NHTSA ID Number: 10189433
Manufacturer Communication Number: MGM Catalogue
TSB/Document Date: 2021-03-29
Summary
MGM Brakes catalogue
3232952
3232952
Make sure long-stroke and standard-stroke
is not mixed on the same axle
Steer Axle
Front/Rear
Rear/Rear
Comments
1427801 Threaded
1427902 Welded
3431953
3431953
3431954
3431954
Replace Threaded-Rod Steer with another
threaded-rod if it was OEM
Steer Axle
Front/Rear
Rear/Rear
Comments
1427801 Threaded
1427902 Welded (2.5”)
1428902 Welded (3.0”)
3532851
3532851
Steer Axle Left
Steer Axle Right
Comments
1427717
1427716
MJB2424ET752
New. Rear Chambers are Piston-type brake
chambers
Steer Axle
Front/Rear
Rear/Rear
Comments
1427902 (2.5”)
1428902 (3.0”)
3532954
3532954
3532953
3532953
Steer Axle
Front/Rear
Rear/Rear
Comments
1427902 (2.5”)
1428902 (3.0”)
3233952
3233952
3233953
3233953
Make sure long-stroke and standard-stroke
is not mixed on the same axle
Application:
Steer Axle
Front/Rear
Rear/Rear
Comments
2005+ Autocar and Peterbilt
with S-Cam
Brakes
1427904 Type 24
1430904 Type 30
3431955
3431955
Application:
Steer Axle
1427902 (2.5”)
1428902 (3.0”)
3436952
3436952
Steer Axle
Front Rear
Rear/Rear
1428902 (3.0”)
3532954
3532954
All Mack, International, Freightliner,
Sterling 2005 and older & all CCC,
Autocar, Kenworth, Peterbilt
Application:
2006+ Freightliner, Sterling, Western
Star, International with Long-Stroke
brake chambers
Application:
VOCATIONAL APPLICATIONS
2006+ Mack Camelback Suspension
(All) and Hendrickson with 3030
chambers (standard stroke)
Application:
2005-2006 Mack with Henrickson
Haulmaxx Suspension using 3036
chambers on rear axles (threaded-rod
only)
Application:
2010+ Autocar with Meritor Air-Disc
Brakes
Application:
2006+ Mack with Hendrickson Spring
Suspension using welded-yoke
chambers
Application:
2006+ Mack Camelback Suspension
with optional long-stroke brake
chambers
2007+ Mack with Type 3636 on singleaxle
Application:
2010+ Mack with Primaxx AirSuspension
Comments
Threaded-Rod Chambers with
Neoprene Diaphragms
Do not replace 3036 with 3030 if
original spec was 3036
On steer axle, make sure to match the
correct stroke
New Welded-Yoke Chambers
Comments
On steer axle, make sure to change the
correct stroke
Comments
One chamber for both rear axles-welded
yoke
NOTE: The listing above is based on known specifications of various manufacturers; however, certain applications may differ than shown. MGM
suggests contacting the truck’s manufacturer to verify the proper chamber and rod length to assure proper chamber replacement.
Y - DIM.
!
1.3
WARNING: Every day, more and more vehicles are being manufactured with spring
brakes and service chambers with the yoke welded to the service push rod.
Units manufactured with a welded yoke have a preset “Y” dimension, measured from
the bottom of the NPC to the center-line of the yoke pin. There are many different
preset “Y” dimensions depending on the application. It is very important that you
obtain this “Y” measurement from your current chamber in order to replace “like for
like” to continue proper operation.
Note: Product information and specifications subject to change without notice.
104
Welded
Yoke
Forged Yoke
& Jam Nut
• Reduce chamber replacement time
• No push-rod cutting required, made for easy install
• Maintain exact OEM chamber to slack adjuster factory set-up
• Will fit single and most dual pin slack adjusters
• Reduce road call time with a few of the most popular parts
• Common part numbers for a variety of make and model
of trucks and tractors
SAFETY
• Maintain OEM engineered safety
(incorrect rod cutting can affect proper brake adjustment)
105
VOCATIONAL APPLICATIONS
TIME
106
SECTION 10
Page(s)
Section 10: Special Application........................................................ 106-113
TR, TR-T, TR-TS, LTR-L3, and MJS Transit Bus Brakes and Other Special Applications..........................................108
Actuators Manufactured with Neoprene Diaphragms...................................................................................................109
Welded Yoke Application Guide............................................................................................................................. 110-111
SPECIAL APPLICATIONS
SAE/METRIC Mixed Parts List.....................................................................................................................................112
Note: Product information and specifications subject to change without notice.
