4. .
1.Where is the gearbox situated?
2.What is the function of the gearbox?
3.What speeds does the gearbox provide?
4.What types of gearboxes do you know?
5.Why is the clutch shaft mouned in direct line with the gearbox shaft?
5. .
1.The principal function a).sliding-mesh type, constant
of the gearbox is.... mesh type and planetary type
2.The gearbox provides.... b). the simplest one and histori-
cally oldest
3.Gearbox can be.... c).to vary the speed of the car
4.The sliding-mesh gearbox is d). four forward speeds and one
reverse
5.The constant-mesh gearbox e). the most widely used.
is....
6. .
1. .
2. .
3. : , .
4. .
5. .
6. .
7. , .
Gearboxes are assembled and disassembled on special stands using special mechanisms. In case of trouble in change-speed gearbox it can be repaired only in the workshop. But in order not to get into trouble you should do the followings steps:
a).check the oil level in the gearbox casing;
b).wash the breather channel;
c).change the oil in accordance with the lubrication schedule;
d).wash the gearbox with a thin mineral oil;
e).drain the used oil through the drain hole.
8. .
DIALOGUE
Mike: Peter, do you remember what our teacher told us last time?
What do you know about gearboxes?
Peter: I know that the gearbox is used to change the speed of the car.
M.: And how many speeds does the gearbox provide?
P.: It can provide four forward speeds and one reverse.
M.: Into what types are the gearboxes divided according to their arrangements?
P.: They are divided into sliding-mesh type, constant-mesh type
and epicyclic type.
M.: What type is the simplest?
P.: The sliding-mesh one.
M.: Thank you very much for you help.
P.: You are welcome. Glad to help you.
Assemble
Axis -
Axle
Breather channel
constant-mesh gearbox
Disassemble -
Drain hole -
epicyclic (planetary) gearbox ()
Forward speed
Gearbox
gearbox casing
Gearing -
Get into trouble
Lubrication -
Oil level
Repair
