889
Model Code Page
51. Brake system
1. 8. 1998
6000--8750 511 5
C. Compressor
Picture 1 Compressor of pressure air brakes
1. Compressor draws air from the engine air intake system
2. Compressor
3. Pressure air into pressure regulator
4. Tension pulley
5. Compressor requires extra belt pull ey (+hub piece)
6. Lubricating oil from engine
7. Return oil into engine
8. Preessure plates
9. Suction plate
Compressor Knorr LK13...................
Displacement 110 cm
3
..................
Output (2300 r/min, with 7 bar
counter pressure) 220 l /min..............
Po wer co nsumption (2300 r/min, 7 bar)...1,8kW
Lubrication Engine lub. circuit....................
Cooling air cooling.......................
Note! On the six---cylinder engines the compressor is fitted
on the R H s i d e of th e e n g i n e . On 3 --- a nd 4 --- cy l in de r e n g i -
nes (without air conditioning/electric stop) the compressor
is fitted on the LH side of the engine.
If the tractor is retrofitted with the air conditioning/electric
stop, the compressor is fitted on the RH side of the engine.
In fitted with pressure air+air conditioning the compressor
is driven by two belts.
D. Pressure regulator
Airfromcompressorflowsinthroughport 1.Airflowsthen
via strainer 2, op e n s on e --- w a y v al v e 3, and flows through
port 4 into reservoir..
As soon as pressure in the reservoir is greater than spring
force 11 (ca. 8 bar), memphrane 5 distorts and piston 6
moves upwards. At the same time rubber collar round the
piston closes port in the piston and opens a passage to the
upper part of piston 7.
Pressure moves piston 7 downwards against spring 9,and
airfromcompressortoport 1 blows off via port 8 to
atmosphere.
Note! It is possible to adjust the working pressure with the
adjusting screw of spring 11. When the screw is turned
outwards, working pressure lowers and vice versa.
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