OTR OTR3030SB | 30/30 Standard Stroke Spring Brake Chamber

OTR OTR3030SB Type 30/30 Standard Stroke Spring Brake Chamber

Maintain reliable commercial vehicle braking performance with the OTR OTR3030SB Type 30/30 Standard Stroke Spring Brake Chamber. Designed for compatible heavy-duty trucks and trailers, this combination spring brake chamber provides both service braking and spring-applied parking brake functionality in one durable assembly.

Featuring a 2.5-inch standard stroke, 9.75-inch pushrod, reinforced mounting studs, and heavy-duty construction, the OTR3030SB is engineered to withstand demanding commercial vehicle operating conditions.

Whether you're replacing a leaking brake chamber, repairing a trailer air brake system, or maintaining a commercial truck fleet, the OTR3030SB provides a replacement option for properly matched Type 30/30 brake applications.

Important: This product is a standard-stroke brake chamber with a 9.75-inch pushrod. Verify your existing brake chamber specifications before ordering.

OTR OTR3030SB Features & Benefits

• Type 30/30 Combination Brake Chamber: Combines service braking and spring-applied parking brake functions in one assembly.
• 2.5-Inch Standard Stroke: Designed for compatible standard-stroke air brake systems.
• 9.75-Inch Pushrod: Provides the specified pushrod length for properly matched brake linkage configurations.
• Reinforced Mounting Studs: Designed to provide additional rigidity and resist mounting-related damage.
• Heavy-Duty Steel Pushrod Plate: Thick steel construction with precision welding for strength and durability.
• Protective Dust Shield: Helps keep dirt, sand, moisture, and road contaminants away from vulnerable components.
• Corrosion-Resistant Construction: Designed for demanding commercial truck and trailer environments.
• Caging Bolt Included: Supplied for use during approved brake chamber service procedures.
• SAE Standards: Manufacturer identifies the chamber as meeting or exceeding applicable SAE requirements.
• 4-Year Limited Warranty: Listed warranty coverage, subject to applicable supplier terms and conditions.

Heavy-Duty Type 30/30 Spring Brake Chamber

The OTR3030SB spring brake chamber is a combination air brake actuator used in commercial vehicle drum brake systems.

It performs two essential braking functions:

• Service Braking: Compressed air acts on the service chamber diaphragm, moving the pushrod to operate the foundation brake mechanism.
• Parking and Emergency Braking: A powerful internal spring applies the parking brakes when spring-brake release pressure is removed or becomes insufficient.

The Type 30/30 designation identifies the service and spring brake chamber sizes. Proper chamber selection is essential for maintaining the braking system's intended performance.

Commercial Truck & Trailer Applications

The OTR3030SB is designed for compatible heavy-duty commercial vehicle air brake systems requiring a Type 30/30 standard-stroke combination chamber.

Potential applications include:

• Heavy-duty semi trucks
• Class 7 and Class 8 commercial trucks
• Truck tractors
• Commercial trailers
• Dry van and flatbed trailers
• Vocational trucks
• Dump trucks
• Commercial fleet vehicles

Fitment Note: Compatibility depends on the installed brake system, chamber configuration, pushrod length, mounting dimensions, and brake linkage requirements. Vehicle make and model alone do not establish fitment.

9.75-Inch Pushrod for Standard-Stroke Applications

One of the most important specifications of the OTR3030SB is its 9.75-inch pushrod length.

Different Type 30/30 spring brake chambers may have similar external appearances but different pushrod lengths and installation requirements.

For example, the OTR3030SB uses a 9.75-inch pushrod, while the OTR3030SB2 is listed with an 8-inch pushrod.

Always verify the required pushrod configuration, clevis arrangement, and brake linkage geometry before selecting a replacement chamber.

Standard Stroke vs. Long Stroke Brake Chambers

The OTR3030SB features a nominal 2.5-inch standard stroke.

Standard-stroke and long-stroke chambers have different operating travel capabilities and may have different adjustment limits and identification markings.

Do not substitute this standard-stroke brake chamber for a long-stroke chamber. Confirm the original equipment stroke designation before ordering.

Heavy-Duty Construction & Corrosion Protection

Commercial truck and trailer brake components are regularly exposed to road moisture, dirt, salt, vibration, and demanding operating conditions.

The OTR3030SB incorporates reinforced mounting studs, a durable steel pushrod plate, and a protective dust shield to help maintain structural integrity and reduce exposure to contaminants.

The chamber is designed and tested for demanding commercial braking applications.

OTR OTR3030SB Cross References

The OTR3030SB appears in commercial truck parts interchange catalogs alongside other Type 30/30 standard-stroke spring brake chamber products.

Relevant catalog references include:

• OTR: OTR3030SB
• MGM Brakes: 3430551
• Meritor: 3030TN2ULP-C
• Haldex: LCP3030R
• Haldex: GC3030R
• Industry Interchange Reference: BTS-3030

Cross-Reference Warning: Catalog interchange numbers are intended for parts identification only. Confirm stroke, pushrod length, mounting dimensions, clevis configuration, and applicable brake system specifications before treating any listed part as a direct replacement.

Signs of a Failing Spring Brake Chamber

Brake chamber problems should be diagnosed promptly because they can affect commercial vehicle braking performance and safety.

Common symptoms include:

• Air leaking from the brake chamber
• Difficulty releasing the parking brakes
• Abnormal or excessive pushrod travel
• Visible corrosion or physical damage
• Damaged mounting studs or brackets
• Inconsistent brake application or release
• Failed commercial vehicle brake inspections

Other brake system problems may produce similar symptoms. Inspect the air supply system, control valves, slack adjusters, foundation brakes, and related components before replacing the chamber.

OTR OTR3030SB Product Specifications

• Brand: OTR
• Manufacturer Part Number: OTR3030SB
• 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: 9.75 Inches
• Mounting Stud Spacing: 4.75 Inches, Center to Center
• Mounting Stud Threads: 5/8-11
• Mounting Stud Length: 1.54 Inches
• Chamber Configuration: Combination Spring Brake
• Brake Application: Compatible Heavy-Duty Drum Brake Systems
• Caging Bolt: Included
• Warranty: 4-Year Limited Warranty
• VMRS: 013-010-034
• Quantity: 1 Brake Chamber

Brake Chamber Installation & Safety Information

Before purchasing or installing the OTR3030SB, verify the original brake chamber size, stroke designation, pushrod length, mounting stud spacing, clevis requirements, and applicable brake system specifications.

Follow the vehicle and brake manufacturer's approved installation and inspection procedures. Confirm correct brake linkage geometry, pushrod travel, chamber mounting, and foundation brake operation before returning the vehicle to service.

Critical Safety Warning: Spring brake chambers contain powerful compressed springs 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: Commercial vehicle braking systems are safety-critical. Brake chamber replacement, adjustment, and inspection should be performed by qualified technicians.