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Maintenance and care, M danger, Maintenance schedule – Karcher HDS 12-14-4 ST Gas User Manual

Page 31: Time, Activity, Assembly affected, Performance, Of whom, Daily, Check hand- spray gun

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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 and care

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

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 with-
out the high pressure nozzle. If the operating
pressure on the manometer of the machine in-
creases to more than 3 MPa, then the plant
needs to be decalcified. The same is applicable
when an operating pressure of more than 0.7 - 1
MPa is detected 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

after 500 - 700 op-
erating hours

Replace

Electric igniter, ionisation elec-
trode

Replace electric igniter and/or the ionisation
electrode.

Customer
Service

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, check pressure
tanks, remove calcium deposits from the heating
coil, clean/ replace ionisation electrodes, adjust
burner.

Customer
Service

Replace the
hose

Hose to exhaust pushbutton
switch

Install new hose.

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
expert

31

EN