Field Troubleshooting - AIRLESSCO LP460 Service & Operation Manual

FIELD TROUBLESHOOTING

PROBLEM
Unit doesn't prime
Unit primes but has no
or poor pressure
Unit does not maintain
good spraying pressure
Unit does not run
CAUSE
†Airleak due to:
• Loose Suction Nut
• Worn O-Rings
• Hole in Suction Hose
†Stuck or Fouled Balls
†Pressure set too low
†Filter(s) are clogged
†Outlet Valve fouled/worn
†Prime/Pressure Relief valve
bypassing
†Packings and/or piston worn
†Blown spray tip
†Packings and/or piston worn
†Upper Seat worn
†Blown fuse
†Electrical failure
SOLUTION
• Tighten Suction Nut
• Replace O-Ring (106-011) on
suction seat, & O-Ring (106-020)
below suction seat
• Replace Suction Hose (331-290)
†Service outlet valve suction
assembly
†Turn up pressure
†Clean or replace gun filter, inlet
filter and/or manifold filter
†Service outlet valve
†Clean or replace primve valve
• Tighten packing nut
• Repack unit
†Replace spray tip
†Repack unit
†Replace upper seat
†Replace fuse
• 15A SlowBlow
(pn. 331-256) - 4 Series
• 20A SlowBlow
(pn. 331-328) - 5&6 Series
†See electrical troubleshooting -
4 Series & 5-6 Series
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