Hudson SP0 User manual

SP0 & SP1 Knapsack Sprayer
We would like to congratulate you on the purchase of your new SP0. The
sprayer that allows you the easiest, most comfortable way of carrying out your
farm, garden, etc. projects with the revolutionary piston diaphragm pump
(patented), that all but eliminates the problems inherent in most sprayers. As a
new owner of the skillfully engineered SP0, we strongly recommend you carefully
read and follow all the information.
HOW TO ASSEMBLE:
1. Attach spray wand to spray gun and tighten firmly.
2. Take pump handle Kit 7 (solid) and insert into the tube on the pump lever
Kit 5 (“T” shape lever on sprayer) you will notice holes drilled through both
sides of both the pump handle and the pump lever. Align these holes;
take the “R” pin provided and place through the holes. This affixes the
handle in place and is ready for use. For storage reverse process and
then place “R” pin through the pump lever Kit 5 to keep from losing “R”
pin.
3. Instructions for installing shoulder strap plastic buckle: First put the
sprayer on a hard flat surface, take the white plastic buckle and while
holding the sprayer up slightly, place buckle under the tubular metal
frame. Slowly push down forcing the frame into the buckle. Repeat the
same procedure for the other side.
HOW TO PREPARE FOR USE:
1. Remove cap.
2. Mix solution in a separate receptacle, following manufacturer's directions
on the container.
3. Pour pre-mixed solutions into sprayer and cap.
4. Place sprayer on back and pressurize tank by pumping approximately 10
to 15 times. For best results, the sprayer should be pumped every 5
seconds on a continuous basis. This will maintain your spraying pressure.
If you do not pump, you will not have pressure to spray.
5. Always oil the seal on cap of unit as well as the check valve, this will
extend life of seal and is important for obtaining proper seal with no leaks.
6. A unit that has been used with herbicides should never be used to spray
insecticides, unless the sprayer has been properly cleaned and all other
chemicals neutralized. Failure to do this could cause you to kill plants that

have been sprayed. Consult with the manufacturer of the chemicals in
use to obtain proper instructions.
HOW TO CLEAN & MAINTAIN:
1. Remove cap and pour out remaining solution, then rinse all parts
thoroughly with clean water.
2. Leaving approximately ½ gallon of fresh water in tank, pressurize and
flush pumping system by depressing trigger at least 2 minutes then drain
all remaining water.
3. Always store tank clean and empty in a dry, shaded location.
Please read and follow all instructions before using sprayer.
Before using, filling or cleaning any sprayer, read all parts of the
operating instructions.
Make sure to set up the sprayer exactly as explained above.
Wear protective clothing, respirator, gloves, eye protection, etc.
whenever using, filling or cleaning sprayer.
Periodically re-grease lid gasket as well as lid vent and pump cylinder,
where applicable.
To ensure good performance, keep lid vent free of obstruction. Before
and after each use, make sure all connections are well tightened. Service
and replace worn parts as required.
Read and follow all instructions of the chemical suppliers.
As a rule, mix your chemicals in a separate container from which to fill
the sprayer. Do not mix formulas inside the sprayer. When an exception
is made (e.g. with liquid fertilizers), fill sprayer with water BEFORE adding
the active ingredient.
Always sift formula through the screen. IF there is no built-in strainer,
use a screened funnel. Never fill the sprayer with hot liquids. Maximum
30°C or 85°F.
This sprayer is made to handle agrochemicals in their usual water or oil
solutions. Do not use flammable, corrosive or caustic solutions.
Never use gasoline or other flammable materials.
Before cleaning or servicing the sprayer, allow all pressure to escape.
Do not store or transport sprayer under pressure.
After each use, wash the sprayer –including hose, lance and shut off
valve –with plenty of fresh water. Unless spraying is to be continued
within hours, drain chemical formula and thoroughly rinse the tank and all
liquid ducts.
Never store chemicals in your sprayer for any length of time.

Use the sprayer only for the kind of jobs for which it was designed.
When in doubt, ask your dealer.
Do not leave the sprayer in reach of children or persons not qualified to
handle it in proper fashion.
When not in use –and especially during prolonged storage keep your
sprayer in a protected place away from direct solar heat.
Make sure the spray hose loops freely without kinking or squeezing.
TROUBLESHOOTING GUIDE
The letters designate the units that could have this type of problem.
“A” – SP1, SP1-E, SPO & Estate Keeper
“B” – SP80, SP100 & SP5
“C” – SVV 1,2 & 3 GALLON
“D” STAINLESS 1,2 & 3 GALLON
PROBLEM 1 “A”
The unit is new or has not been used for a long time. You pump it but you are
unable to build pressure and/or fluid comes out of the wand.
CAUSES (S)
The check valves in the pump module have become stuck and/or there is an air
lock in the unit because of differences of pressure. Note this is not uncommon.
SOLUTION (S)
Squeeze trigger on spray gun to release air and pump profusely several times.
This will break the seals and allow fluid to pass.
PROBLEM 2 “A, B, C, D”
When you squeeze the trigger on the spray gun, it sticks and is slow in returning
to the shut off position when you release trigger.
CAUSES (S)
These O-rings have been under chemical attack and have deteriorated. Put in
Repair Kit 20.
SOLUTION (S)
Replace O’ rings in spray pistol and on brass spindle inside the spray gun. If
these O’ rings have deteriorated you should also replace all other O’ rings and
seals in your sprayer before leaks or other problems occur.
PROBLEM 3 “A, B, C, D”
The pin in the spray pistol sticks when pushed; when you release the trigger the
pin does not come back up to shut off the flow.
CAUSES (S)
The O’ rings and washer on the spindle inside the spray pistol have deteriorated
from age or chemical attack. Put in Repair Kit 20

