4 Digits: Chamber Size2 Digit #: Service Chamber Type4 Digit #: Spring Brake Chamber TypeWARRANTYAlphabeticalSuffix:CD: Complete UnitC3D: Complete Unit – Long StrokePD: PiggybackPBKD: Piggyback KitPBK3D: Piggyback Kit – Long Stroke(Eg: ABP N42A 23030CD)

NOTESTABLE OF CONTENTSspring BRAKEs, CHAMBERS &componentsPAGE 21features & benefits....................................................................................................................... 3SPRING BRAKES..................................................................................................................................... 4PIGGYBACK & KITS................................................................................................................................ 5SERVICE CHAMBERS............................................................................................................................ 6COMPONENTS......................................................................................................................................... 723maintenancemaintenance ...................................................................................................................................... 9CROSS REFERENCEPAGE 8PAGE 10cross reference ............................................................................................................................. 11Table of Contents

spring brakes, chambers & componentsspring brakes, chambers & componentsfeatures & benefitsspring brake SPECIFICATIONS1spring brakes, chambers & componentsAlliance brake chambers are designed to provide years of safe, dependable operationfor service, parking or emergency braking applications. These spring brakes and servicechambers feature rugged construction, heavy-gauge housings and steel components toreduce corrosion and potential equipment failure.– Treated and coated for corrosion protection, dramatically extending life– Guided spring pressure plate prevents side forces which cause diaphragm sidewall andseal wear– Special crimping method ensures a no-guess diaphragm seal and allows for a low profilewithout clamp interference– Steel internal rod and slotted center seal design improves alignment of moving partsand prevents premature seal wear– Synthetic blended rubber diaphragms for superior resistance against abrasion andfatigue crackingService & EmergencyService &PortEmergencyHolesPort Holes3/8-18 NPTF3/8-18 NPTFReleaseRelease BoltBolt StorageStorageParking ServiceParking Service1.501.505/8-11 2A5/8-11 2A5/8-18 2A5/8-18 2APART NO. SIZE STROKE CLEVISABP N42A 12024CD 2024 2.5” ThreadedABP N42A 42024CD 2024 2.5” NoABP N42A 12424CD 2424 2.5” ThreadedABP N42A 42424CD 2424 2.5” NoABP N42A 12430CD 2430 2.5” ThreadedABP N42A 32430CD 2430 2.5” ThreadedABP N42A 42430CD 2430 2.5” NoABP N42A 13030CD 3030 2.5” ThreadedABP N42A 23030CD 3030 2.5” ThreadedABP N42A 33030CD 3030 2.5” NoABP N42A 43030CD 3030 2.5” NoABP N42A 3LR3030CD 3030 2.5” NoABP N42A 13030C3D 3030 3” ThreadedABP N42A 23030C3D 3030 3” ThreadedABP N42A 33030C3D 3030 3” NoABP N42A 43030C3D 3030 3” NoABP N42A W3030CD 3030 3” WeldedABP N42A 13036CD 3036 2.5” ThreadedABP N42A 43036CD 3036 2.5” NoABP N42A 13636CD 3636 3” ThreadedABP N42A 43636CD 3636 3” No4.75 4.751SPRING BRAKES, CHAMBERS & COMPONENTS55 34

