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|64||Check attachments and electrical connections.|
|Clean outside by flushing with water.|
|Check control unit attachments and draining.|
|(Voith VHBK 130 L/130 F)|
|65||Check the control pressure. If necessary adjust the relief valve, opening pressure approx. 30 kPa above maximum control pressure.|
With the retarder cold, wash off any dirt on the outside with water at a pressure of 8-10 kgf/cm2. After washing, blow-dry with pressurized air.
Too much grease on the electrical retarder can often result in odours when the retarder heats up.
Note: When Supertelmaco no. 3 is used, the greasing interval can be extended to 40,000 km, provided that this grease is not mixed with any other type of grease.
|Drain hole, control unit|
The retarder can be tested driving on the road. Set the switch, in the pedal-controlled system, to the "on" position. Increase speed to about 70 km/h and depress the brake pedal approx. 9-12 mm (or move the hand control to the first step). Check/feel that braking has started.
Apply the retarder a step further and check that the braking increases. With the pedal-control system, the retarder reaches full application and the brake torque is approx. 1500 Nm. When the retarder is cold, the brake pedal will be depressed approx. 27-31 mm, which corresponds to a brake application of 20-50 kPa.
|Brake pedal positions with pedal-controlled retarder operation|
Like the electrical retarder, the hydraulic retarder can be tested driving on the road or on a vehicle dynamometer. A brake tester cannot be used.
Voith VHBK 130 L (C10M)
Max. braking torque at 120 kPa operating air pressure is 2200 Nm.
Voith VHBK 130 F (B10M chassis no. 20001-)
Max. braking torque at rear axle reduction ratio 3.10 and 3.56:1 is 3000 Nm at 180 kPa operating pressure. Other rear axle reduction ratios, max. 2400 Nm at 140 kPa operating air pressure.
Concerning checking and adjusting operating air pressure/relief valve, refer to Service Manuals, Sections 5(59) and 0(03).