Adjust Safety Valve - Kärcher HDS-E 8/16-4 M Series Service Manual

6.4 Adjust safety valve


Install the shut-off valve with thermometer and
manometer (special tool) on the high pressure
connection.
1 Rotary knob for pressure and volume regulation
2 Release opening

Rotate the rotating handle of the pressure regula-
tor on the pump clockwise (direction "+") all the
way to the stop.

Unlock the rotating handle using a screwdriver
and remove it from the pressure regulator.
1 Adjustment screw, high pressure
2 Lock nut, adjustment screw, high pressure

Loosen the locknut of the adjustment screw for
high pressure.

Screw in the high pressure adjustment screw all
the way. This blocks the overflow valve.

Turn on the appliance.
1 Safety valve
2 Adjustment screw

Slowly close the shut-off valve and watch the ma-
nometer to see at which pressure the water drips
from the outlet of the safety valve.
Target value: 18.5 MPa (185 bar)

If the pressure is too high, turn the adjustment
screw on the safety valve to the left (relax the pres-
sure spring).

If the pressure is too low, turn the adjustment
screw on the safety valve to the right (tension the
pressure spring).

Seal the adjustment screw.

Reset the pressure and volume regulation (see
"Adjusting the rotating knob on the pump")
English 5.906-548.0 Rev. 00 (04/12)
73