| Problem |
Cause |
Solution |
| Motor
runs and pump strokes but output is low or there is no output |
Too
small an extension cord or cord is ungrounded |
Replace
cord |
| Clogged
intake strainer |
Replace |
| Loose
suction tube or loose fittings |
Tighten,
use thread sealant or sealing tape |
| Check
motor brushes, check for loose leads and terminals, minimum 1/2 inch brush
length, broken or misaligned springs
|
Replace
parts as needed |
| Check
motor armature for shorts using an armature tester |
Replace
motor if bad |
| Check
to see if pump continues to stroke when gun trigger is released |
Relieve
pressure, service pump |
| Check
if intake valve ball and piston ball are seating properly |
Remove
intake valve and clean. Check ball and seat for nicks, replace if
necessary. Stain paint to remove particles that could clog the pump |
| Check
for leaking around throat packing nut which may indicate worn or damaged
packings |
Replace packings, check piston valve seat |
| Defective
pressure control transducer |
Replace
transducer |
| Motor
runs but pump does not stroke |
Check
displacement rod connecting pin |
Replace
pin |
| Check
for frozen or hardened paint in pump |
Thaw or
clean out paint, slowly increase pressure setting to see if motor starts |
| Be sure
crank in drive housing rotates |
Check
drive housing assembly for damage and replace as needed |
| Motor
is hot and runs intermittently |
Determine
if sprayer was operated at high pressure with small tips, which causes low
motor rpm and excessive heat build up |
Decrease
pressure setting or increase tip size |
| Be sure
ambient temperature where sprayer is located is no more than 90 degrees
and sprayer is not located in direct sun |
Move
sprayer to cooler area |
| Determine
if sprayer was turned on, pressurized, but not operating for a long time |
Turn
off sprayer whenever you stop spraying for a while and relieve fluid
pressure |
| GAS
PUMPS
Engine won't start |
Engine
switch is off, out of gas, oil level is low, spark plug cable damaged,
fuel shut off lever is off |
Correct
problem |
| Cold
engine |
Use
choke |
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