Telma Flashcards
(15 cards)
Where is the telma retarder attached to on the truck?
Rear drive axle
How many rotors are cut and balanced drive shaft attached to?
2 rotors that test near retarder with very narrow clearance
What is located in the stator?
Electromagnets with alternate polarities
What does the magnetic field create that oppose rotor rotation and slow the driveline?
Eddy currents
When may the telma retarder be used?
Descending grades
Driving in city traffic
Whenever vehicle retarding is required
At what mph does the telma deactivate?
Speed below 2-3 mph
Where is the pressure manifold unit connected to for the telma?
Brake pedal
How many positions for the telma retarder are found on a handle on steering column?
5 positions
A group of how many lights for each stage activated?
4 lights
What are the different pressures applied to the brake pedal for activation of the telma and what are their effects?
3 psi - 25%
5 psi - 50%
7 psi - 75%
10 psi - 100%
It is advisable to combine the use of what along with the telma in order to benefit from the braking effect of the engine?
Transmission
For each stage of the telma, the telma draws how many amps?
50-60 amps
When all 4 stages are activated, the telma draws how many amps?
250 amps
When driving long down grades, what position should the telma be in?
Position 2
Why does the telma deactivate between 2-3 mph?
To prevent retarder from a large electrical draw once vehicle has come to a complete stop
