Manual Karcher HDS 12-14-4 ST (page 30 of 524) (All languages)

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Care and maintenance

DANGER

Risk of injury! The main switch of the vacuum cleaner is to be switched off or the Cekon plug must be unplugged while carrying out

any repairs or maintenance jobs.

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 mecha-

nism against accidental switching. Replace de-

fective hand-spray guns.

Operator

Check high pres-

sure hoses

Outlets, hoses towards working

machine

Check hoses to see if there are damages. Re-

place defect hoses immediately. Danger of acci-

dent!

Operator

Check the con-

necting line with

mains plug

Electrical connection with plug/

socket

Check the connecting line with mains plug for

damages. If the power cord is damaged, please

arrange immediately for the exchange by an au-

thorized customer service or a skilled electrician.

Operator

weekly or after 40

operating hours

Check oil level Oil tank at the pump If the oil is milky, it needs to be replaced. Operator

Check oil level Oil tank at the pump Check oil level of the pump. Refill oil if required

(Order no. 6.288-016)

Operator

Cleaning the

sieve

Sieve in water inlet See section "Clean sieve". Operator

monthly or after

200 operating

hours

Clean and check

the ignition elec-

trodes

Ignition electrodes located in

the lid of the continuous heater

Unscrew the fuel pipe, dismantle the electrode

holder and clean the electrodes. Check the elec-

trode setting according to the diagram on the fol-

lowing page and make the necessary adjust-

ments.

Trained oper-

ator

Check pump High-pressure pump Check the pump for leaks. If the leakage is more

than 3 drops per minute, call Customer Service.

Operator

Check for inter-

nal deposits

Entire plant Operate the machine using the spray pipe without

the high pressure nozzle. If the operating pres-

sure on the manometer of the machine increases

to more than 3 MPa, then the plant needs to be

decalcified. The same is applicable when an op-

erating pressure of more than 0.7 - 1 MPa is de-

tected while operating the machine without high

pressure pipe (water comes out freely at the high

pressure outlet).

Operator

trained in de-

calcification

Cleaning the

sieve

Sieve in the water shortage

safeguard

See section "Clean sieve". Operator

half-yearly or after

1000 operating

hours

Oil change High-pressure pump Drain off oil. Fill in 1 l new oil (Order no. 6.288-

016). Check oil level in the oil tank.

Operator

check, clean Entire plant Visual inspection of the plant, check high pres-

sure connections to see that they are not leaking,

check that the over-flow valves are not leaking,

check high pressure hoses, pressure tanks,

clean/ replace fuel filters, remove the rust/ calci-

um deposits from the heating coil, clean/ replace

ignition electrodes, clean/ replace burner nozzle,

adjust burner.

Customer

Service

annual Safety check Entire plant Perform a safety inspection as per the applicable

national rules and regulations for liquid spray jets

of the respective country.

Technical ex-

pert

at least every 5

years, recurring

Pressure test Entire plant Perform the pressure test as per manufacturer's

instructions.

Technical ex-

pert

30 EN

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Karcher HDS 12-14-4 ST Manual

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