1994 Eaton 12F4 Front Axle Beam for Sale | OEM Used Heavy-Duty 12,000 lb Rated
$759.00
At a Glance
- Condition: OEM used, structural integrity verified
- Availability: In stock, Eaton 12F4 front axle beams available
- Shipping: Free shipping to all 50 states via heavy freight, 7 to 14 business days
- Donor truck confirmed (Freightliner, International, Kenworth, Volvo, off-road, or military)
- Axle beam length documented (60 to 80 inch range; specific length confirmed for your application)
- Kingpin bore condition assessed
- Spring pad surfaces inspected (for cracks, deformation, or pitting)
- Steering arm mounting holes verified (for cracks or thread damage)
- Brake mounting pad configuration documented
- Overall structural integrity confirmed (no bent beams or crack indications)
- No core charge required
- Backed by a 15 day replacement warranty against internal defects
Description
About the 1994 Eaton 12F4 Front Axle Beam
The 1994 Eaton 12F4 axle beam (Front) is designed for front steer axle applications and is renowned for its robust construction and reliability in heavy-duty Class 7 and Class 8 commercial trucks and specialty vehicles. Featuring a durable forged steel beam structure, it supports high axle loads and provides stability under challenging road conditions. Ideal for commercial trucks and off-road vehicles, it integrates seamlessly with suspension systems to ensure optimal handling and performance. With Eaton reputation for quality and engineering excellence, this Eaton 12F4 axle beam for sale at Part Nests meets stringent industry standards for safety and durability.
Features of the 1994 Eaton 12F4 Axle Beam (Front)
- Forged Steel Construction: Utilizes forged steel for superior strength and durability, capable of withstanding 12,000+ pounds of vertical load and the harsh operating conditions of heavy commercial trucking. Forged construction is the heavy-duty industry standard.
- Integrated Steering Geometry: Designed with integrated steering knuckle interface points to optimize steering response and handling characteristics across the full steering range.
- Advanced Suspension Compatibility: Engineered to work seamlessly with leaf spring suspensions, air-ride suspensions, and other heavy-duty truck suspension systems.
- Precision Machining: Components are precision-machined to ensure exacting tolerances and alignment, reducing wear and extending component life.
- Corrosion Resistance: Coated or treated to resist corrosion and rust, prolonging lifespan and maintaining structural integrity.
- Enhanced Seal Technology: Includes advanced sealing technologies at the kingpin interface to prevent contaminants from entering critical bearing surfaces.
- Customizable Options: Compatible with various axle ratios, brake configurations, and spring pad spacing.
- Certified Safety Standards: Complies with DOT and FMVSS industry safety standards.
Heavy-Duty Front Axle Family Context
For buyers comparing heavy-duty front axles across commercial truck and military applications, the Eaton 12F4 (this listing) is the Class 7-8 commercial front steer axle beam used across Freightliner / International / Kenworth / Volvo / Mack / Western Star / Peterbilt vocational chassis, plus articulated dump trucks (Cat 740 / Komatsu HD785) and military tactical vehicles. The Dana 70 Front Axle (our listing) is the military and heavy-duty truck front axle assembly (NOT just a beam) with full housing, ring and pinion gear set, axle shafts, kingpins, and complete steering geometry, used primarily in military M35 / M715 / HMMWV / MRAP / HEMTT and heavy-duty Ford F-450 / F-550 / Ram 3500 / Chevy C/K 3500 dually applications. The two products serve different roles: the 12F4 is a forged steel beam for commercial Class 7-8 steer axle service; the Dana 70 is a complete axle assembly typically configured for 4×4 military and heavy-duty pickup truck use. Different applications, different complete-vs-beam configurations.
