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TROUBLESHOOTING
CONDITION
Pump won't start
Pump will not prime
(No discharge with motor
running)
Pump will not shut-off
(output line closed and
no leaks)
Leaks from pump head
or switch
Pump output spits and
sputters
Pump makes noise, but
no output
Chapin Spot Sprayer Operator's Manual - English
CHECK
Correct voltage (±10%) and electrical connections
Fuse or breaker
Pressure switch operation
Rectifer or motor for open or grounded circuit
Locked drive assembly
Correct voltage at switch
Debris in strainer
Restriction (kinks) in inlet / outlet tubes
Debris / swelling in inlet / outlet valves
Bypass is not in "off" position
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
Loose screws at switch or pump head
Switch diaphragm ruptured or pinched
Punctured diaphragm if fluid is present
All hose clamps are adequately tight
No holes in tubing
There is adequate liquid in both the water and chemical tank
Adjust external bypass to optimize spray pattern
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.
8E
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