Shindaiwa SP415 - Manual (Page 6)

6
Pump the lever with
the trigger valve
disconnected until
the discharge runs
clear
WARNING!
Remove all chemicals and wash before storing the
sprayer. Chemical products have different reactions and
can cause damage to the sprayer components and the
environment. Unidentified chemicals left in the sprayer
tank can pose a serious health threat to anyone servicing
the unit and unaware of its presence!
Periodically clean and lubricate the pump chamber and
actuating linkage with a high quality lithium grease.
Lubricate
Lubricate
(disassembly
required)
Lubricate
Pump Disassembly
Pump Lever
Connecting
Rod Nut
Packing
Ring Nut
Cleaning the Sprayer
After finishing the spray application, empty the sprayer and
wash all equipment in an approved decontamination area.
1. Loosen the pump lever
connecting rod nut and
remove the connecting rod
from the chamber. Loosen
the packing ring nut that
secures the chamber to
the tank. Remove the tank
lid and strainer, reach
inside the tank and
remove the agitator from
the pump chamber, then
remove the chamber from
the cylinder.
Tank Lid
Maintenance
2. Using the 452284 all-purpose wrench,
remove the piston cup fastener and
cup. Replace piston cup as necessary.
5. From the bottom of the piston cup
fastener, push the diaphragm out
towards the top.
4. Remove the two Phillips head screws
and washers located at the bottom of
the cylinder and remove the cylinder
base.
5. From the bottom of the cylinder, push
the diaphragm out towards the top of
the cylinder.
7. Clean all parts and carefully inspect
for worn or damaged parts and replace
as necessary.
8. Reassemble in the reverse order.
NOTE:
Lubricating diaphragms and all moving
parts with a high quality lithium grease
will ease assembly and prolong the life of
the unit.
Pump
Chamber
Piston
Cup
Chamber
Valve
Cylinder
Washer
Screw
Piston Cup
Fastener
Troubleshooting: Lack of Pressure
Pump Disassembly (cont.)
CAUSE REMEDY
Leakage through
the upper cylinder.
After pumping and
pressurizing the
chamber, the pump
lever drops rapidly
when released.
After pumping and
pressurizing the
chamber, the pump
lever rises slowly
when released.
Low pressure and
pump lever hard to
operate.
Worn or dried out
piston cup.
Cylinder diaphragm
not sealing properly
due to wear or
impurities.
Chamber dia-
phragm not sealing
properly due to
wear or impurities.
Pump chamber
filled with liquid.
Lubricate or replace
the piston cup.
Clean or replace the
cylinder diaphragm.
Clean or replace the
chamber dia-
phragm.
Tighten screw cap
at top of chamber.
With an empty tank,
pump lever with
trigger valve open
until all liquid is
purged from pump.
Pump Chamber
Piston Cup
Chamber Diaphragm
Cylinder Diaphragm
Cylinder
SYMPTOM