NHTSA ID Number: 10189433
Manufacturer Communication Number: MGM Catalogue
TSB/Document Date: 2021-03-29
Summary
MGM Brakes catalogue
(a)
(a)
6
Push Rod
(a)
(a)
7
Kit - Wedge Boot
9004005
9004005
8
Spanner Nut
8034001
8034001
9
Wedge Guide (Meritor
)
8024006
8024006
10
Kit - NP Chamber
Refer to Wedge Chamber service kits below (a)
***
Note: (a) Diaphragm is glued to push-rod plate, therefore diaphragm and push-rod assembly are available only as part of item 10 kit.
Note: (***) For information on availability, contact MGM Brakes Customer Service, 1-800-527-1534 x750 (U.S. and Canada), or for International email: [email protected]
For additional replacement parts, refer to Replacement Parts Section 12
Standard Service Kits
Type MJW1216AT
1
2.25” (57.2 mm)
9015247
9015254
2.85” (72.4mm)
9015248
9015255
4.10” (104.1 mm)
9015249
9015256
6.10” (154.9 mm)
9015250
9015257
2
3
5
4
6
Wedge Piston Assembly
Meritor
Bendix
10
7
Ordering: Determine if foundation brake is
Meritor or Bendix type by comparison to
piston assembly photos above.
8
9
Note: Product information and specifications subject to change without notice.
83
WEDGE
Stroke 1.75” (44.5 mm)
X Dimension
MJW
2.00”
1.75” (50.8
(44.5 mm)
mm) Stroke Model
MJW1624BT Model
Combination
Piggyback Plus Kit
VMRS# 013-004-027
D
N/A
B
A
X
E
C
MJW Model Features
WEDGE
• Tamper Resistant Design
• Lighter Weight
• Compact Size
• External Breather Tube
• Lower Hold-Off Pressure (Less Air Consumption)
P/N Series
MJW1624BT
Model
MJW1624BT
Size
1624
Stroke
2.00” (50.8 mm)
P/N Combination SAE
MJW1624BT156
P/N Piggyback Plus Kit SAE
N/A
P/N Combination METRIC
***
Wt.Combination
17.06 lb (7.7 kg)
Wt. Single
N/A
A
8.30” (210.8 mm)
B
7.16” (181.9 mm)
C
6.53” (165.9 mm)
D
6.76” (171.7 mm)
E
1 3/4” - 12 UNC
Inlets
3/8” - 18 NPTF
X
4.50” (114.3 mm)
• Patented Integral Release Bolt Mechanism for
Minimal Bolt Protrusion when manually released.
• Non-Coil Clash Power Spring
• Increased Corrosion Resistance - Steel Head and Epoxy Coated
Release Bolt
Patented “Dual Thread Release Bolt”
design, an MGM Brakes exclusive,
provides minimal bolt protrusion at
maximum release. (Approx. 1.00 inch
(25.4 mm) protrusion when manually
released)
Note: (***) For information on availability, contact MGM Brakes Customer Service, 1-800-527-1534 x750 (U.S. and Canada), or for International email: [email protected]
!
CAUTION: MGM Brakes recommends this chamber be supported. The vehicle manufacturer will
need to determine if a support is necessary based on the vehicle operating environment.
P/N MJW1624BT156 is for transit applications only. For other applications contact MGM Brakes
Customer Service.
Note: Product information and specifications subject to change without notice.
84
MJW
MJW1624BT Model
1.75”(50.8
(44.5mm)
mm) Stroke Model
2.00”
Replacement Parts
P/N Series
MJW1624BT
Model
MJW1624BT
Part Description
MGM P/N
1
Kit - Breather Tube
9081007
2
Kit - Nuts & Bolts
9003001
8216018
3
Clamp Band Assembly
4
Kit - Diaphragm/Push Rod
(a)
5
Diaphragm
(a)
6
Push Rod
7
Kit - Wedge Boot
(a)
9004005
8
Collet Nut
8034005
9
Wedge Guide
8024006
10
Kit - NP Chamber
9015196
Note: (a)
Diaphragm is glued to push-rod plate, therefore diaphragm and push-rod assembly are available only as part of item 10 kit.
For additional replacement parts, refer to Replacement Parts Section 12
WEDGE
1
2
3
5
4
6
10
7
8
9
!
CAUTION: MGM Brakes recommends this chamber be supported. The vehicle manufacturer will
need to determine if a support is necessary based on the vehicle operating environment.
