OPERATION
52 © HAMM AG 2009
2.2.9 Water irrigation
The pressure irrigation ensures a reliable
moistening of the drums during blacktop works
and thus prevents bituminous materials from
adhering to the drums. An electric water pump
supplies the irrigation system with water so
that the water consumption can be optimally
adjusted to the deployment conditions using
the installed automatic irrigation system. A
multilevel automatic interval system deter-
mines the minimum use of water for optimum
drum moisturing, using a combination of spray
quantity and pump pause time. The water
pump can also be switched manually to contin-
uous operation at any time. The water irrigation
control is switched off at a road speed of less
than 0.5 km/h (0.31 mph). A high-volume, rust-
proof water filter, arranged upstream the water
pump, prevents a premature contamination of
pump, lines and spraying nozzles, thus ensur-
ing a trouble-free operation. The filter mainte-
nance depends on the purity of the water used.
The automatic water irrigation system is
switched on with pushbutton (317), for which
the illuminated indicator (232) shows the cur-
rent irrigation level. As long as the pushbutton
is pressed, the pump runs in continuous opera-
tion. The pushbuttons (373) allow to increase
(+) or decrease (-) water consumption. The illu-
minated indicator (207) indicates that the water
pump is supplying.
Spray nozzle check when engine is at a
standstill
The following preconditions must be met for a
functional check of the spray nozzles during
machine standstill:
• EMERGENCY STOP switch
(NOT-STOP) (302)........................PRESS
• Parking brake (304) ...................APPLIED
• Engine stopped
• Electrical system (310).........................ON
• Driving lever (501) max.......to the FRONT
• Pushbutton (317) .................................ON
If these preconditions are met, the water pump
runs in interval operation with the selected irri-
gation level.
When the machine is at a standstill, the in-
terval irrigation system is without function.
15000-10
302 310
504 503
501
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