SPRAY & PUMP FAQ
Chapin Spot Sprayer Operator’s Manual - English
1. Why does the pump not run all the time?
This is a demand pump and only runs with flow; a specific pressure must be reached
before the pump turns off.
2. Why does the pump surge while using the spray wand?
Low flow may cause the pump to surge (or cycle). This could happen when the spray
wand is adjusted for a small or fine spray pattern. To overcome, slightly open the by-
pass valve, or adjust the nozzle to allow more flow.
3. How do I adjust the pressure
?
Pressure should be adjusted by regulating the by-pass valve (slightly opening or
closing).
4. My pump quit and will not restart - what should I check?
Check all electrical connections. Ensure switch is in the on position. Check in-line
fuse and/or fuse in car adapter end. Ensure correct v/- 10%. 12-14 volt
5. Low flow or no flow at all - what should I check?
Check for a clogged suction hose and/or suction strainer. Often you will need to
clean the suction strainer. Check for proper voltage. Check for crimped hosing.
6. Is there a fuse for the sprayer?
Yes, in-line to the 12V wiring harness.
7. What size fuse should I use as a replacement?
10 amp
8. How should I clean the tank after use?
•
Rinse tank thoroughly with water only, empty, refill with water.
•
Open shut-off and allow water to run through discharge assembly. Empty
sprayer.
•
If the unit is to be stored below freezing the best way to winterize is to run RV
antifreeze through both lines before storage, then purge with water in the spring.
9. Is there an adjustment screw on the pump to adjust pressure?
Yes, please refer to the operation instructions, “Adjusting the Pressure Switch”.
10. How do I remove / replace fuse?
Open fuse housing, remove fuse if blown, replace with equivialently rated fuse.
11. Can the spray tip on the wand be replaced with a different type of tip?
Yes, however your wand comes with a #18 tip which is standard. Brass tips generally
produce better spray patterns than plastic.
12. Each time I turn on the pump my fuse blows.
•
Excessive voltage
•
Improper adjustment of the pressure switch
•
Damaged wiring harness
13. Pump continues to run and surge when not spraying.
Ensure the by-pass is completely closed and your system has no leaks.
10E
