5E
TROUBLESHOOTING
Chapin Spot Sprayer Operator’s Manual - English
CONDITION
CHECK/SOLUTION
Pump won’t start
Correct voltage (12 - 13V) and electrical connections
Fuse or breaker
Pressure switch operation
Rectifer or motor for open or grounded circuit
Locked drive assembly
Correct voltage at switch
Pump will not prime
(No discharge with motor
running)
Debris in strainer
Restriction (kinks) in inlet / outlet tubes
Debris / swelling in inlet / outlet valves
Pump will not shut-off
(output line closed and
no leaks)
Air trapped in outlet line or pump head
Correct voltage to pump
Debris in pump inlet / outlet valves
Loose drive assembly or pump head screws
Pressure switch operations / adjustments
Leaks from pump head
or switch
Loose screws at switch or pump head
Switch diaphragm ruptured or pinched
Punctured diaphragm if fluid is present
Pump makes noise, but
no output
Prime with garden hose by removing intake hose and flood with water
while pump is running until water starts flowing (this may take up to 15
minutes to create suction).
To better understand the priming process see video at:
https://www.youtube.
com/watch?v=lrNeAvNL7Fs
or search “Priming the Pump on Your Chapin ATV
Sprayer” at Chapin International’s YouTube page
