5
824113
Troubleshooting
Relieve pressure; page 3.
Basic Problem Solving
Check everything in the troubleshooting table before disassembling the sprayer.
TYPE OF PROBLEM
WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK, refer to this column
Fluid pressure
1. Pressure control knob setting. The pump won’t
develop much pressure if it is at minimum set-
ting (fully counterclockwise).
1. Slowly increase pressure setting to see if
motor starts.
2. For clogged spray tip or fluid filter, if used. See
manual 308645 or 308664.
2. If tip is still clogged, relieve pressure; re-
fer to separate gun or tip instruction man-
ual for tip cleaning. Clean or replace filter
element. See manual 308249.
Mechanical
1. For frozen or hardened paint in pump (20). Us-
ing a screwdriver, carefully try to rotate fan at
back of motor by hand. See page 9.
1. Thaw sprayer if water or water-based
paint has frozen in sprayer. Place spray-
er in warm area to thaw. Do not start
sprayer until thawed completely. If paint
hardened (dried) in sprayer, replace
pump packings. See page 12
(Displacement Pump Repair).
2. Dixplacement pump connecting rod pin (17).
Pin must be completely pushed into connecting
rod (15), and retaining spring (18) must be
firmly in connecting rod groove. See Fig. 9,
page 12.
2. Push pin into place and secure with
spring retainer.
3. For motor damage. Remove drive housing as-
sembly (11). See page 15. Try to rotate motor
fan by hand.
3. Replace motor (4) if fan won’t turn. See
page 13.
Electrical
1. Electrical supply. Meter must read:
105–125 VAC for models 820169 and 824175.
1. Reset building circuit breaker; replace
building fuse. Try another outlet.
2. Extension cord for visible damage. Use a volt
meter or test lamp at extension cord outlet to
check.
2. Replace extension cord.
3. Sprayer power supply cord (50) for visible dam-
age such as broken insulation or wires.
3. Replace power supply cord.
See page 14.
4. Check motor brushes for the following:
a. Loose terminal screws.
b. Broken or misaligned brush springs.
c. Brushes binding in holders.
d. Broken leads.
e. Worn brushes.
NOTE: The brushes do not wear at same rate
on both sides of motor. Check both brushes.
4. Refer to page 10.
a. Tighten.
b. Replace broken spring and/or align
spring with brush
c. Clean brush holders. Remove carbon
with small cleaning brush. Align brush
leads with slot in brush holder to as-
sure free vertical brush movement.
d. Replace brushes
e. Replace brushes if less than 0.5 in.
long.