OTR OTR3030SB2 | Type 30/30 Standard Stroke Spring Brake Chamber

OTR OTR3030SB2 Type 30/30 Standard Stroke Spring Brake Chamber

Maintain dependable air brake system performance with the OTR OTR3030SB2 Type 30/30 Standard Stroke Spring Brake Chamber. Designed for compatible heavy-duty trucks and trailers, this combination spring brake chamber provides service braking and spring-applied parking brake functionality in a durable, corrosion-resistant assembly.

Featuring a 2.5-inch standard stroke, 8-inch pushrod, reinforced mounting studs, and epoxy-coated steel housing, the OTR3030SB2 is engineered for demanding commercial vehicle applications. Its heavy-duty construction makes it a practical replacement for worn, damaged, or leaking Type 30/30 brake chambers when all installation specifications match.

Important: This is a standard-stroke brake chamber, not a long-stroke model. Verify the original chamber configuration before ordering.

OTR OTR3030SB2 Features & Benefits

• Type 30/30 Combination Chamber: Combines normal service braking and spring-applied parking brake functions in one assembly.
• 2.5-Inch Standard Stroke: Designed for compatible standard-stroke air brake systems.
• 8-Inch Pushrod: Provides the specified pushrod configuration for properly matched brake applications.
• Epoxy-Coated Steel Housing: Non-pressure epoxy coating helps resist corrosion and rust in demanding road environments.
• Heavy-Duty 10-Gauge Housing: Durable construction for commercial truck and trailer service.
• Reinforced Mounting Studs: Designed to provide mounting strength and rigidity.
• Zinc-Coated Clamp Bands: Matched-stamping construction helps maintain secure sealing and long service life.
• CNC-Welded Pushrod Plate: Thick steel pushrod plate engineered for strength and durability.
• Protective Dust Shield: Helps keep dirt, sand, and moisture away from vulnerable brake chamber components.
• Caging Bolt Included: Supplied with the manufacturer's specified caging bolt for approved service procedures.
• 2-Year Limited Warranty: Listed manufacturer/distributor warranty, subject to applicable terms.

Heavy-Duty Type 30/30 Air Brake Chamber

The OTR3030SB2 spring brake chamber is a combination air brake actuator used in compatible commercial vehicle braking systems.

It performs two important functions:

• Service Braking: Compressed air enters the service chamber and moves the diaphragm and pushrod to actuate the foundation brake system.
• Parking and Emergency Braking: The internal power spring applies the parking brakes when release air pressure is removed or becomes insufficient.

Correct brake chamber sizing and installation are essential for maintaining proper brake operation and vehicle safety.

Commercial Truck & Trailer Applications

OTR Type 30/30 spring brake chambers are used in various commercial vehicles equipped with compatible air-operated foundation brakes.

Potential applications include:

• Class 7 and Class 8 semi trucks
• Commercial truck tractors
• Heavy-duty trailers
• Dry van and flatbed trailers
• Vocational trucks
• Dump trucks
• Commercial fleet vehicles
• Other vehicles using compatible Type 30/30 standard-stroke spring brake assemblies

Fitment Note: Vehicle make, model, and axle position do not establish compatibility by themselves. Verify the original brake chamber size, stroke, pushrod length, mounting dimensions, and brake linkage requirements.

Corrosion-Resistant Epoxy-Coated Housing

Commercial truck brake components are routinely exposed to moisture, road salt, dirt, and debris. The OTR3030SB2 features a non-pressure epoxy-coated steel housing designed to help protect against long-term corrosion.

The zinc-coated clamp bands and protective dust shield provide additional protection against environmental contamination and support durable operation in heavy-duty service conditions.

Reinforced Mounting Studs & Heavy-Duty Pushrod Plate

The OTR3030SB2 incorporates reinforced mounting studs to help resist mounting damage and maintain structural rigidity.

Its thick steel pushrod plate features CNC-welded construction designed for demanding commercial braking applications. Proper installation and brake linkage alignment are essential to achieving the intended service performance.

Standard Stroke vs. Long Stroke Brake Chambers

The OTR3030SB2 is a Type 30/30 standard-stroke brake chamber with a 2.5-inch maximum rated stroke.

Standard-stroke and long-stroke chambers have different stroke capabilities and may have different identification markings, adjustment limits, and service requirements.

Do not substitute this standard-stroke brake chamber for a long-stroke unit. Always confirm the correct stroke designation using the original chamber and vehicle manufacturer's specifications.

OTR OTR3030SB2 Cross References

Commercial truck parts catalogs associate OTR3030SB2 with several standard-stroke Type 30/30 brake chamber references, including:

• OTR: OTR3030SB2
• OTR Manufacturer Number: OTR3030SB-2
• Power Products: 3030SB
• Automann: 179.SB3030S
• Bendix: K129605
• Bendix: NT3030STD78TC
• Dayton: 3030C
• Meritor: 3030TN2C
• MGM Brakes: 3430051
• MGM Brakes: 3630051
• OTR: OTR3030SB

Cross-Reference Warning: These numbers are catalog interchange references, not a guarantee of identical configurations. Pushrod lengths, clevis arrangements, stroke specifications, and other installation requirements may differ. Confirm all critical dimensions and the approved application before replacing a brake chamber.

Signs of a Failing Spring Brake Chamber

A defective brake chamber can affect parking brake release, service brake operation, and air system performance. Brake problems should be diagnosed promptly by a qualified technician.

Common symptoms include:

• Audible air leaks near the brake chamber
• Difficulty releasing the parking brakes
• Abnormal pushrod travel
• Visible corrosion or damage to the chamber housing
• Damaged mounting studs or brackets
• Inconsistent brake application or release
• Failed commercial vehicle brake inspections

Other brake system components can produce similar symptoms. Inspect the air supply system, control valves, slack adjusters, foundation brakes, and related components before determining the necessary repair.

OTR OTR3030SB2 Product Specifications

• Brand: OTR
• Part Number: OTR3030SB2
• Manufacturer Part Number: OTR3030SB-2
• Product Type: Combination Spring Brake Chamber
• Chamber Size: Type 30/30
• Service Chamber Type: Type 30
• Spring Chamber Type: Type 30
• Stroke Type: Standard Stroke
• Stroke Length: 2.50 Inches
• Pushrod Length: 8.00 Inches
• Mounting Stud Spacing: 4.75 Inches, Center to Center
• Mounting Stud Threads: 5/8-11
• Housing: Heavy-Duty Epoxy-Coated Steel
• Chamber Configuration: Double Diaphragm, Spring Combination
• Caging Bolt: Included
• Warranty: 2 Years, Subject to Warranty Terms
• VMRS: 013-010-034
• Quantity: 1 Spring Brake Chamber

Brake Chamber Installation & Safety Information

Before ordering or installing the OTR3030SB2, verify the original brake chamber's size, stroke, pushrod length, mounting stud spacing, clevis requirements, and applicable brake system specifications.

Brake chamber installation must follow the vehicle and brake manufacturer's approved procedures. Inspect brake linkage geometry, pushrod travel, mounting hardware, and related foundation brake components before returning the vehicle to service.

Critical Safety Warning: Spring brake chambers contain a powerful compressed spring that can cause severe injury or death if improperly handled. Never cut, open, or disassemble the spring brake housing. Follow the manufacturer's approved procedures for caging, removal, installation, and testing.

Professional Installation Recommended: Air brake systems are safety-critical. All brake chamber replacement and adjustment work should be performed by qualified personnel.