Telma

Question 1

Telma

The Telma Retarder is a device, which is attached to the ___ axle of the apparatus.

Answer 1

rear

Question 2

Telma

The drive shaft is cut, balanced and attached to two rotors that rest near the retarder with a very narrow clearance. Electromagnets with alternate polarities are located in the stator. As current flows through the stator coils, a magnetic field is created which passes through the rotors. The magnetic field creates eddy currents in the rotors, which oppose rotor rotation and slow the driveline.

Answer 2

reference

Question 3

Telma

The retarder may be used for descending grades, driving in city traffic and whenever vehicle retarding is required.

Answer 3

reference

Question 4

Telma

The Telma Retarder controls consist of the following:

Answer 4

An ON/OFF switch to activate or deactivate the system.

 A pressure manifold unit connected to the brake pedal.

 A low speed switch which deactivates the retarder when the vehicle speed is below 2 to 3 MPH.

 A five position handle on the steering column. (not 2000)

 A group of four lights, one for each stage activated.

**2000 does not have a 5 position hand control

Question 5

Telma

The following pressures applied to the brake pedal activates each position:

____ PSI – 25% effect

____ PSI – 50% effect

____ PSI – 75% effect

____ PSI – 100% effect

Answer 5

3

5

7

10

Question 6

Telma

The low speed switch deactivates the Retarder when the vehicle speed is below ___ to ___ MPH.

This is to prevent the retarder from staying on once the vehicle has come to a complete stop; thus preventing a large draw on the electric system.

Answer 6

2 to 3 mph

Question 7

Telma

It is advisable to combine the use of the Telma with that of the _____, in order to benefit from the braking effect of the engine.

Answer 7

transmission

Question 8

Telma deactivates when the ABS system is activated

Answer 8

reference

Question 9

Since the Telma Retarder operates by the use of electromagnets, there is an increased draw on the apparatus electrical system. Each stage of the Telma
draws approximately _______ amps.

Answer 9

50 – 60 amps

Question 10

When all four stages are activated, the Telma draws approximately ____ amps.

Answer 10

250 amps

Question 11

Telma

If the voltmeter drops below set standards, turn off the Telma toggle switch and consult the Shops.

Answer 11

reference

Question 12

Telma

High idle - Use this switch any time you feel that the electrical system is low. One example would be to turn on the switch once
you have arrived on scene of an incident. This will allow the charging system to replenish some of the capacity taken from the batteries.

Answer 12

reference

Question 13

Telma

High idle - 1000 RPMs

maxi brake set and transmission in neutral

Answer 13

reference

Question 14

Telma on year trucks

Answer 14

Some 1995, ALL 1996, ALL 2000, Some 2001

Question 15

Telma

Electromagnets with alternate polarities are located in the stator. As current flows through the stator coils, a magnetic field is created which passes through the rotors. The magnetic field creates eddy currents in the rotors, which oppose rotor rotation and slow the driveline.

Answer 15

reference

Question 16

Telma

On long downgrades, after stabilizing the vehicle at the desired speed, it is advisable to maintain the Telma on Position ___, this is done to obtain the best endurance.

Answer 16

2

2001 logbook only