Landa ECOS 7000 Operator's Manual page 21

PRESSURE WASHER TROUBLESHOOTING
PROBLEM
WASHER FAILS TO
DRAW DETERGENT
DETERGENT
SOLUTION
TOO WEAK
DETERGENT
SOLUTION TOO
CONCENTRATED
DETERGENT IN
RINSE CYCLE
DILUTION OF
DETERGENT
CONCENTRATE
DURING CYCLE
NOISY OPERATION
PUMP NOISY
IRREGULAR
SPRAY PATTERN
EXCESSIVE WEAR
HIGH CRANKCASE
TEMPERATURE
OIL LEAKS
|
POSSIBLE CAUSE
Detergent metering valve closed
or valve clogged or defective
Back pressure in hose (when using
additional lengths of pressure hose)
Back pressure in pressure hose (when
using dual lance wand)
Suction tube not below liquid surface
Clogged or damaged suction strainer
Clogged detergent strainer
Air leak in detergent suction tube or inlet
plumbing
Original detergent too concentrated
Dual lance wand or adjustable nozzle
holder in open position or chemical me-
tering valve open
Worn or defective internal check valve
Defective check valve in detergent tank
Worn bearings
Cavitation
Low oil level
Worn or dirty valves
Bad bearings
Worn or partially clogged nozzle
Worn or loose bearings
Wrong grade of oil
Improper amount of oil in crankcase
Worn pistons and/or leaking crank seals,
crankcase cover seal or drain plugs
9.801-316.0 • Landa ECOS 7000 Operator Manual • Rev. 12/12
REPAIR
Open detergent metering valve, follow-
ing procedure in operating instructions.
Contact dealer for proper injector
size when adding lengths of hose.
Use proper size flood nozzle in dual
lance wand (refer to parts breakdown).
Completely submerge suction tube and
strainer in detergent solution.
Clean or replace strainer.
Clean or replace strainer.
Find air leak and clean or
replace parts as necessary.
Dilute product as necessary to achieve
proper concentration.
Close dual lance wand adjustable lance
holder to achieve high pressure. Close
detergent metering valve.
Repair or replace check valve or
injector parts as necessary.
Replace parts as necessary.
Replace bearings, refill crankcase oil
with recommended lubricant.
Check inlet lines for restrictions
and/or proper sizing.
Add oil
Replace or clean.
Inspect bearings; replace as required
Clean or replace nozzles.
Replace bearings. Check bearing
seals, spacers and retainers. Replace
any worn parts.
USE SAE 90 Gear Oil.
Adjust oil level to proper amount.
Replace seals, sleeves or O-Rings.
21