HGV transmission general flashcard

Front

A rear wheel drive final drive assembly is noisy on vehicle overrun. Which ONE of the following is the most likely fault? worn half shaft bearings, broken half shaft, worn differential gears, crown wheel and pinion teeth worn

Back

crown wheel and pinion teeth worn

Front

When engaging gear there is noticeable clutch judder. ONE possible cause is:

Back

badly worn engine mountings

Front

A vehicle fitted with a range change manual gearbox has difficulty in engaging higher gears. What is the most likely cause? Options: Contaminated clutch linings, Broken clutch centre plate springs, Release bearing seized, Low air pressure

Back

Low air pressure

Front

The signal to the solenoid valves in a semi-automatic electronic transmission system is sent from the: throttle position sensor, speed sensor, ECU, pattern select switch

Back

ECU

Front

The function of the reverse idler in a transmission is to:

Back

Change the direction of rotation of the output shaft

Front

The function of an interlocking device in a transmission is to:

Back

Prevent selection of more than one gear at any one time

Front

Taper roller bearings, fitted in pairs, are able to sustain:

Back

Both radial and thrust loads

Front

The purpose of a power take-off on a HGV is to provide:

Back

Power to external accessories

Front

One purpose of the crownwheel and pinion, in a conventional rear-wheel drive vehicle, is to:

Back

Change the direction of drive through 90 degrees

Front

The transmission input shaft is disconnected from the engine when the:
Clutch pressure plate is moved towards the flywheel

Back

Clutch pressure plate is moved towards the flywheel