Underlift Hydraulics

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Miller Industries Double Holding Valve | Part #0301730

Ensure maximum hydraulic safety and load control for your heavy-duty recovery equipment with the Genuine Miller Industries Double Holding Valve (Part #0301730). Designed specifically for demanding wrecker and underlift hydraulic circuits, this OEM dual counter-balance holding valve prevents uncontrolled movement and maintains system pressure during lifting, tilting, and holding operations.

Key Features & Benefits

• OEM Safety & Quality: Authentic Miller Industries replacement part built to precise factory standards for critical underlift and boom hydraulic control systems.

• Dual Hydraulic Holding Control: Features a double counterbalance design that locks fluid in hydraulic cylinders, locking loads in place and guarding against thermal expansion or line failure.

• Smooth Load Handling: Provides stable, controlled lowering and positioning under heavy loads, eliminating sudden drift or hydraulic shock.

• Heavy-Duty Durability: Engineered to withstand high operating pressures and fluid temperatures in harsh towing environments.

Specifications

• Brand: Miller Industries

• Part Number: 0301730

• Product Type: Double Holding Valve / Dual Counterbalance Valve

• Application / Fitment: Compatible with various Miller Industries units, including Challenger CH-35/CH-45, Century 1150/SDU series, and underlift hydraulics

• Assembly Location: Underlift & Boom Tilt Hydraulic Assemblies

• Condition: Brand New OEM Replacement

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Keep hydraulic line routing secure, organized, and vibration-free with the genuine Miller Industries 1/2" Rubber Split Bushing (MPN: 0302549). Engineered specifically for hydraulic tube clamping assemblies on Miller Industries wrecker and recovery units, this split bushing dampens system vibration, resists wear, and holds 1/2" lines firmly in place.

Key Features & Benefits

• Genuine Miller OEM Replacement: Manufactured to exact factory specifications for dependable performance and proper fitment.

• Vibration & Wear Protection: Durable rubber construction isolates hydraulic hard lines, reducing friction, chafing, and system noise caused by heavy equipment operation.

• Easy Installation: The split-side design enables fast retrofit or replacement directly over existing lines without disassembling hydraulic fittings or system plumbing.

• Secure Line Retention: Integrates directly with standard Miller stacking hydraulic tube clamp assemblies and stacking nuts.

Technical Specifications

• Part Number: 0302549

• Alternate Description: Rubber Split Bushing (C-SB10-8 1/2)

• Inner Diameter / Line Size: 1/2" ID

• Material: Heavy-Duty Molded Rubber

• Primary Application: Hydraulic line/tube clamping unit assemblies

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The Miller 0303094 is a genuine Parker 5-spool hydraulic control valve body designed for heavy-duty towing and recovery equipment. Engineered for precise fluid control, this hydraulic valve allows operators to manage up to five independent hydraulic functions seamlessly—such as winch, boom, or underlift operations—ensuring reliable, smooth, and responsive performance under heavy loads.

Key Features

• 5-Spool Configuration: Controls up to five separate hydraulic circuits from a single compact assembly.

• Durable Heavy-Duty Construction: Built to withstand high working pressures, harsh environmental conditions, and rigorous daily commercial use.

• Precision Parker Hydraulics: Offers exact metering and smooth directional control for safe, reliable equipment operation.

• Direct Replacement: Designed as a direct fit for compatible Miller Industries recovery equipment, including select Century units.

Technical Specifications

• Part Number: 0303094

• Manufacturer / Brand: Parker / Miller Industries

• Component Type: Hydraulic Directional Control Valve Body

• Number of Spools: 5

Common Applications & Fitment

• Compatible with select Miller Industries, Century (e.g., Century 5025/T, 5130/5230), and related rollback or wrecker hydraulic setups.

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Miller Industries OEM Underlift Extension Cylinder | Part # 0306744

Restore full hydraulic outreach and heavy recovery performance with the Genuine Miller Industries Underlift Extend Cylinder (Part #0306744). Built specifically for heavy-duty wrecker underlift assemblies, this factory replacement cylinder delivers reliable, heavy-duty hydraulic force needed to smoothly extend and retract the underlift boom under maximum payload.