spring brakes, chambers & componentsspring brakes, chambers & componentspiggyback & kits SPECIFICATIONSservice chamber SPECIFICATIONS1Piggyback kit includes:Piggyback, Diaphragm,Clamp assemblyPort Holes Port Holes3/8-18 3/8-18 NPTF NPTFType Type 12 & 12 16 & 161/4” NPTF 1/4” NPTF1.565/.555 .565/.555spring brakes, chambers & componentsPiggyback KitsPART NO. SIZE STROKE CLEVISABP N42A 24PBKD 2424 2.5” N/AABP N42A 30PBKD 3030 2.5” N/AABP N42A 230PBKD 3030 2.5” N/AABP N42A 30PBK3D 3030 3” N/APiggybackPART NO. SIZE STROKE CLEVISABP N42A 12430PD 2430 2.5” N/AABP N42A 13030PD 3030 2.5” N/AABP N42A 23030PD 3030 2.5” N/AABP N42A 13036PD 3036 2.5” N/A.50 .501.50 1.50(1.10 (1.10 for Type for Type 12 & 12 16) & 16)PART NO. SIZE STROKE CLEVISABP N42A 12SCD 12 1.75” ThreadedABP N42A 12SCND 12 1.75” NoABP N42A 16SCD 16 2.25” ThreadedABP N42A 16SCND 16 2.25” NoABP N42A 20SCD 20 2.5” ThreadedABP N42A 20SCND 20 2.5” NoABP N42A 24SCD 24 2.5” ThreadedABP N42A 24SC3D 24 3” ThreadedABP N42A 24SC3ND 24 3” NoABP N42A 30SCD 30 2.5” ThreadedABP N42A 30SCBND 30 2.5” NoABP N42A 30SCND 30 2.5” NoABP N42A 30SC3D 30 3” ThreadedABP N42A 30SC3ND 30 3” NoSPRING BRAKES, CHAMBERS & COMPONENTS56 #

spring brakes, chambers & componentscomponent SPECIFICATIONS1MAINTENANCE2spring brakes, chambers & componentsPART NO.DESCRIPTIONABP N42A D12000D Diaphragm - T12 - 1.75” StrokeABP N42A D16000D Diaphragm - T16 - 2.25” StrokeABP N42A D20000D Diaphragm - T20 - 2.25” StrokeABP N42A D24000D Diaphragm - T24 - 2.25” StrokeABP N42A D24002D Diaphragm - T24 - 2.5” StrokeABP N42A D30000D Diaphragm - T30 - 2.5” StrokeABP N42A D30003D Diaphragm - T30 - 3” StrokeABP N42A 30013AD Service Pushrod - T30 - StdABP N42A 10025A Release Tool AssemblyABP N42A 30016AD Non Pressure Housing T30ABP N42A 10026BD Clevis Assembly Thread = 5/8”. Pin = 5/8”ABP N42A 10026AD Clevis Assembly Thread = 5/8”. Pin = 1/2”ABP N42A 30020AD Clamp Assembly - T30ABP N42A 24021AD T24 Service Chamber Pressure Housing78

maintenancemaintenance2Because no two vehicles operate under identicalconditions, maintenance intervals will vary.Experience is a valuable guide in determining thebest maintenance interval for a vehicle.WARNING!Spring Brake Chambers and Piggyback Spring Brakechambers contain a loaded compression spring.Property damage, serious injury or death may occurif instructions are not followed completely.CROSS REFERENCE3maintenanceEvery 300 operating hours, 8,000 miles, orone (1) month:1. Check push rod travel and adjust travel at theslack adjuster if needed. Push rod travel should beas short as possible without the brakes dragging.Excessive push rod travel reduces brakingefficiency, shortens diaphragm life, gives slowbraking response and wastes air.2. Check push rod to slack adjuster alignment fromrelease to full stroke position to be sure the pushrod moves out and returns properly withoutbinding at the non-pressure plate hole or withother structures. Also check the angle formed bythe slack adjuster arm and push rod. It should begreater than 90 degrees when the chamber is inthe released position and approach 90 degrees atmaximum readjustment stroke.3. Check tightness of mounting nuts. Torque on thenonpressure plate mounting nuts should be 110ft./lbs.4. Check cotter pins to ensure they are in place.5. Check all hoses and lines. They should be secureand in good condition with sufficient length toallow for axle movement.Every 3,600 operating hours, 100,000 miles orone (1) year:1. Disassemble and clean all parts. Clean all metalparts in cleaning solvent, removing all rust andscale. Carefully inspect all metal parts for cracks,distortion or damage. All diaphragm sealingsurfaces should be smooth and clean.2. Install new diaphragm or any other parts if theyare worn or deteriorated. When the diaphragm,spring, or both are replaced, they should bereplaced in the corresponding chamber on thesame axle.910

