Troubleshooting - North Star M99905C Owner's Manual

Before troubleshooting or attempting to service, read the following safety rules to avoid
accidental exposure to chemical and also risk of electric shock.
Note: A reserve, clean container capable of holding at least 16 gallons (Model # 99905) or 26
gallons (Model # 99906) should be kept for use when the sprayer tank needs to be emptied
temporarily for repairs. It is advisable to purchase a reserve tank suitable for pesticide
storage from Northern Tool + Equipment for use in these circumstances. The container
should be properly labeled as to its contents if it is used.
Before attempting to service the sprayer:
1. Personal protective
equipment
2. Review

troubleshooting

table
3. Empty and flush
4. Disconnect
power/relieve
pressure
5. Perform repairs
6. Test after servicing
PROBLEM
Pump will not turn on
Low pressure
Low flow
Poor spray distribution
Pump cycles while not
spraying
Troubleshooting
WARNING
Wear personal protective equipment as directed on the chemical
label while servicing your sprayer.
Review the Troubleshooting Table below for the type of problem
you are experiencing. However, DO NOT attempt to repair until
the steps listed below are followed.
Empty the tank and flush the sprayer with water as directed in
the section, "Operation – Step Four".
- In order to avoid accidental exposure to chemicals, never attempt
to service the sprayer until the tank has been emptied and the
sprayer flushed with water.
Disconnect power to the sprayer and be sure all system pressure
is relieved by squeezing the gun trigger.
Follow the directions provided in the troubleshooting table to
repair the sprayer.
NOTE: Never try to unclog the sprayer nozzle by blowing through it.
After servicing, ALWAYS test the sprayer for leaks with plain
water before using.
CAUSE
Bad electrical connection
Fuse blown
Short in wires
Low voltage
Worn spray gun nozzle
Worn boom nozzle
Clogged intake tube
Clogged suction strainer
Low voltage
Clogged intake tube
Suction strainer clogged
Worn spray gun nozzle
Leak in the system
36
SOLUTION
Check battery connections
Replace fuse
Check condition of wires
Check voltage
Replace spray gun
Replace boom nozzle
Remove obstruction
Clean suction strainer
Check voltage
Remove obstruction
Clean suction strainer
Replace spray gun
Tighten leaking hose clamps or fittings,
replace spray gun