Graco 309489D, Instructions Manual

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11 309489
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
Relieve the pressure before you check or service any
system equipment.
NOTE: Check all possible problems and solutions
before disassembling the pump.
WARNING
Never operate the pump with the air motor plate
removed. Moving parts in the piston can pinch or
amputate fingers.
Problem Cause Solution
Pump does not operate, or no Loose or broken pump parts Disassemble, check, repair p p ,
fluid flow
Restricted line or inadequate air sup-
ply
Clear, increase
Exhausted fluid supply Refill and prime
Clogged fluid hoses Clean, or replace
Fluid intake or piston valves need
adjustment
Adjust, see page 12
Damaged air motor Repair; see 306982
Pump operates, but output is low
Insufficient air supply Increase
p p , p
Exhausted fluid supply Refill and prime
Obstructed gun or dispensing valve Clear
Damaged fluid pump packings Replace, see page 12
Held open or worn piston or intake
valve
Repair; see page 12
Erratic or accelerated operation Exhausted fluid supply Refill and prime p
Fluid intake or piston valve worn Repair; see page 12