Let's Go Aero LittleGiant Trailer LGT 1107 - T (Torsion based model) User Manual

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LGT1107rev0614

Rubber Torsion Axle Suspension

Except for periodic inspection of the fasteners used to attach the rubber torsion axle to the trailer frame and a visual

inspection of the welds, no other suspension maintenance is required. However, all maintenance regarding hubs, drums,

rotors, bearing, wheels, and tires, should be adhered to.

The torsion suspension system is a self-contained suspension

system that is housed entirely inside the axle beam. Unlike the

spring suspension system, the axle beam attaches directly to the

trailer frame without the need for various mounting components.

The action provided by the rubber torsion suspension system is

unique from the leaf spring suspension providing several operat-

ing advantages including independent suspension and a virtually

maintenance-free suspension system.

How the Rubber Torsion Suspension System Works
The rubber torsion axles provide a much improved trailer

ride relative to conventional spring axles through a unique

arrangement of the steel torsion bar surrounded by four nat-

ural rubber cords encased in the main structural member of

the axle beam. The wheel/hub spindle is attached to a lever,

called the torsion arm assembly. This assembly includes the

torsion arm, the torsion bar and spindle. As load is applied

to the trailer, the torsion arm assembly pivots around the tor-

sion bar, causing a rolling or compressive resistance in the

rubber cords inside of the axle beam. Both sides of the axle

are completely independent from one another.
Direction of Travel

The rubber torsion axle beams and stub axles must be

mounted with the torsion arm and spindle trailing to the

rear of the axle beam.

As Load is Applied to the Trailer, the Torsion

Arm Moves to Absorb the Shock

Wheels and Tires

Wheel Selection

Wheels are a critical component of your running gear system. When specifying or replacing your trailer wheels it is

important that the wheels, tires, and axle are properly matched. The following characteristics are extremely important

and should be thoroughly checked when replacement wheels are considered.
1. Bolt Circle. Many bolt circle dimensions are available and some vary by so little that it might be possible to attach

an improper wheel that does not match the hub. Be sure to match you wheel to the hub.

2. Capacity. Make sure that the wheels have enough load carrying capacity and pressure rating to match the maxi-

mum load of the tire and trailer.

3. Offset. This refers to the relationship of the centerline of the tire to the hub face of the axle. Care should be taken

to match any replacement wheel with the same offset wheel as originally equipped. Failure to match offset can

result in reducing the load carrying capacity of your axle.

Torque Requirements
It is extremely important to apply and maintain proper wheel mounting torque on your trailer axle. Torque wrenches

are the best method to ensure the proper amount of torque is being applied to a fastener.
It is important that the specified torque levels are maintained on the wheel nuts or bolts on your axle to prevent loose

wheels, broken wheel studs, and possible wheel separation from the axle.
Wheel nuts and bolts are offered in different cone angles (usually 60° or 90°). It is important to match the angle of the

fastener to the wheel on the axle.