Graco TEXSPRAY 1030 - Manual (Page 8)

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Troubleshooting (Continued)
PROBLEM CAUSE SOLUTION
Engine operates, but
displacement pump does not
Connecting rod worn or damaged Replace connecting rod. See page 14.
displacement pump does not
(Continued)
Drive housing worn or damaged Replace drive housing. See page 15.
(Continued)
Pinion assembly worn or damaged Service pinion assembly. See page 16.
Engine operates, displace-
ment pump operates, but no
material pressure at gun
Flow control is set to PRIME Set flow control to LOW/MED/HIGH while
triggering gun.
material pressure at gun.
Fluid system over--pressurized Spraying material is too thick or the mate-
rial hose is too long. Use a less course
material or a shorter hose.
Gun nozzle/disk is clogged Check and clean nozzle/disk as needed.
Switch to a larger nozzle/disk.
Material flowing out drain line Check for air leaks to dump valve.
Check dump valve for wear, replace as
needed.
Air flow sensor dirty or damaged.
Pump is packed out Disassemble and clean pump (see page
8), hose(s) and gun.
Low fluid delivery Siphon hose strainer is clogged. Clean or remove strainer
Engine RPM too low Increase engine speed. See Startup,
procedure in operator manual.
Flow control set too low Increase flow control to MED or HIGH
Hose too long or material too
coarse
Change to a shorter hose or less coarse
material.
Material flowing out drain line Check drain line for a constant flow of
material when sprayer is operating in
LOW/MED/HIGH mode.
Check for air leaks to prime valve.
Check dump valve for wear, replace as
needed.
Gun nozzle/disk is clogged Check and clean nozzle/disk as needed.
Switch to a larger nozzle/disk.
Pump is packed out Disassemble and clean pump (see page
8), hose(s) and gun.
Loss of air control or volume
at gun
Gun air passages clogged with
material
After releasing gun trigger, make sure
system is fully depressurized before trig-
gering gun again. This helps prevent
material backing into gun passages.
Air filter dirty Clean or replace element
Air flow sensor dirty or damaged Check air filter.
Clean air flow sensor (see page 4) or re-
place as needed.
Displacement pump output
low on upstroke
Piston ball (220) not seating Clean piston area. See page 12.
low on upstroke
Piston packings worn or damaged Replace packings. See page 12.
Siphon hose coupling gasket (1e)
worn or missing.
Replace or install gasket
Pump cylinder o-ring (205) worn or
missing
Replace o-ring