Compatibility and Applications
Commercial Trucks (Class 7-8):
- Freightliner FLD120 (and successor Cascadia, Columbia, Century Class)
- International 9400 (and successor LT, ProStar)
- Kenworth T800
- Volvo VNL (multiple model years)
- Mack RD600, R-Series
- Western Star 4900, 5700
- Peterbilt 357, 365, 389 (vocational variants)
Off-Road Vehicles (Articulated Dump Trucks):
- Caterpillar 740 Articulated Dump Truck
- Komatsu HD785 Dump Truck
- Terex TA300 Articulated Dump Truck
- Bell B40D Articulated Dump Truck
Military Tactical Vehicles:
- Oshkosh HEMTT (Heavy Expanded Mobility Tactical Truck)
- BAE Systems RG-33 Mine-Resistant Ambush Protected (MRAP) vehicle
- AM General HMMWV (High Mobility Multipurpose Wheeled Vehicle)
- Navistar MaxxPro MRAP
- Oshkosh M-ATV and M-1078 series
Specialized Vocational Vehicles:
- Concrete Mixer Trucks (various brands)
- Utility Service Trucks (various configurations)
- Emergency Response Vehicles (fire trucks, ambulances)
- Agricultural Haulers (for grain transport, livestock, equipment)
Condition and Quality Assurance
Our 1994 Eaton 12F4 Axle Beam (Front) undergoes a thorough inspection process to ensure it meets our high standards, including:
- Visual inspection for cracks, deformation, or impact damage
- Magnetic particle testing of critical stress areas (when applicable)
- Kingpin bore measurement for wear and roundness
- Spring pad surface inspection
- Steering arm mounting hole inspection (for thread damage or cracks)
- Brake mounting bracket condition verification
Vehicle Compatibility
| Vehicle | Compatibility |
|---|---|
| Commercial Class 7-8 Trucks | Freightliner FLD120 / Cascadia, International 9400 / LT, Kenworth T800, Volvo VNL, Mack RD600, Western Star 4900, Peterbilt vocational variants |
| Off-Road Articulated Dump Trucks | Caterpillar 740, Komatsu HD785, Terex TA300, Bell B40D |
| Military Tactical Vehicles | Oshkosh HEMTT, BAE RG-33 MRAP, AM General HMMWV, Navistar MaxxPro MRAP, Oshkosh M-ATV |
| Specialized Vocational | Concrete mixers, utility trucks, fire trucks, ambulances, agricultural haulers |
Why Buy From Part Nests
- Donor truck or equipment confirmed
- Axle beam length and configuration documented
- Kingpin bore condition assessed
- Spring pad and steering arm interfaces inspected
- Structural integrity verified
- Free heavy freight delivery to all 50 states
- 15 day replacement warranty on internal defects
- Heavy-duty truck experienced support team on the phone
- Call (855) 634-4447 to verify application against your VIN before you order.
15 Day Replacement Warranty
Every used 1994 Eaton 12F4 front axle beam purchased through Part Nests carries a 15 day replacement warranty starting on the delivery date.
What Is Covered
- Internal defects already present when the axle beam arrives
- Structural integrity failures within 15 days from installation (cracks, bends, or impact damage not disclosed at shipping)
- Kingpin bore wear beyond what was documented at shipping
- Spring pad surface failures within 15 days from installation
- Steering arm mounting thread failures within 15 days from installation
- Brake mounting bracket failures within 15 days from installation
- Incorrect axle beam length or configuration shipped due to an error on our end
What Is Not Covered
- Damage caused during installation
- Damage from overloading beyond 12,000 lb GAWR (Gross Axle Weight Rating)
- Damage from incorrect mounting hardware torque (use Class 7-8 commercial truck torque specifications)
- Damage from incorrect alignment after installation (caster, camber, toe-in)
- Damage from off-road impact loading beyond design ratings (military and articulated dump truck applications have specific loading profiles)
- Damage from operating with worn or failing kingpin bushings or bearings (these are typically replaced during axle beam rebuild)
- External components (kingpins, kingpin bushings, kingpin bearings, steering knuckles, tie rod ends, drag link, brake drums / discs, brake hardware, wheel bearings, hubs, brake actuators) unless itemized
- Labor expenses of any kind
To start a warranty claim, reach us within 15 days of delivery at (855) 634-4447.
- Donor Truck Documented: Commercial, off-road, military, or vocational application confirmed
- Axle Beam Length Documented: 60 to 80 inch range, specific length confirmed
- Kingpin Bore Condition Assessed: Wear and roundness verified
- Spring Pad Surfaces Inspected: No cracks, deformation, or pitting
- Structural Integrity Confirmed: No bent beams or crack indications
- 15 Day Replacement Cover: Internal defects protected from delivery onward
Additional information
| axle-type | Front beam axle (steer axle) |
|---|---|
| capacity-rating | 12, 000 pounds |
| position | Front |
| construction-material | Forged steel |
| axle-beam-length | 60 to 80 inches |
| height | 8 to 12 inches |
| load-capacity-configuration-range | 12, 000 to 20, 000 pounds |
| safety-standards | Meets or exceeds DOT and FMVSS industry safety standards |
| width | 6 to 10 inches |
| weight | 500 to 1, 500 pounds (varies by beam length and configuration) |
| manufacturer | Eaton Corporation |
| compatibility | 1994 EATON 12F4 Axle Beam (Front) |
| price | $759.00 |
| Brand | Eaton |
Heavy-duty 12,000 lb rated forged steel front steer axle beam for Class 7-8 commercial trucks. The 12F4 designation indicates 12,000 lb GAWR (Gross Axle Weight Rating) Front axle, F4 case design generation. Forged steel construction provides superior strength and durability for commercial trucking, off-road equipment, military tactical vehicles, and specialized vocational applications. Integrates with leaf spring or air-ride suspensions, includes kingpin interface for steering knuckles, spring pads for suspension mounting, and steering arm mounting holes.
