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Air compressor / General system
Troubleshooting flowchart, air compressor
B
Faults
05.11.2001
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a
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Capitel
Docu-No.
Index
Date
Version
Page
Troubleshooting flowchart, air compressor
Trailer does not brake (single-line brake system) (optional extra)
Trailer does not brake (single-line
brake system)
I
Check pressure at coupling head
(black) (approx. 5.0 - 5.5 bar).
No
Check tractor brake system
Yes
Chapter 8800 Reg. C - Air com-
pressor plan
I
Pressure drop when braking
(pressure drop in trailer control
line to 0 bar)
Check pressure drop with foot-
brake and handbrake
Pressure drop not OK
Check tractor brake system
I
Chapter 8800 Reg. C - Air com-
pressor plan
Pressure drop OK
I
Check pressure at trailer brake
cylinder and in air tank.
Pressure not OK
Check trailer brake valve, propor-
tioning valve, lines and hoses. Fit
new items if necessary
Bear proportioning valve setting
in mind!
Guidelines: empty approx.
1.5 bar; half load approx. 3.0 bar;
full load > 4.5 bar
I
Pressure OK
I
Check mechanical wheel brakes
and brake pads, set trailer brake
cylinders