Karcher HD 6000 C, HD 4000 C operating instructions Maintenance

HD 4000 C / HD 6000 C

E. Maintenance

English

Interval	Procedure	Subject Assembly	Activity	By whom
monthly, or	Check	Overflow valve	Dependent on the number of	Operator
after 200	overflow valve		high-pressure handguns used, the
operating			pressure reading fluctuates between
hrs.			the preset value and approx. 15 bar
			below the same. On closing all
			handguns, the gauge will read
			approx. 0 bar. In the event of
			malfunction, call customer service.	Customer
				service
	Check	Float switch in float	For about 5 seconds press down the	Trained
	low-water	reservoir	float of the low water protection	operator
	sensor		facility and check the fault indication	authorised
			on the printed circuit board. If	to open
			necessary remove any deposits.	control
				cabinet
	Clean	Dirt trap upstream of float	Switch OFF unit, turn OFF water,	Operator
	strainers	reservoir,	release pressure. Disassemble and
		Pressure controller	clean strainers.
	Check float	Float reservoir	Water level must stand 40 mm	Operator
	valve		below the overflow weir. With float
			valve closed, no water may exit. For
			adjustment information, refer to the
			Service Manual.
	Check	Pressure relief valve on	When functioning correctly, the	Operator
	pressure relief	pump	motor must reach full RPM within
	valve		2 seconds. If required, clean the
			strainer upstream of the pressure
			release valve. Prior to cleaning:
			Shut OFF water, set Emergency-
			STOP master switch to OFF.
	Check run-on	System control	Close utiliser (e.g. handgun).	Operator
	interval		After the after running time (approx.
			15 sec) the pump must switch off.
	Check	Pressure switch	The pump is stationary as no water	Operator
	automatic		is being drawn. Open the handgun.
	switching on		When the pressure in the
			high-pressure network drops below
			25 bar, the pump must switch on.
	Tighten hose	All hose clamps in/on the	Tighten hose clamps with torque	Operator
	clamps	unit	wrench.
			Torque:
			28 mm nominal diameter: 2 Nm
			29 mm nominal diameter: 6 Nm

5.956-648 A10369 (06/98) E4