HENNESSY INDUSTRIES Coats 1185, Operation Instructions Manual

 Important: Always read and follow instructions. 

• 17

Balancing Set Up

Unit of unbalance measurement

It is possible to select whether to display the unbal-

ance values expressed in grams or ounces.

Unbalance display pitch

You can view the unbalances in steps of 1/4 oz or 0.1 

oz (5 grams or 1 gram).

Notes:

 For full use of the wheel balancer functions, 

it is ad visable to always set a display step of 1/ 4 oz 

(5 grams).

Tolerance

This is the unbalance threshold below which 0.00 

appears on the screen at the end of the spin.

Static always enabled

Enables/disables the simultaneous display of the 

selected correction plane and STATIC unbalance.

Run with guard closed

By selecting “ON”, the wheel balancer automatically 

starts to spin when the wheel guard is lowered.

Special Functions

Presetting the Customer and User Name

The machine can be customised by setting the name 

that appears on the screensaver.

Wheel Balancing Machine SELF TEST

An automatic self-diagnostic cycle is provided for 

easier trouble-shooting.

(Consult the extraordinary maintenance manual or 

contact Technical Service).

Diagnostics

Inconsistent Unbalance Readings

In some cases, when a wheel that has just been 

balanced is repositioned on the balancer, the machine 

can detect an unbalance.

This is not a machine problem but is due to faulty 

mounting of the wheel on the flange. In other words, 

when mounting the wheel after initial balancing, it has 

taken another position with respect to the balancer 

shaft axis.

If the wheel has been mounted on the flange with 

screws, the screws may not have been tightened 

correctly (crisscross sequence) or the tolerances of 

the holes drilled in the wheel may be too large. Small 

errors, up to 10 grams (0.4 oz), are to be consid-

ered normal in wheels locked with the relative cone: 

The error is normally greater for wheels locked with 

screws or studs.

If, after balancing, the wheel is still unbalanced when 

refitted on the vehicle, this could be due to an unbal-

anced brake drum or, very often, the tolerances of the 

holes drilled in the rim and drum are too large. In this 

case, balancing should be performed using a balancer 

with the wheel mounted on the vehicle.