32
Maintenance
Troubleshooting
These troubleshooting procedures cover pump malfunctions, delivery problems and charge system malfunction.
Warning: Before attempting any repairs or maintenance, make sure machine is shut off.
PROBLEM
POSSIBLE CAUSE
REPAIR
ENGINE WILL
NOT START
Low oil level
Fill to proper levels.
Low water level in 200 gallon tank
Fill to 1/2 full minimum.
No fuel
Fill fuel tank.
LOW PRESSURE
Worn or oversized nozzle
Replace worn nozzle. Check nozzle size.
Clogged water supply hose, inlet
strainer, or kinked hose
Clean or replace strainers.
Worn or damaged piston cups
Replace piston cups.
Worn or damaged inlet or discharge
valve
Replace worn valve poppets or valve springs.
Dirt or foreign particles in valve
assembly
Remove any dirt particles.
Air leak in inlet plumbing or inaccurate
gauge
Locate air leak. Re-seal connection
or replace damaged gauge.
Cavitation
Check suction lines on inlet of pump for
restrictions.
Unloader
Check for proper operation
Worn or plugged relief valve on pump
Clean, reset and replace worn parts.
Worn or damaged hose
Repair/replace hose.
Broken valve spring
Replace spring.
Pulse valve on
Turn off pulse valve.
Improper adjustment of unloader
Adjust as necessary.
ROUGH OPERATION
WITH LOSS OF
PRESSURE
Restricted inlet plumbing or air leak in
inlet plumbing
Replace clogged inlet fittings. Check supply
hose and ensure adequate water supply.
Damaged piston, cup or pump valve
Replace any damaged pump parts
and clean out any foreign particles.
Clogged nozzles
Clean or replace nozzles.
WATER LEAKAGE
AT INTAKE
MANIFOLD OR
CRANKCASE
Worn manifold seals, pistons or O-
rings. Or, condensation inside
crankcase
Replace seals, sleeves or O-rings. Change oil
at regular intervals.
Inadequate water supply to pump
creating a vacuum lock
Ensure adequate tap water supply. Clear inlet
filter.
SHORT PISTON
CUP LIFE
Scored cylinders from pumping acids
Replace cylinders. DO NOT PUMP ACID
SOLUTIONS. For acid application, ask your
dealer for a pump saver injector.
Abrasive particles in fluid being
pumped
Replace water and detergent strainers if
damaged or missing. Install additional filter if
fine abrasives are still evident.
Operator(s) running pump without
water supply
DO NOT ALLOW WASHER TO RUN
WITHOUT PROPER WATER SUPPLY.
Hot water in pump
Do not run in bypass for more than
5 minutes. Do not let water supply exceed
140°F (60°C).
Landa ECOS 7000 Operator’s Manual 9.801-316.0 - E
