Kärcher HD 7/16-4 ST, Manual

Page: 23 / 156

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6
Maintenance schedule
Time Activity Assembly affected Performance of whom
daily Check hand-
spray gun Hand spray gun Check whether the hand-spray gun closes tightly
without any leaks. Check the protection mechanism
against accidental switching. Replace defective
hand-spray guns. Operator
opinion Power cord
(Only with appliance versions
with power cable and mains
plug). Check the mains cable regularly for damage such
as aging or formation of cracks. If you find a dam-
age, then the cable must be replaced before using
it any further. Operator/
Customer
Service
Test fill level Detergent tank, Installation
water softener (optional) Check filling level, refill if necessary. Operator
Check high
pressure hoses Outlets, hoses towards work-
ing machine Check hoses to see if there are damages. Replace
defect hoses immediately. Danger of accident! Operator
weekly or after
40 operating
hours Check the unit
for leaks Entire plant Check pumps and pipes for leaks. Inform Customer
Service if there is oil loss or if there is a leakage of
more than 10 drops of water per minute. Operator/
Customer
Service
Check oil level Oil tank at the pump If the oil is milky, it needs to be replaced. It is rec-
ommended likewise in this case that the pump's oil
seal be changed (Customer Service). Operator/
Customer
Service
Check oil level Oil tank at the pump Check oil level of the pump. Refill oil if required (Or-
der no. 6.288-016) Operator
Clean filter Filter at the detergent suck
hose Clean filter at the detergent suck hose. Operator
Test vibration
dampener Vibration dampener If the vibration of the pump increases it indicates
that the pressure tank is defective. Replace the vi-
bration dampener. Customer
Service
monthly or after
200 operating
hours Cleaning the
sieve Sieve in water inlet Check, dismantle sieve and clean it. Operator
Test swimmer
valve Float tank When the swimmer valve is closed no water can es-
cape the overflow. Operator
Test automatic
start Pressure switch Pump is at a standstill, because no water removal
has taken place. Turn on the hand spray gun. If the
pressure in the high pressure network falls below 3
MPa, the pump must be turned on. Operator
Tighten hose
clips All hose clips Tighten the hose clips using a torque wrench. Tight-
ening torque up to a diameter of 28 mm = 2Nm,
from 29 mm = 6 Nm. Operator
annually or af-
ter 1000 operat-
ing hours Oil change High-pressure pump Drain off oil. Refill oil. Check oil level in the oil tank. Operator
Check unit for
calcium depos-
its. entire water system Improper functioning of valves or pumps can be an
indication of calcium deposits. If necessary decalci-
fy. Operator
trained in
decalcifica-
tion
annual Safety check Entire plant Safety check according to the guidelines for fluid
spraying equipment. Technical
expert
23 EN