Kärcher HDS 891 ST Notice D'instructions page 35

HDS 891 / 1291 ST
1. Maintenance Schedule
Frequency Action
Daily Check
handgun
Check
HP hoses
Weekly or Check oil
after 40 condition
operating
Check oil level Oil container on pump
hours
Clean strainer
Monthly or Clean and
after 200 check ignition
operating electrodes
hours
Check pump
Check for
internal
deposits
Clean strainer
5.959-742 A 2009651 (11/04)
D. Maintenance
Applicable assembly
Handgun
Output pipes,
hoses connected to working
tools
Oil container on pump
Strainer in water inlet
Ignition electrodes in the
cover of the continuous-flow
heater
High-pressure pump
Whole unit
Strainer in the water level
sensor
Procedure
Check whether the high-pressure
handgun closes without any
leakage. Test catch for securing
handgun against inadvertent
operation. Replace defective
handguns.
Inspect hoses for damage. Replace
defective hoses immediately.
Risk of accident!
If the oil is milky, it must be
replaced.
Check pump oil level. If required,
top up with oil (part no. 6.288-016).
See Section D.3 "Cleaning
The Strainer".
Unscrew the fuel line, remove the
electrode holder and clean the
electrodes. Check the electrode
setting according to the diagram
overleaf and, if required, adjust.
Check the pump for leaks. If there
are more than 3 drops per minute,
call customer service.
Switch on the unit with spray lance
without the HP nozzle. If the
operating pressure on the unit
pressure gauge exceeds 30 bar,
the unit must be descaled.
The same applies if an operating
pressure of more than 7–10 bars
is established during operation
without an HP line (water flows
freely out of the high-pressure
outlet).
See Section D.3 "Cleaning
The Strainer".
English
By whom
Operator
Operator
Operator
Operator
Operator
Operator
instructed
in
descaling
Operator
Operator
instructed
in
descaling
Operator
D1