Graco Power-Flo Bulldog, Инструкция по эксплуатации

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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.
Before servicing this equipment, always make sure to
relieve the pressure.
NOTE: Check all possible problems and solutions
before disassembling the pump.
Problem Cause Solution
Pump fails to operate Restricted line or inadequate air sup-
ply
Clear line; see Technical Data on
pages 22--24.
Insufficient air pressure; closed or
clogged air valve, etc.
Open; clear.
Obstructed fluid hose or spray gun Clear.*
Dried fluid on the displacement rod. Clean; see Service on page 14.
Dirty or worn air motor parts Clean; service. See air motor manual,
supplied.
Air motor icing Reduce air line moisture content.**
Pump operates, but output is low
on both strokes
Restricted line or inadequate air sup-
ply
Clear line; See Technical Data on
pages 22--24.
Insufficient air pressure; closed or
clogged air valve, etc.
Open; clear.
Obstructed fluid hose or gun Clear.*
Open bleeder valve Close.
Air leaking into supply drum Check inductor on ram plate seal.
Fluid too heavy for pump to prime Use bleeder valve (see Operation on
page 8). Use inductor or ram unit.
Worn throat packings in displacement
pump
Replace gland/packing stack.
Air motor icing Reduce air line moisture content.**
Pump operates, but output low on
downstroke
Fluid too heavy for pump to prime Use bleeder valve (see Operation on
page 8). Use inductor or ram unit.
Held open or worn piston valve or
packings
Clear valve; replace gland/packing
stack.
Air motor icing Reduce air line moisture content.**
Pump operates but output low on
upstroke
Held open or worn piston valve or
packings
Clear valve; replace gland/packing
stack. p
Air motor icing Reduce air line moisture content.**
Continued on the following page.