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TAK-4® Independent Suspension

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Safer. Smoother. Stops Sooner.

Overview

Proven, proprietary, severe-duty technology. Custom built for Pierce chassis. The TAK-4® Independent Suspension system maintains the feel of the road with outstanding steer-ability and a dramatically smoother ride over any surface. A tight steering system, torsion bar independent suspension, and high-performance braking maximize control. It makes a 12-ton fire apparatus feel like an SUV.

TAK-4 was originally engineered and developed by Pierce’s parent company, Oshkosh Corporation, for military and aircraft rescue vehicles facing off-road duty. TAK-4 deals just as effectively with more mundane road events like pot holes, railroad tracks, speed bumps and crowned intersections.

In 2001, Pierce changed the industry by introducing TAK-4 Independent Front Suspension (IFS), engineered specifically for Pierce vehicles. Pierce now offers TAK-4 Independent Rear Suspension (IRS) which applies the same military grade performance to the rear for supreme ride performance. For maximum mobility, Pierce also delivers TAK-4 T3, which combines the advantages of TAK-4 IRS with a 100% mechanical rear steering system.

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Specifications

 

  TAK-4 Independent Front Suspension (IFS) TAK-4 Independent Rear Suspension (IRS) TAK-4 T3 IRS with Tight Turning Technology
Custom Chassis Arrow XT, Dash CF, Enforcer, Impel, Quantum, Velocity Arrow XT, Dash CF, Enforcer, ImpelVelocity  Arrow XT, Dash CF, Enforcer, ImpelVelocity
Load Ratings 18,000 - 24,000 lb 24,000 - 52,000 lb 24,000 - 52,000 lb
Cramp Angle Up to 45° N/A Up to 9°
Wheel Travel

Up to 10"

Up to 10" Up to 10"
Dual Steering Gear Standard N/A Standard
Suspension Spring Type Torsion Bar Coil Coil 

 

Simplified Maintenance

The TAK-4 design not only maximizes a truck’s performance, it minimizes the wear and tear on your equipment and streamlines the maintenance process. There are no u-bolts on the front axle, no adjustments needed for the caster angle, and no need for lubricating the heavy-duty ball joints. Your rig spends less time in the shop and more time on the street.

Imperative Periodic Inspections
With a vast service network, Pierce provides you with trained certified technicians to perform routine maintenance and inspections that keep your vehicle running at its peak.
 

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Testing the Most Brutal Road Conditions

Pierce partnered with the Transportation Research Center of East Liberty, OH to subject TAK-4 to the roadway works – chatter bumps, staggered bumps, high-crown intersections, ruts, and potholes.

A 24,000-lb load was placed on the front axle to extreme-test the suspension, steering, and braking systems. To gauge endurance, the vehicle then performed 17,700 actual test miles.

Based on our testing, the TAK-4 IFS was proven to outperform any other suspension system in existence in the most grueling conditions.

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