P/N MJW1624BT156 is for transit applications only. For other applications contact MGM Brakes
Customer Service.
Note: Product information and specifications subject to change without notice.
85
86
SECTION 7
Air Disc Model
Page(s)
Section 7: Air Disc Brakes.................................................................. 86-93
TR Series - Standard Stroke Model
TR-T
Tamper Resistant, Tube................................................................................................................88-89
TR-THD
Tamper Resistant, Tube, Heavy-Duty...........................................................................................88-89
MJB Series - Long Stroke Model
MJB
Magnum, J-Series, 3.00” (76.2 mm) Stroke, Tube.......................................................................90-91
Service Chambers
Service Chambers........................................................................................................................92-93
Service Chambers, Sealed...........................................................................................................92-93
Note: Product information and specifications subject to change without notice.
87
AIR DISC
C
CS
TR-T & TR-THD
Air Disc Model
Combination
B
A
XB
E
C
D
Double Diaphragm Air Disc Brake Features
AIR DISC
• Tamper Resistant Design
• Molded Nitrile Rubber Push-Rod Air Seal
• Externally Stored Release Bolt
• Epoxy-Coated Head, Non-Pressure
Chamber and Lower Push-Rod Assembly
• 360 Aluminum Center Case
• Weatherseal™ Plug
• Heavy-Duty 8 Gauge Steel Non-Pressure Chamber
• Polymer Push-Rod Guides
Center Hole Diaphragm
(U.S. Patent #5,507,217)
Patented feature that aligns the piston,
diaphragm, power spring and internal push-rod
providing the following advantages: Maintains
component alignment; reduces power spring
stress; reduces coil clash; increases centerseal life and eliminates the effects of severe
vibration.
• Heavy-Duty Nylon Reinforced Diaphragms
• Heavy-Duty Nylon Reinforced Neoprene Diaphragms (Optional)
• External Breather Tube
• Heavy-Duty Power Spring 160 lb (72.6 kg) additional parking brake
force @ 1.25 inches (31.8 mm) of stroke - HD MODELS
• Center Hole Diaphragm (U.S. Patent No. 5,507,217) - Type 30 Models
Center Seal (Push-Rod Air Seal)
Multi-lipped, pressure activated seal – an
MGM exclusive - molded from specially
formulated low-temperature-resistant Nitrile
Rubber, providing long-term protection
against air leaks. Nylon guides eliminate
metal to metal contact and premature failure
in this critical area.
External Breather-Tube
Vents air from inside the protected area of
the non-pressure chamber to effectively
prevent entry of liquid and solid corrosive
contaminants that can cause premature
failure of the spring brake chamber.
Note: Product information and specifications subject to change without notice.
88
TR-T & TR-THD
Air Disc Model
DOUBLE DIAPHRAGM AIR DISC BRAKES
Model
Size
Stroke
3417
3419
3422
3423
3425
3432
3450
3650
TR1724LTHDH
TR1724LTH
TR2024LTHD
TR2024LT
TR2130LTH
TR3036T
TR2730TH
TR2730THDH
1724
1724
2024
2024
2130
3036
2730
2730
2.50” (63.5 mm)
2.50”(63.5 mm)
2.50” (63.5 mm)
2.50” (63.5 mm)
2.50” (63.5 mm)
2.50” (63.5 mm)
2.50” (63.5 mm)
2.50” (63.5 mm)
For replacement part numbers,
contact MGM Brakes Customer Service,
1-800-527-1534 x750 (U.S. & Canada),
International email: [email protected]
Part Number
SAE & METRIC
Wt. (lb/kg)
15.41 lb (7.0 kg)
15.81 lb (7.2 kg)
15.51 lb (7.0 kg)
15.95 lb (7.2 kg)
17.88 lb (8.1 kg)
19.10 lb (8.7 kg)
18.64 lb (8.5 kg)
A
8.86” (225.0 mm)
8.86” (225.0 mm)
8.86” (225.0 mm)
8.86” (225.0 mm)
9.45” (240.0 mm) 10.39” (263.9 mm) 9.40” (238.8 mm)
9.40” (238.8 mm)
B
7.34” (186.4 mm)
7.34” (186.4 mm)
7.34” (186.4 mm)
7.34” (186.4 mm)
8.21” (208.5 mm)
9.18” (233.2 mm)
8.21” (208.5 mm)
8.21” (208.5 mm)
C
6.72” (170.7 mm)
6.72” (170.7 mm)
6.72” (170.7 mm)
6.72” (170.7 mm)
- 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...
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
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 |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.