Class 7-8 commercial trucks, off-road equipment, military vehicles, and vocational trucks. Commercial Class 7-8: Freightliner FLD120 / Cascadia / Columbia / Century, International 9400 / LT / ProStar, Kenworth T800, Volvo VNL, Mack RD600 / R-Series, Western Star 4900 / 5700, Peterbilt 357 / 365 / 389 vocational. Off-road: Caterpillar 740 articulated dump truck, Komatsu HD785, Terex TA300, Bell B40D. Military: Oshkosh HEMTT, BAE RG-33 MRAP, AM General HMMWV, Navistar MaxxPro MRAP, Oshkosh M-ATV and M-1078. Vocational: concrete mixers, utility service trucks, fire trucks, ambulances, agricultural haulers.
Different product types: 12F4 is a beam, Dana 70 is a complete axle assembly. The Eaton 12F4 (this listing) is a forged steel axle BEAM, the structural component that mounts to the chassis suspension and provides the kingpin interfaces and brake mounting. The 12F4 does NOT include the kingpins, steering knuckles, axle shafts, ring and pinion gear set, or wheel hubs; those are separate components added during axle assembly. The Dana 70 Front Axle (our listing) is a COMPLETE axle assembly with housing, ring and pinion gears, axle shafts, kingpins, steering knuckles, and full driveline geometry, typically used for 4x4 military and heavy-duty pickup applications where the front axle is also a drive axle. Two different products serving different roles.
Vertical bore in the axle beam that accepts the kingpin for steering knuckle articulation. The kingpin is the vertical pin around which the steering knuckle rotates to steer the wheels. The kingpin bore in the axle beam must maintain precise dimensions and surface finish to support the kingpin bushings and provide smooth, low-friction steering articulation. Kingpin bore wear is a critical inspection point on used axle beams; excessive wear or out-of-round conditions cause steering wander, uneven tire wear, and require axle beam rework or replacement. We measure kingpin bore on every 12F4 we ship and document wear and roundness.
60 to 80 inch range, varies by truck width and application. Class 7-8 commercial trucks have varying axle widths depending on chassis design and intended application. The 12F4 axle beam is produced in multiple lengths from approximately 60 inches (narrow chassis) to 80 inches (wide chassis or specialty applications). When ordering, confirm your destination chassis to match the correct axle beam length; an incorrect length means the steering geometry, brake mounting, and wheel position will not align with your chassis.
Multiple spacing options matching leaf spring or air-ride suspension chassis. The spring pads on the 12F4 axle beam are the flat surfaces where the suspension components (leaf springs, air-ride links, U-bolts) clamp to the axle beam. Spring pad spacing varies by chassis OEM and suspension type: typical leaf spring spacings range from 33 to 38 inch center-to-center; air-ride suspensions use different mounting configurations. Spring pad surface condition is critical, cracks, pitting, or deformation can cause U-bolt loosening and suspension failure. We inspect spring pad surfaces on every 12F4 we ship.
Visual, dimensional, and structural inspection. Each 12F4 axle beam undergoes: visual inspection for cracks, deformation, or impact damage; magnetic particle testing of critical stress areas (when applicable); kingpin bore measurement for wear and roundness; spring pad surface inspection; steering arm mounting hole inspection for thread damage or cracks; brake mounting bracket condition verification; overall structural integrity verification (no bent beams, no crack indications); surface condition assessment (rust, paint, coating integrity). Results documented before payment.
No. There is no core return required.
2 reviews for 1994 Eaton 12F4 Front Axle Beam for Sale | OEM Used Heavy-Duty 12,000 lb Rated
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Hyacinth M. –
Got an Eaton 12F4 front axle beam for a 1996 Freightliner FLD120 with leaf spring front suspension restoration. Donor truck correctly identified as Class 7-8 commercial application, axle beam length documented at 73 inches (matching destination chassis width), kingpin bore condition assessed (within service tolerance), spring pad surfaces inspected clean, steering arm mounting holes verified, structural integrity confirmed (no bent beams or crack indications). Honest pre-purchase information about the heavy-duty front axle family context (Eaton 12F4 commercial Class 7-8 beam vs Dana 70 Front Axle per vaz148 complete military / heavy-duty 4×4 truck axle assembly, two different product types).
Cassius J. –
Sourced an Eaton 12F4 for a vocational concrete mixer truck rebuild. Donor application correctly identified as specialized vocational (concrete mixer equivalent), axle beam length and configuration documented for the destination chassis, kingpin bore measured within service tolerance, brake mounting pad configuration confirmed. Honest pre-purchase information about the 12,000 lb GAWR rating (NOT to be exceeded for proper service life) and the spring pad surface importance for U-bolt clamping security.