Data sheet for checking compressed-air system of spring brake, form

Branch/Agency - Firm no. Customer

Vehicle ident no. Repair order no.

Tester: Name Date

License plate no. Original registration date Model Engine no. Odometer reading: km/miles

B65: Standard  Retrofitting 

(delete as appropriate)

Operating voltage in V:

 When filling the system for the first time between 0 and 12 bar operating pressure the indicator lamps must go out in the following sequence.

1. Release control, red (P)

2. Readiness indicator lamp, red (!)

3. Ancillary consumer, yellow

 If this sequence is not adhered to (e.g. 1., 3., 2.), the overflow valve should be adjusted.

Check

Target

Actual

Remarks

Leaktighness of the system as per Art. 29 d. German licensing regulations (StVZO) at 3 bar pressure reduction after 1 min

Max. 5%

Overflow valve setting

9.6 bar (- 0.3 bar)

Filling time 0 to 12 bar

3 to 6 min

Filling time 10.5 to 12 bar

1.0 min (+ 0.5 min)

Symbol lamps:

Color red

Parking brake off (P),
pressure switch B5

5.8 bar ( 0.3 bar)

Readiness (!) off (in 2.5 to 3 min), pressure switch B14

8.4 bar ( 0.4 bar)

Symbol lamps:

Color - yellow (also red in older vehicles)

Supply pressure of air reservoir V2 off, pressure switch B12

5.8 bar ( 0.3 bar)

Air compressor on, pressure switch B75

10.5 bar ( 0.5 bar)

Air compressor off, pressure switch B74

12 bar ( 0.5 bar)

Opening pressure of safety valve

13.8 bar (+ 1.2 bar)

Opening time of air drier
regeneration valve

approx. 4 seconds