Cleaning, maintenance and repairs
12.5.7.3 Checking the pressure in the compressed air tank of the dual-circuit pneumatic brak-
ing system (workshop)
1. Connect a pressure gauge to the test connection on the com-
pressed air reservoir.
2. Run the tractor engine (approx. 3 mins.) until the compressed air
reservoir has filled.
3. Check whether the pressure gauge displays the setpoint range
6.0 to 8.1 bar.
4. If the reading drops below or exceeds the setpoint range, have
the defective parts of the braking system replaced in a specialist
workshop.
12.5.7.4 Leak test of the dual-circuit pneumatic braking system (workshop)
•
Test all connections, pipe, hose and screw unions for seal-
tightness
•
Eliminate any abrasion points on pipes and hoses
•
Replace any porous and damaged hoses (specialist workshop)
•
The dual-circuit pneumatic braking system applies as being seal-
tight, if the pressure drop within 10 minutes with the engine shut
down is no greater than 0.10 bar, i.e. about 0.6 bar per hour.
•
If the values are not maintained, have the leakage sealed or the
defective components of the
•
braking system replaced at a specialist workshop.
12.5.7.5 Cleaning the line filter of the dual-circuit pneumatic braking system (workshop)
The dual-circuit pneumatic braking system is
equipped with two line filters (Fig. 212/1). Clean
both line filters as described above.
To clean the line filters
1. Press the two lugs (Fig. 212/2) together
and take out the closure piece complete
with O-ring, pressure spring and filter in-
sert.
2. Clean the filter insert with petrol or thinner
(wash it) and dry with compressed air.
3. When re-assembling in the reverse order,
ensure that the O-ring does not jam in the
guide slot.
Fig. 212
194
Cirrus BAH0049-1 09.14
