What is VIS-Check?

It is a diagnostic machine that checks the brakes, steering and suspension of heavy trucks, then produces a Safety and Efficiency Report to guide maintenance activities. 

Why focus on undercarriage diagnostics?

The undercarriage of a vehicle is where the weight of a vehicle meets the road. 

Safety, fuel economy and tire life are all compromised if undercarriage components are not in top working condition.  

Why use a machine to perform undercarriage diagnostics?

The VIS-Check machine makes performing undercarriage diagnostics:

• Safer by reducing manual labor

• Faster by automating brake testing

• Traceable by producing an inspection report

• More accurate by improving inspection methods

How does it work?

VIS-Check is comprised of two diagnostic devices; a performance based brake tester (PBBT) and a dynamic road simulator.

The PBBT measures the effectiveness of vehicle brakes by measuring the brake force produced by the truck through a complete braking cycle (apply, hold and release).

The road simulator helps technicians inspect the steering and suspension of a truck by dynamically loading these linkages consistent harsh over-the-road operation. 

What type of report does the brake test produce?

The brake test produces a report that indicates the following for each wheel end:

• weight

• peak brake force

• compliance to DOT requirements

• left to right brake force balance

• rolling resistance with no braking

From this information the following can be identified:

• glazed or contaminated linings

• incorrect brake adjustment

• air distribution problems

• faulty slack adjusters

• drum out of round

• weak brake force 

What type of report does the road simulator produce?

The road simulator produces an inspection report that identifies otherwise undetectable steering and suspension issues.  These might include:

• worn tire rod ends and king pins

• spring pin, shackle & hanger issues

• loose cab or exhaust mounts

• defective shock absorbers

• loose wheel bearings

• broken springs

• worn bushings

For each undercarriage Condition identified by VIS-Check:

• an operating efficiency down-the-road Effect is provided

• a recommended maintenance Solution is provided 

Is VIS-Check difficult to operate?

Not at all.  Technicians require less than an hour of training to operate VIS-Check 

What types of businesses operate VIS-Check?

Repair Shops     – to improve the quality of service they provide.

Fleets               – to improve the safety and efficiency of their vehicles.

Inspectors         – to ensure vehicle compliance with DOT regulations