Graco LineLazer ES 1000 Operation - Repair - Parts page 26

Troubleshooting
Problem
Motor runs but pump does not stroke
Excessive paint leakage into throat packing
nut
Fluid is spitting from gun
Pump is difficult to prime
Sprayer operates for 5 to 10 minutes then
stops
26
What to Check
If check is OK, go to next check
Connecting rod assembly damaged.
Gears or drive housing damaged.
Throat packing nut is loose.
Throat packings are worn or
damaged.
Displacement rod is worn or
damaged.
Air in pump or hose.
Spray tip is partially clogged.
Fluid supply is low or empty.
Air in pump or hose.
Intake valve is leaking.
Pump packings are worn.
Paint is too thick.
Pump packing nut too tight. When
pump packing nut is too tight the
packings on the pump rod restrict
pump action and overloads the motor.
What to Do
When check is not OK, refer to this
column
Replace connecting rod assembly. See
pump manual.
Inspect drive housing assembly and
gears for damage and replace if
necessary.
Remove throat packing nut spacer.
Tighten throat packing nut just enough to
stop leakage.
Replace packings. See pump manual.
Replace rod. See pump manual.
Check and tighten all fluid connections.
Cycle pump as slowly as possible during
priming.
Clear tip.
Refill fluid supply. Prime pump. See
pump manual. Check fluid supply often
to prevent running pump dry.
Check and tighten all fluid connections.
Cycle pump as slowly as possible during
priming.
Clean intake valve. Be sure ball seat is
not nicked or worn and that ball seats
well. Reassemble valve.
Replace pump packings. See pump
manual.
Thin the paint according to supplier
recommendations.
Loosen pump packing nut. Check for
leaks around throat. If necessary,
replace pump packings. See Pump
manual.
3A4603C Operation, Repair, Parts