Cleaning, maintenance and repairs
ZG-B
BAG0051.5 02.14
121
Air reservoir
Drain the air reservoir every day.
Fig. 90
Draining the air reservoir
Fig. 90/...
(1) Air reservoir
(2) Tensioning belts
(3) Drainage valve
(4) Test connection for pressure gauge
1. Pull the drain valve (Fig. 90/3) in a side-
ways direction using the ring until no more
water escapes from the air reservoir (Fig.
90/1).
→
Water flows out of the drain valve (Fig.
90/3).
2. Unscrew the drain valve (Fig. 90/3) from the
air reservoir and clean the reservoir if there
are signs of dirt.
Inspection instructions for the dual circuit service brake system
1. Leak tightness check
1. Check all connections, pipe lines, hose lines and screw connec-
tions for leak tightness.
2. Remedy any leaks.
3. Repair any areas of chafing on pipes and hoses.
4. Replace porous and defective hoses.
5. The dual-circuit service brake system may be considered leak-
proof if the drop in pressure is no more than 0.15 bar after 10
minutes.
6. Seal any leaking areas or replace leaking valves.
2. Checking the pressure in the air reservoir
Connect a pressure gauge to the test connection on the air reservoir.
Set value 6.0 to 8.1
+ 0.2
bar
3. Checking the brake cylinder pressure
Connect a pressure gauge to the test connection on the brake cylin-
der.
Set value: with brake not applied 0.0 bar
If an ALB regulator is installed, the values are checked in line with the
information on the Haldex ALB plate.