107
SPECIAL APPLICATIONS
Special Transit Length Push-Rods
VMRS # 13-004-000
Available aftermarket options & part numbers for assemblies requiring “X” dimensions longer than standard 8.00” (203.2 mm) fully threaded push-rod.
All Models
Type 24
Type 30
Type 36
SPECIAL APPLICATIONS
“X” Dimension
12.00” (304.8 mm)
18.00” (457.2 mm)
12.00” (304.8 mm)
18.00” (457.2 mm)
12.00” (304.8 mm)
18.00” (457.2 mm)
Push-Rod Diameter
5/8” (15.9 mm)
3/4” (19.1 mm)
5/8” (15.9 mm)
3/4” (19.1 mm)
5/8” (15.9 mm)
3/4” (19.1 mm)
Threaded Length
5.00” (127.0 mm)
7.00” (177.8 mm)
5.00” (127.0 mm)
7.00” (177.8 mm)
3.00” (76.2 mm)
9.00” (228.6 mm)
Part Number Designator
xxxx551
xxxx651
xxxx551
xxxx651
xxxx551
xxxx651
Kit - Push-Rod Assembly
9064553
9064653
9064551
9064651
9064552
9064652
NOTE: Generic replacement parts for Hendrickson Intraax / Vantraax Suspension ends in 551 suffix.
NOTE: We offer some direct OEM replacement part numbers for transit applications. Contact MGM Brakes customer service for details.
NOTE: xxxx represents: P/N series for model groups.
TR-T Model
TR-LP3T Model
LTR-L3T Model
Note: For yoke pin and mounting hardware replacement parts refer to Section 12.
For custom replacement assemblies, contact MGM Brakes Sales.
Note: Product information and specifications subject to change without notice.
108
MJS Model
SPECIAL APPLICATIONS
Actuators Manufactured with Neoprene Diaphragms
MGM Brakes manufactures service chambers and spring brakes with “Neoprene” diaphragms for severe service applications where
petroleum saturated contaminants may enter the air system and come into contact with the diaphragms.
While “Natural Rubber” diaphragms may resist the negative effects of oil and oil saturated contaminants for a period of time, “Neoprene”
diaphragms have proven to be more durable. Manufactured from a combination of materials that insure superior strength, flexibility and
resistance to degradation due to contact with oil and other chemicals, “Neoprene” diaphragms are a great option when the air system is
prone to contamination from oil.
PART #
MODEL
DESCRIPTION
PART #
MODEL
DESCRIPTION
1420801
C20
Service Chamber
3431851X
TR3030T
Combination - (Bulk) 20 pcs./box
1427801
C24L
Service Chamber
3431953
TR3030T
Combination, welded yoke
1427902
C24L
Service Chamber, welded yoke
3431953X
TR3030T
Combination - (Bulk) 20 pcs./box
1428801
C24L3
Service Chamber
3431954
TR3030T
Combination, welded yoke
1428902
C24L3
Service Chamber, welded yoke
3431954X
TR3030T
Combination - (Bulk) 20 pcs./box
1430801
C30
Service Chamber
3431955
TR3030T
Combination, welded yoke
1430902
C30
Service Chamber, welded yoke
3431955X
TR3030T
Combination - (Bulk) 20 pcs./box
1436801
C36
Service Chamber
3432851
TR3036T
Combination
1628902
CS24L3
Service Chamber, welded yoke
3432952
TR3036T
Combination, welded yoke
3230851
TR3030LP3
Combination
3433808
TR3036
Piggyback Plus Kit
3230851X
TR3030LP3
Combination, (Bulk) 20 pcs./box
3433851
TR3036
Combination
3231851
TR3030LP3T
Combination
3433851X
TR3036
Combination - (Bulk) 12 pcs./box
3231851X
TR3030LP3T
Combination - (Bulk) 20 pcs./box
3435851
TR3024T
Combination
3231953
TR3030LP3T
Combination, welded yoke
3436851
TR3636T
Combination
3231955
TR3030LP3T
Combination, welded yoke
3436952
TR3036T
Combination, welded yoke
3231955X
TR3030LP3T
Combination - (Bulk) 20 pcs./box
3531851
TR3030TS
Combination
3232808
TR3030LP3HD
Piggyback Plus Kit
3531851X
TR3030TS
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS, disc and drum brake systems
- Delivers braking power when needed by avoiding a spongy...
- Both wet and dry boiling points exceed the minimum...
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TSB/Document ID: MGM Catalogue
Replacement Service Bulletin Number:
MFR Communication Date: 2017-12-05
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, HYDRAULIC
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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