Kärcher 1.575-505.0, Operator'S Manual

Page: 21 / 50

21
Maintenance
Troubleshooting
PROBLEM POSSIBLE CAUSE SOLUTION
LOW
OPERATING
PRESSURE
Faulty pressure gauge Install new gauge.
Insufficient water supply
Use larger garden hose; clean filter washer at water
inlet.
Old, worn or incorrect spray
nozzle Match nozzle number to machine and/or replace with
new nozzle.
Plumbing or hose leak
Check plumbing system for leaks. Retape leaks with
teflon tape.
Faulty or mis-adjusted unloader valve
(where applicable) Adjust unloader for proper pressure. Install repair kit
when needed.
Worn packing in pump Install new packing kit.
Fouled or dirty inlet or discharge
valves in pump
Clean inlet or discharge valves.
Worn inlet or discharge valves Replace with valve kit.
DETERGENT
NOT
DRAWING
Air leak Tighten all clamps. Check detergent lines for holes.
Valve in the injector head may
be blocked, dirty or damaged
Clean or replace valve in injector.
Filler screen on detergent suction
hose plugged
Clean or replace.
Dried up detergent plugging
metering valve
Disassemble and clean thoroughly.
High viscosity of detergent Dilute detergent to specifications.
Hole in detergent line(s) Repair hole.
Low detergent level Add detergent if needed.
Discharge water temperature above
180°F
Lower discharge water temperature.
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON INSTALLATION
Pump sucking air Check water supply and possibility of air seepage.
Valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
Nozzle incorrectly sized
Check and replace if necessary
(See serial plate for proper size).
Worn piston packing Check and replace in necessary.
FLUCTUATING
PRESSURE
Valves worn Check and replace if necessary.
Blockage in valve Check and replace if necessary.
Pump sucking air
Check water supply and air seepage
at joints in suction line.
Worn piston packing Check and replace if necessary.
PUMP
NOISY
Air in suction line Check water supply and connections on suction line.
Broken or weak inlet or discharge
valve springs
Check and replace if necessary.
Excessive matter in valves Check and clean if necessary.
Worn bearings Check and replace if necessary.
Karcher HDS 505, 508, 509, 510 Operator’s Manual 9.800-078.0 - R