4
TROUBLE SHOOTING GUIDE
6.
4. Unscrew the cylinder.
5. Replace the seals and gaskets and the ring and assembly back doing this steps backwards again.
Instructions for disassembling diaphragm module system models 543195 SP02 - 542195 SP03:
1. Take the pin out from the lower axis of the pump handle and take out the nuts and bolts that hold the rocker arm assy.
2. If you want to check or change the checks, disconnect the hose and unbolt the module, change the checks making sure that the outside
clamp is aligned with the chamber piece. This is the right position for the module windows to match the exit of the chamber.
3. Put the rocker arm assy. back on the module and the plastic protection.
1 2 3 4
3
5
12
NOTE: We recommend to change the module when you have a problem.
PROBLEM CAUSE SOLUTION
The shut-off valve does not close after
releasing the trigger.
The plunger O-rings are worn out or swollen. Replace them and lubricate the plunger with the new
O-rings.
The shut-off valve does not function
when depressing the trigger.
The filter or nozzle are blocked. Take the filter out of the shut-off valve, clean or replace
it and clean the nozzle.
Moving the pump handle becomes
very difficult.
The internal part of the cylinder are dirty,so the
piston ring can not run smoothly, or the piston
ring grew because the material used to apply
is very aggressive.
Open the cylinder according to the method mentioned
in point 5.1 to check if its dirty and clean, compare the
piston ring to a new one to see if it grew, if it did
change immediately.
The tank collapses “it shrinks”. The cap gasket is not letting air through. Clean the gasket and lubricate, also clean the cap and
assembly again.
While working there is leakage between
the cap and the tank .
The cap gasket is not lubricated. Lubricate or replace according to the diagnosis.
While working there is some leakage
from the cylinder.
The cylinder can be worn out from the insider
or the piston rings damaged
Replace.
While working, the sprayer does not
generate pressure.
The gaskets are dirty, dry or blocked. Replace.
While pressuring the tank with the lever,
when you stop it goes up and stays there.
The gasket that is inside the cylinder is
blocked or stayed open.
Inspect the cylinder, clean, adjust and put back in
place.
While working, the pressure lasts very
little time.
The pressure chamber is filled with water
because the gaskets are not working.
Take the water out of the sprayer and replace the
gaskets.
The sprayer builds low or no pressure. Check valve in the pump have become stuck
and/or there is an air lock in the unit.
Release pressure by keeping flow control open and
pumping several times. Disassemble and force
seals open by hand if step one does not work.
Replace O-rings and seals, replace pressure
chamber if there is no improvement, lubricate
and reassemble.
The sprayer does not hold pressure or tank
leaks at pump connection.
The O-rings and check valve need replacing,
the pressure chamber has expanded or the
check valves are clogged with debris.
Tank leaks at hose connection. Clamp is loose or damaged. Replace clamp.
Module is leaking. The Sealed module piston-diaphragm pump is
damaged.
Replace module with part No. E505-155-C.
Tank leaks at pump and pressure chamber
connection. The hose clamp is loose or the O-ring
is damaged.
Tighten the hose clamp, use part No. E501-021 to
replace the O-ring.