SOLUTION (S)
Unscrew cap on bottom of spray pistol, push out brass spindle and replace the o-
rings and washer.
PROBLEM 4 “B”
The sprayer will not pressurize –you pump but no pressure is built up –the unit
only sprays when you pump.
CAUSE (S)
The pump module (tube) has lost the air pressure head. All the air has escaped
from the top of the pump module due to improperly tightened siphon, nut, and
hose assembly. The washer that comes with the siphon, nut, and hose assembly
has deteriorated and is no longer sealing properly 2. Split or cracked pump
module.
SOLUTION (S)
Empty sprayer of spraying solution. Unscrew cap (nut) from the top of pump
module and remove. Turn sprayer up side down in order to empty pump module,
be careful not to lose the stainless steel ball inside pump module. Once pump
module is empty, put stainless steel ball back inside pump module and place
siphon tube back in pump module, tighten cap (nut) with wrench provided. Make
sure it is very tight. Unit should be ready to operate. 2. Tighten the nut at the top
of the pump module with the small wrench provided. 3. If cap is tightened,
replace washer in siphon nut hose assembly. 4. If pump module is cracked
replace with spare parts available on our website.
Click here for SPO breakdown:
http://mkrittenhouse.com/ca/backpack-sprayer-sp0-parts
http://mkrittenhouse.com/us/backpack-sprayer-sp0-parts
Click here for SP1 breakdown:
http://mkrittenhouse.com/ca/swissmex-backpack-sprayer-sp1-parts
http://mkrittenhouse.com/us/swissmex-backpack-sprayer-sp1-parts
PROBLEM 5 “A”
Your unit has been in use for some time. You pump the unit, however you can’t
build pressure, infect, if you stop pumping, very little liquid will come out.
CAUSE (S)
1.The O-rings and the check valve on the pump module have been attacked by
chemicals and are no longer sealing. There are two o-rings, one large, one small
and one check valve.
2. The pressure chamber has expanded due to pressure and/or chemical attack.
SOLUTION (S)
1. Change the O-rings and seals from the pump module Kit 12. If these seals
have deteriorated you should change all rubber seals in the unit. If the above

does not solve your problem then: 2. You should change the pressure chamber
Kit 9 and install a new one.
PROBLEM 6 “A”
The unit leaks where the pump module is connected (screwed in) to the sprayer.
CAUSE (S)
The O-rings have deteriorated. SOLUTION
(S)
Change the O-ring and seals from pump module Kit 12. At this point one should
change all rubber seals in the unit.
PROBLEM 7 “A, B”
Fluid is leaking from cap where it is screwed into the tank and should seal with
the tank.
CAUSE (S)
Because of capillary action fluid is being pulled through by pressure. SOLUTION
(S)
Cap may be loose. Oil the gasket with 30-weight oil. This will stop the passage of
fluid.
PROBLEM 8 “A, B”
Unit falls onto its side and leaks through the center of the cap where the check
valve is.
CAUSE (S)
Deteriorated check valve, or could be dusty or have some dirt or foreign matter.
SOLUTION (S)
Pull check out. If deteriorated, replace. If not, clean out. Place a small drop of
oil and reinstall.
PROBLEM 9 “A”
Unit is leaking from the area just below where the large metal or plastic clamps
are where the pump module and pressure chamber enter the unit. CAUSE (S)
1.The hose clamp is loose. 2. The o-ring has deteriorated. SOLUTION (S)
1. Tighten hose clamp. 2. Install new o-rings. If the o-ring has deteriorated you
should install all new ones.
PROBLEM 10 “A”
Unit is brand new and is leaking from where hose connects with the sprayer and
possibly where the large hose clamp holds pump module & chamber in place.

CAUSE (S)
The factory does not fully tighten these clamps to ensure longer life. There is an
orange tag on the side of unit that says hose clamps should be tightened.
SOLUTION (S)
Tighten clamps with screwdriver.
PROBLEM 11 “A, B”
Unit works properly but the tank starts to collapse, you can’t unscrew to pull the
cap off the unit. It seems to have created a vacuum.
CAUSE (S)
The vent hole in the cap has become clogged with dirt and is not allowing air into
the tank.
SOLUTION (S)
Take a small wire and push in through the vent hole. This will allow air into the
tank and release the vacuum. Take cap off, clean vent hole, clean check valve,
oil valve & reinstall.
PROBLEM 12 “C, B”
Pump module on SVV & stainless; when you are pumping your unit, some fluid is
com-ing back up thro-ugh the pump.
CAUSE (S)
The small plug at the top of the pump module has deteriorated due to chemical
attack.
SOLUTION (S)
Pull out the small check (antenna with o-ring) and replace with new unit.
PROBLEM 13 “C, D”
Pump module; when pumping the unit slips and does not seal properly to push
air into unit.
CAUSE (S)
The rubber or leather check inside pump has dried out or has cracked.
SOLUTION (S)
Take top off pump module and check seal. If cracked, replace. If dry, place
some lubricating grease on seal.