CROSS REFERENCECROSS REFERENCEBENDIXMGMPROLINETSEP/NAlliance P/NCOMP. P/NAlliance P/NCOMP. P/NAlliance P/NCOMP. P/NAlliance P/N3NT3030STD-78 ABP N42A 33030CD /ABP N42A 43030CDNT3030ELS-80 ABP N42A 33030C3D /ABP N42A 43030C3DNT3030STD-KIT ABP N42A 30PBKD1412001 ABP N42A 12SCND1416001 ABP N42A 16SCND1421001 ABP N42A 20SCND1427001 ABP N42A 24SCDPLBSC-12PLBSC-16PLBSC-20LSPLBSC-24ABP N42A 12SCNDABP N42A 16SCNDABP N42A 20SCNDABP N42A 24SCD12SCN016SCN120SCN224SCN2ABP N42A 12SCNDABP N42A 16SCNDABP N42A 20SCNDABP N42A 24SCD3cross referenceNT3030ELS-KITCOMP. P/NSC12SC16SC20LSC24LSC24XLSC30SC30LGC2424LABP N42A 30PBK3DHALDEXAlliance P/NABP N42A 12SCNDABP N42A 16SCNDABP N42A 20SCNDABP N42A 24SCDABP N42A 24SC3NDABP N42A 30SCNDABP N42A 30SC3NDABP N42A 42424CD1428001 ABP N42A 24SC3ND1430001 ABP N42A 30SCND1431001 ABP N42A 30SC3ND3427051 ABP N42A 42424CD3429051 ABP N42A 42430CD3230051 ABP N42A 33030C3D /ABP N42A 43030C3D3230008 ABP N42A 30PBK3D3230951 ABP N42A W3030CD3430551 ABP N42A 3LR3030CD3430051 ABP N42A 33030CD /ABP N42A 43030CD3430008 ABP N42A 30PBKDPLBSC-24LSPLBSC-30PLBSC-30LSPLBTS-2424PLBTS-2430ABP N42A 24SC3NDABP N42A 30SCNDABP N42A 30SC3NDABP N42A 42424CDABP N42A 42430CDPLBTS-3030LS ABP N42A 33030C3D /ABP N42A 43030C3DPLBPS-3030KLS ABP N42A 30PBK3DPL3030LS-WCRPLBTS-3030XABP N42A W3030CDABP N42A 3LR3030CDPLBTS-3030 ABP N42A 33030CD /ABP N42A 43030CDPLBPS-3030K ABP N42A 30PBKD24SCN330SCN230SCN32424TN22430TN2ABP N42A 24SC3NDABP N42A 30SCNDABP N42A 30SC3NDABP N42A 42424CDABP N42A 42430CD3030TN3 ABP N42A 33030C3D /ABP N42A 43030C3D3030SN3K ABP N42A 30PBK3D3030TNW3-22733030TN2-HNTRXABP N42A W3030CDABP N42A 3LR3030CD3030TN2 ABP N42A 33030CD /ABP N42A 43030CD3030SN2K ABP N42A 30PBKDcross referenceGC2430LABP N42A 42430CD3433051 ABP N42A 43036CDPLBTS-3036ABP N42A 43036CD3636TN3ABP N42A 43636CDGC3030L ABP N42A 33030C3D /ABP N42A 43030C3D3437051 ABP N42A 43636CDPLBTS-3636ABP N42A 43636CDGP3030LKABP N42A 30PBK3DGC3030LCWGC3030RABP N42A W3030CDABP N42A 3LR3030CDGC3030 ABP N42A 33030CD /ABP N42A 43030CDCOMP. P/NSB83030SB43030TRPAlliance P/NABP N42A 30PBK3DABP N42A 3LR3030CDGP3030KGC3036GC3636ABP N42A 30PBKDABP N42A 43036CDABP N42A 43636CDSB13030 ABP N42A 33030CD /ABP N42A 43030CDSB63030 ABP N42A 30PBKDSB23030ABP N42A 13030CDSB23030ABP N42A 23030CDSB33030ABP N42A 13030C3DSB33030ABP N42A 23030C3DSB53030ABP N42A 13030PD1112

Find your nearest dealer atalliancetruckparts.comDTNA/PSM-M-799. Specifications are subject to change without notice. Copyright © Daimler Trucks North America LLC. All rights reserved. Alliance Truck Parts is a brand ofDaimler Trucks North America LLC, a Daimler company. *See warranty for complete details and limitations.