Kärcher HD 1090, Руководство по обслуживанию

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13
Unit function
Handgun with pressure control and flow control (Servopress) with
low-effort version
1 Spray lance connection
2 High-pressure hose connection
3 Trigger
4 Retention force lever
5 Trigger play
6 Retention force spring
7 Handgun grip covers
8 Trigger position stop lever
9 Stop position in handgun grip
10 Adjusting wheel
11 Bolt
12 O-ring/support ring
13 Spindle
14 Trigger adjusting plate
15 Retaining screw for adjusting plate
16 O-ring/support ring
17 Threaded housing
18 Spring
19 Valve piston
20 Valve seat
With this type of handgun it is possible to control
the pressure and flow rate continuously, depen-
ding on how far the trigger (3) has been depres-
sed.
The distance that the trigger (3) can move is
limited by an adjustable stop lever (8) which can
be moved upwards or downwards by turning the
adjusting wheel (10).
The retention force lever (4) and spring (6) redu-
ce the retention force when the handgun is fully
opened.
When the trigger (3) is depressed, the valve
piston (19) is away from the valve seat (20) and
against the pressure of the spring (18) by the
spindle (13). This causes a gap to open up
between the valve piston (19) and the valve seat
(20). The further the valve is opened, the more
water can flow through.
The distance (5) by which the trigger (3) can be
moved is determined by the position of the trigger
adjusting plate (14).
If the adjusting wheel (10) is set to “0”, the trigger
(3) is locked in the closed position.
Markings on adjusting wheel
21
22
23
21 Handgun closed
22 Handgun partially opened
23 Handgun fully opened