Key Features & Benefits

• Genuine OEM Precision: Manufactured directly by Miller Industries to meet rigorous factory specifications, ensuring seamless hydraulic line mating and mechanical pin fitment.

• Heavy-Duty Construction: Heavy-walled barrel and precision-ground, chrome-plated rod resist scoring, corrosion, and seal degradation under extreme loading and harsh outdoor operational environments.

• Leak-Free Hydraulic Seals: Equipped with high-pressure factory seal kits engineered to prevent fluid bypass, holding steady pressure during under-reach lifts and long-distance tows.

• Direct Bolt-In Replacement: Drop-in fit designed to match original mounting geometry, reducing downtime during repair or maintenance overhauls.

Equipment Compatibility

Designed for heavy-duty towing and recovery units utilizing Miller Industries underlift assemblies, including:

• Century Heavy-Duty Wreckers: Century 7035

• Challenger Series: CH-31 / CH-32 Heavy-Duty Units

  (Always verify your specific unit's parts manual or chassis serial number prior to ordering.)

Specifications

• Brand: Miller Industries

• Part Number: 0306744

• Description: Complete Underlift Extension Cylinder

• Product Condition: New OEM Replacement Part

• Shipping Class: Freight Required 

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Miller Industries Heavy-Duty Hydraulic Fold Cylinder | Part #0306746

Keep your heavy recovery unit operating smoothly and reliably with the Genuine Miller Industries Hydraulic Fold Cylinder (Part #0306746). Engineeered for heavy-duty wrecker and rotator underlift fold mechanisms, this OEM hydraulic cylinder provides smooth articulation and exact control under severe recovery loads.

Constructed from high-tensile steel with heavy-duty seals, this direct factory replacement ensures minimal down time and max lifting performance for your fleet.

Key Features & Benefits

• Genuine OEM Precision: Manufactured to original Miller Industries factory tolerances, ensuring perfect alignment and direct drop-in replacement.

• Heavy-Duty Construction: Built with rugged cylinder walls, chrome-plated rods, and high-pressure dynamic seals to prevent leaks and withstand extreme working environments.

• Smooth Underlift Articulation: Ensures power, precise folding movement, and stability during setup, transport, and towing operations.

Compatibility & Fitment

This hydraulic fold cylinder fits a wide range of Miller Industries heavy-duty wreckers, rotators, and detachable towing units equipped with hydraulic fold underlifts:

• Century Series:

  • Century 5130

  • Century 5230

  • Century 9055

  • Century 1150

• Holmes Series:

  • Holmes DTU (Detachable Towing Unit)

  • Holmes DTU Gen II

• Underlift Systems:

  • SDU/4 Underlift Assemblies

Technical Specifications

• Brand: Miller Industries

• Part Number: 0306746 

• Category: Hydraulic Cylinders / Underlift Fold Assembly

• Application: Heavy-Duty Wrecker & Rotator Systems

• Condition: New OEM Replacement Part

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Miller Hydraulic Holding Valve (4,000 PSI SAE) | Part #0307107

Maintain maximum load safety and hydraulic stability on your towing equipment with the Genuine Miller Industries Hydraulic Holding Valve (Part #0307107). Designed specifically for heavy-duty wrecker tilt cylinders, boom elevation, and underlift hydraulic circuits, this safety valve prevents fluid backflow and unintended cylinder movement during load operations.

Key Features & Benefits

• OEM Safety & Quality: Authentic Miller Industries factory replacement part manufactured to strict tolerance standards for Century, Vulcan, and Miller towing systems.

• High-Pressure Performance: Rated for heavy-duty commercial hydraulic systems operating at pressures up to 4,000 PSI.

• Load Holding Protection: Acts as a vital safety check valve to prevent hydraulic drift, hose-burst failure, or uncontrolled cylinder drop under load.

• SAE Porting: Built with standard SAE fluid connections for a secure, leak-free seal and direct line integration.

Specifications

• Brand: Miller Industries

• Part Number: 0307107

• Product Type: Hydraulic Holding Valve / Counterbalance Valve

• Pressure Rating: 4,000 PSI

• Porting Type: SAE Threaded

• Common Applications: Century 4024 / T2, 1040B, 1130/1140, 1150, Rotator SDU series tilt and lift cylinders

• Condition: Brand New OEM Replacement

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