Troubleshooting Guide - Kärcher HD 9/100-4 Cage Advanced Bedienungsanleitung

 Check the high-pressure hose.
a The operating pressure rating of the hose must
match the operating pressure of the device. (The
operating pressure is specified on the hose screw
connection.)
b The connection threads of the hose and device
must match.
c The surface of the hose must be undamaged.
d The hose screw connections must be free of cor-
rosion, the sealing surfaces and threads must be
clean and undamaged.
e The O-rings must be present and undamaged.
f The hose should not be older than 6 years. (The
date of manufacture is specified on the hose
screw connection.)
Immediately replace a damaged high-pressure
hose.
 Check the high-pressure pump oil level at the oil lev-
el display.
Contact Customer Service immediately if the oil is
milky (water in the oil).
 Check the device for leaks.
Weekly
1. Check the filter insert.
2. Check the high-pressure pump for unusual noises.
3. Clean the device as necessary.
4. Check the age of the high-pressure hoses. Do not
use hoses that are more than 6 years old.
After the first 50 operating hours
1. Change the oil in the high-pressure pump.
2. Check the tightening torque of the screws on the
clamping carriage, target value 120 Nm.
Illustration H
Pump head screws
1
Motor screws
2
Clamping carriage screws
3
3. Check the tightening torque of the screws on the
motor, target value 86 Nm.
4. Check the tightening torque of the screws on the
pump head (see "Maintenance work").
Every 3 months
1. Check the device for damage.
2. Clean the engine air intake.
3. Pay attention to unusual vibrations.
4. Check that all screws are tight.
5. Check the condition of the electrical cable.
6. Check the motor seals.
Every 6 months
1. Check the high-pressure hoses.
a Inspect the surface of the hose for damage (abra-
sion points, cuts, cracks).
b Inspect the hose for deformations (layer separa-
tion, blisters, crushing, kinking).
c Inspect the hose screw connections for deforma-
tion and corrosion
d Check that the hose is tightly seated in the hose
screw connections.
Every 500 operating hours, at least annually
 Have the device serviced by Customer Service.
22
Maintenance work
WARNING
Risk of scalding
The oil in the high-pressure pump becomes very hot
and cause scalding if touched.
Do not unscrew the oil drain plug while the device is in
operation.
Allow the device to cool down before changing the oil.
Note
See the "Technical data" chapter for the oil volume and
type
1. Unscrew the oil drain plug.
Illustration I
Oil filler neck
1
Oil level gauge
2
Oil drain plug
3
2. Drain the oil into a suitable collection container.
3. Screw in the oil drain plug.
4. Unscrew the cap of the oil filler neck.
5. Slowly fill with new oil until the level is in the middle
of the oil level display.
The air bubbles must escape.
6. Screw on the cap of the oil filler neck.
Check the tightening torque of the pump screws
Description
Cylinder fastening
Pump head fastening
Illustration J
1. Check all screws for corrosion. Have corroded
screws replaced by the Customer Service depart-
ment.
2. Set the torque wrench to the value specified in the
table above.
3. Tighten the screws in the sequence 1...22 specified
above until the torque wrench clicks to indicate that
the correct torque has been reached.
On delivery, the filter is equipped with a filter fleece that
retains particles with sizes of 100 µm or larger.
A filter fleece that retains particles with sizes of 50 µm
or larger is required when using a rotary nozzle.
Filter fleece
100 µm
50 µm
1. Close the water inlet.
2. Unscrew the filter casing.
3. Replace the soiled filter fleece with a new filter
fleece.
4. Attach the filter casing.
5. Vent the device.

Troubleshooting guide

Have all checks and work on electrical parts performed
by an expert.
In case of any malfunctions not mentioned in this chap-
ter, contact the authorised Customer Service.
English
Changing oil
Number
1...18
19...22
Cleaning the filter
Order number
6.414-074.0
6.414-073.0
Tighten-
ing torque
40 Nm
35 Nm