Kärcher HDS4.0/22, Dealer'S Manual

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27
Maintenance
1. Attach a short section (3-5 ft.) of garden hose to
machine to siphon solution from an elevated
container, or add mixture to the float tank. Turn
pump switch on allowing solution to be pumped
through coils and back into the container. Solution
should be allowed to circulate 2-4 hours.
2. After circulating solution, flush entire system with
fresh water. Reinstall wand assembly to spray gun
Gas Valve Regulator Adjustment
Adjustment of the built-in regulator isn’t normally
necessary, since it is preset at the factory. However,
field adjustment may be accomplished as follows:
1. Attach manometer at pressure tap port.
2. Remove regulator adjustment screw cap.
3. With a small screwdriver, rotate the adjustment
screw clockwise to increase or counterclockwise to
decrease gas pressure.
4. Replace regulator adjustment screw cap (see
below).Pressure Relief Valve
Each machine is equipped with a relief valve to relieve
pressure in the system when higher than normal
operating pressures are encountered. If operating
pressure of machine is found to be normal and relief
valve continues to leak, repair or replace the valve.
CAUTION: Relief valve can become obstructed by
deposits and must be unscrewed at least once per
year to allow discharge.
Gas Valve Regulator Adjustment
On/Off
Switch
Inlet View
Outlet
Manifold Pressure
Adjustment Screw
Under Cap
Gas Valve
Regulator
Adjustment
Lines To
Pilot Light
Karcher Liberty HDS Stationary Dealer’s Manual 9.801-508.0 - AY