Basic Settings; Checking The Pump Delivery; Checking The Relief Valve Opening Pressure; Adjusting The Relief Valve - Kärcher HD 1050 Service Handbook

HD 1050

Basic settings

B. Basic settings

1. Checking the pump delivery

Fit the shut off valve (special tool) to the high
pressure outlet, connect the high pressure hose
(without hand gun and spray lance).
Start the cleaner.
Close the shutoff valve as far as necessary to
bring the cleaner up to working pressure (see
technical data) and measure the quantity of
water delivered into a suitable container in litres
per minute.
2. Checking the relief valve opening
pressure
Connect the standard equipment to the cleaner
(Servopress hand gun, spray lance, nozzle and
hose).
Start the cleaner
Set the Servopress hand gun to Position 1
Read the pressure on the pressure gauge.
Required pressure: (see technical data)

3. Adjusting the relief valve

If the pressure is incorrect, it should be adjusted
to bring it to the required pressure.
Adjustment is best done when the cleaner is not
under pressure.
Loosen the lock nut.
Adjust by turning the adjusting nut. If need be,
hold the rod with a screwdriver.
To increase the pressure, turn the nut clockwise
(increase the spring pressure). To reduce the
pressure, turn the nut counterclockwise (reduce
the spring pressure).
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