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DuraMax Type 30/24 Long Stroke Piston Spring Brake Chamber (3.0" Stroke, 5.75" Pushrod, 90°/135° Ports) | Part # DMP3024EI / 3024EI


Sale price $104.99 Regular price $149.99
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Description

Upgrade your commercial vehicle's braking reliability with the DuraMax Type 30/24 Long Stroke Piston-Type Air Brake Chamber (Part # 3024EI / DMP3024EI). Engineered with Internal Breathing Technology (IBT), this heavy-duty combination service and parking spring brake chamber prevents outside moisture, road salt, and contaminants from entering the spring cavity. Delivering over 500 lbf of extra parking force compared to conventional double-diaphragm chambers, it features a 3.0-inch long stroke, a 5.75-inch threaded pushrod, and pre-clocked 90°/135° air port and clamp band angles for hassle-free routing. Built to meet strict SAE J2318 and FMVSS 121 standards, this e-coated, tamper-resistant unit provides maximum durability and safety for heavy-duty trucks, tractors, and trailers. [1]
⭐ Key Features & Benefits
  • Internal Breathing Technology (IBT) — Eliminates external breather tubes to seal out dust, water, and corrosive road chemicals from the internal spring housing. [1]
  • 500+ lbf Extra Parking Force — Piston-actuated parking spring design generates significantly higher holding power than standard double-diaphragm chambers. [1]
  • 3.0" Long Stroke & Stroke Alert Indicator — Provides extended pushrod travel and a built-in visual indicator for quick DOT brake adjustment inspections. [1]
  • Pre-Clocked 90°/135° Configuration — Factory-aligned air ports (90°) and clamp band (135°) with a 5.75" pushrod ensure proper clearance in tight axle spaces. [1]
  • Heavy-Duty Corrosion Protection — Features an e-coated steel head, 7-gauge bottom non-pressure housing, and a non-coil-clash power spring for extended fleet life. [1]
🔧 Uses / Applications
  • Direct replacement for worn or leaking Type 30/24 long-stroke piston spring brake chambers on Class 7 & Class 8 semi-trucks and tractors.
  • Service and parking/emergency brake actuation on heavy-duty S-cam drum brake drive and trailer axles.
  • Severe-duty, vocational, and off-highway fleet applications where sealed internal breathing protects against mud, moisture, and debris.
  • DOT compliance repairs and scheduled air brake system overhauls requiring a 3.0" stroke and 5.75" pushrod length. [1, 2, 3]
📊 Technical Specifications
Specification Detail
Part Type Combination Piston-Type Spring Brake Chamber (Type 30/24 Long Stroke)
Position Drive Axle / Trailer Axle (Service & Parking/Emergency)
Part Number 3024EI / DMP3024EI (DuraMax Series)
Stroke Length 3.0 Inches (76.2 mm) — Long Stroke
Pushrod Length & Thread 5.75 Inches (5/8"-18 UNF-2A Thread)
Port / Clamp Orientation 90° Air Port Angle / 135° Clamp Band Angle (3/8"-18 NPTF Ports)
Mounting Studs 5/8"-11 UNC-2A (1.55" Length, 4.75" Spacing)
Material E-Coated Steel Head, Aluminum Alloy Center Housing, 7-Gauge Steel Base, Nylon-Reinforced Diaphragm
Fitment Universal Heavy-Duty Trucks, Tractors & Trailers with Type 30/24 Long Stroke S-Cam Air Brakes
Condition Brand New
Installation Direct-Fit Replacement (Meets SAE J2318 & FMVSS 121 Standards)
🔄 Cross‑Reference / Interchange Table
Manufacturer Equivalent Part Number
OEM (MGM Brakes) MJS3024ET051, MJS3024ET951, MJS3024ET061, MJS3024ET008, MJS3024EP051
Aftermarket A (Haldex / Bendix) GP3024L, GC3024L, NT3024ELS80, NT3024ELS99
Aftermarket B (DuraMax / TSE / Meritor) 21000-C9G00 (10" Rod Base), 3024TL, R873024L
Additional Notes Verify 5.75" pushrod length and 90°/135° port/clamp clocking prior to installation; standard OEM MGM units often ship with a 10" cut-to-length rod and external breather tube.

Disclosure Policy

This product was acquired by Freeman Liquidators from a sale of merchandise subject to a commercial insurance loss. Freeman Liquidators is a secondary seller of products, is not affiliated with or sponsored by the manufacturer of the products and is not a manufacturer authorized seller of the products. Sale of this product by Freeman Liquidators is not subject to the policies of the manufacturer. Any warranty offered by the manufacturer is not available to you as the purchaser.

All products are NEVER USED but external packaging will have damage. Some items may be placed into other packaging to ensure safe shipping. All items are opened for inspection prior to shipment to ensure the best quality of products. Freeman Liquidators guarantees your satisfaction. If you are not completely satisfied with a purchased product, within 30 days from the date of purchase, return the product in its packaging and Freeman Liquidators will fully refund your money.

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DuraMax Type 30/24 Long Stroke Piston Spring Brake Chamber (3.0" Stroke, 5.75" Pushrod, 90°/135° Ports) | Part # DMP3024EI / 3024EI

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