Front Suspension Systems Coiled bar of spring type

Front Suspension Systems

• Coiled bar of spring type steel • Absorbs road shock & carries vehicle weight • Linear- rate – equally spaced coils, have constant spring rating • Variable-rate – tapered, unequal spacing, act differently under various loads Coil Springs

Torsion Bars • Used in place of coil springs, usually 4 WD trucks • Bar twists, resisting movement of lower control arm

Ball Joints • Pivot points allowing steering knuckle movement • Reduced steering effort • Improved ride quality

Ball Joint Construction • Ball & Socket design • Ball seat is cushioned • Spring loaded

Load Carrying Ball Joints

Tension Loaded Ball Joint

Compression Loaded Ball Joint

Non-Load-Carrying Ball Joint

Stabilizer Bar

Strut Rod • Connected to frame & lower control arm • Controls fore & aft movement of control arm • May provide for caster adjustment

I-Beam Suspension • Solid axle connecting both front steering knuckles • Used on H. D. trucks

Twin I-Beam

Short & Long Arm Suspension • Provide for an independent suspension system • Camber & caster angles remain fairly constant over bumps • Arms connected to frame with rubber bushings

Upper Control Arm Design

Type 1 Design

Type 2 Design

S. A. L. A. Travel

Mac. Pherson Strut Suspension

Modified Strut Design

Double Wish Bone Design

Independent Front 4 WD

Solid Front 4 WD