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HSQ2400 Electromagnetic Retarder
Operation and maintenance
1.HSQ series rearder have five shifts:
0 shift | NO effect in reducing the speed |
1 shift | The speed will be reduced by 25% |
2 shift | The speed will be reduced by 50% |
3 shift | The speed will be reduced by 75% |
4 shift | The speed is to be reduced to 100% |
The lighted lamp on the instrument the speed panel indicates that the retarder is working in service,
when there is no need for the service of retarder, the gear may reverse to 0 position, then the lamp is
not light at this moment.
2. It is recommended that the retarder and the brake system be used comprehensively so as to prolong
the service life of tires and brake system.
3. The ratarder is to be checked and cleaned once after it has covered 5000km(cooled first). The dust on the Surface of rotator can be removed with high pressure cleaner, the stator(especially for the stator wiring post)may be washed with low pressure cleaner.

Briefs of the structure
HSQ series of speed reducer mainly contains following parts:
1) interface bracket
2) rotor
3) stator
4) coil
5) mid joint flange
The interface bracket (part1) is to be cast precisely and mounted on the chassis or car body. The rotor (part2)
which are divided into two parts (front and back) are to be cast with light and fine ferrous magnetic materials
containing good magnetic conductivity and it is specially made into a form of blade wheel in order to dispel the
heat caused by braking.
The two rotors are mounted on two sides of the stator in symmetry through the mid joint flange (part 5),
keeping with an appropriate gap (adjusted by spacer). The stator (part 3) is a stamping workpiece made of
light and high strength material that is magnetic-proof. Around the outside circle of the stator are mounted four sets of magnetic coils with unlike poles,
which are wounded on 8 magnetic cores with high magnetic conductivity.
The coils (part 4) are to be winded with wires containing characters of high heat resistance and high electric
conductivity and be divided into four groups (each group has two) with unlike poles. The mid joint flange
(part 5), which is made of fine material by precise machine, is to be connected with the driving shaft of the
automobile.

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