Boot & Retainer

Refer to Replacement Parts Section 12
Note: (a) To ensure correct stroke alert positioning, these kits must be used only on the designated MGM Brake units.
(b) This model must be used with MGM Brakes heavy-duty weld reinforced mounting base or 8 - gauge non-pressure
housing.

11
12
13

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.

2

Welded Yoke Chamber

3
4

1.3”(33 mm)
5/5a

Y

1
6

7

Y = 2.25”
For more welded yoke choices, see page 104.
8
9/9a
10/10a

Note: Product information and specifications subject to change without notice.

15

www.mgmbrakes.com

DOUBLE DIAPHRAGM - STANDARD STROKE

Replacement Parts

TR-HD
Standard Stroke Model

Combination
D

Piggyback Plus Kit
VMRS# 013-004-000

VMRS# 013-004-001

DOUBLE DIAPHRAGM - STANDARD STROKE

B
A

X
F
G

E
C

• Tamper Resistant Design
• Molded Nitrile Rubber Push-Rod Air Seal
• Center Hole Shield
• Externally Stored Release Bolt
• Epoxy-Coated Head, Non-Pressure
Chamber and Lower Push-Rod Assembly
• Epoxy Coated Return Spring
• 360 Aluminum Center Case
• Weatherseal™ Plug

TR-HD Model Features

• Heavy-Duty Steel Non-Pressure Chamber
(8-Gauge Standard on Type 3030 & 3036 Aftermarket Models)
• Stroke Alert
• Polymer Push-Rod Guides
• Heavy-Duty Nylon Reinforced Diaphragms
• Heavy-Duty Nylon Reinforced Neoprene Diaphragms (Optional)
• Heavy-Duty Power Spring 160 lb (72.6 kg) additional parking
brake force @ 1.25 inches (31.8 mm) of stroke
• Center Hole Diaphragm (U.S. Patent #5,507,217)
• Composite Guide - Corrision Fighter Technology (patent pending),
type 30 spring side models only

P/N Series

3624

3630

Model

TR2430LHD

TR3030HD

Size

2430

3030

Stroke

2.50” (63.5 mm)

2.50” (63.5 mm)

P/N Combination SAE

3624051

3630051

P/N Neoprene Diaphragm

N/A

3630851

P/N Welded Yoke (2.25”)

3624951

N/A

P/N Piggyback Plus Kit SAE

3624008

3630008

P/N Combination METRIC

3624049

3630049

Wt. Combination

18.6 lb (8.4 kg)

19.9 lb (9.0 kg)

Wt. Single

11.7 lb (5.3 kg)

11.5 lb (5.2 kg)

A

9.04” (229.6 mm)

9.04” (229.6 mm)

B

6.91” (175.5 mm)

6.66” (169.2 mm)

C

7.38” (187.5 mm)

8.31” (211.1 mm)

D

8.21” (208.5 mm)

8.21” (208.5 mm)

E

4.75” (120.7 mm)

F

5/8” - 11 UNC (M16 x 1.5 - 6g)

G

5/8” - 18 UNF (M16 x 1.5 - 6g)

Inlets

3/8” - 18 NPTF (M16 x 1.5 - 6H)

X - Min. (in the caged position)

8.00” (203.2 mm)

Note: Product information and specifications subject to change without notice.

www.mgmbrakes.com

16

TR-HD
Standard Stroke Model
P/N Series
Model

3624

3630

TR2430LHD

TR3030HD

1

Kit - NP Chamber (a)

9015219

9015050

2

Kit - Nuts & Bolts

9003001

9003001

3

Clamp Band Assembly

8216025

8216045

4

Diaphragm

8017141

8017730

5

Kit - Push-Rod Assembly (a) SAE

9064002

9064003

5a

Kit - Push-Rod Assembly (a) METRIC

9064016

9064035

6

Return Spring

8068002

8068002

7

Kit - Center Hole Shield

9065002

9065002

8

NP Chamber Assembly (a)

8215294

8215501

9

Kit - Nuts & Washers SAE

9002001

9002001

9a

Kit - Nuts & Washers METRIC

9002002

9002002

10

Hex Nut - Yoke SAE

8130004

8130004

10a

Hex Nut - Yoke METRIC

8130016

8130016

11

Kit - Weatherseal™ Plug

9019005

9019005

12

Kit - Release Bolt

9007003

9007003

13

Kit - Piggyback Plus SAE

3624008

3630008

OPTIONAL ITEMS - For additional replacement parts, refer to Section 12
Yoke Assembly

Refer to Replacement Parts Section 12

Boot & Retainer

Refer to Replacement Parts Section 12

Note: (a) To ensure correct stroke alert positioning, these kits must be used only on the designated MGM Brake units.
11
12
13

2
3
4

5/5a
1
6

7

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 center-seal
life and eliminates the effects of severe vibration.
Corrosion Fighter Guide depicted in orange for
visual purposes only.

8
9/9a
10/10a

Note: Product information and specifications subject to change without notice.

17

www.mgmbrakes.com

DOUBLE DIAPHRAGM - STANDARD STROKE

Replacement Parts

TR-T
Standard Stroke Model

Combination

Piggyback Plus Kit
VMRS# 013-004-000

D

DOUBLE DIAPHRAGM - STANDARD STROKE

VMRS# 013-004-001

B
A

X

F
E
C

G

• Tamper Resistant Design
• Molded Nitrile Rubber Push-Rod Air Seal
• Center Hole Shield
• Externally Stored Release Bolt
• Epoxy-Coated Head, Non-Pressure
Chamber and Lower Push-Rod Assembly
• Epoxy Coated Return Spring
• 360 Aluminum Center Case
• “Long Life” Power Spring
• Weatherseal™ Plug

TR-T Model Features

• Heavy-Duty Steel Non-Pressure Chamber
(8-Gauge Standard on Type 3030 & 3036 Aftermarket Models)
(6-Gauge Standard on Type 36 Models)
• Stroke Alert
• Polymer Push-Rod Guides
• Heavy-Duty Nylon Reinforced Diaphragms
• Heavy-Duty Nylon Reinforced Neoprene Diaphragms (Optional)
• External Breather Tube
• Composite Guide - Corrision Fighter Technology (patent pending),
type 30 spring side models only

P/N Series

3421

3426

3428

3435

3431

3432

3436

Model

TR2024T

TR2424LT

TR2430LT

TR3024T

TR3030T

TR3036T

TR3636T

Size

2024

2424

2430

3024

3030

3036

3636

Stroke

2.25” (57.2 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)

3.00” (76.2mm)

P/N Combination SAE

3421051

3426051

3428051

3435051

3431051

3432051

3436051

P/N Neoprene Diaphragm

N/A

N/A

3428851

3435851

3431851

3432851

3436851

P/N Welded Yoke (2.25”)

N/A

N/A

3428951

N/A

3431951

3432951

3436951

P/N Piggyback Plus Kit SAE

N/A

N/A

3428008

3435008

3431008

3432008 (b)

3436008

P/N Combination METRIC

3421049

3426049

3428049

3435049

3431049