物理 WU LI ─ WH-1030B(2
020.01V)
15
Problem
Cause
Solution
Pressure
adjustment
problem
◎
The pressure valve or the
pressure valve seat is
worn out, damaged or
blocked.
◎
The packings are worn
out.
◎
The valve assemblies are
worn out or blocked.
◎
The pressure decreases
due to nozzle wear.
◎
Air in the pump.
◎
The Unloading Valve
Assembly is damaged.
◎
Clean the pressure valve or
replace the worn out or damaged
spare parts.
◎
Replace the packings.
◎
Clean or replace the valve
assemblies.
◎
Replace the nozzle.
◎
Check the Suction Hose and
fittings; make sure they are well
connected and in good condition.
◎
Return the product to your local
dealer to repair or replace the
Unloading Valve Assembly.
Troubleshooting