Graco EcoQuip 2 EQm [26/74] 3a3489c

Graco EcoQuip 2 EQm [26/74] 3a3489c
Troubleshooting
Problem Problem
Problem
Cause Cause
Cause
Solution Solution
Solution
Theabrasiveballvalvewas
leftopenduringshutdown.
SeeShuttingDown,page21,step2.
Theabrasiveballvalveis
worn.
Withthepotpressurizedandtheabrasiveballvalveclosed,
engagetheblastcontrolswitch(B)andchecktomakesure
thepumpisstalled.Ifthepumprodiscreeping,replacethe
abrasiveballvalve(M).
Theblasthoserecoils
heavilywhentheblast
controlswitch(B)is
engaged.Largeslugs
ofabrasiveandwater
areejectedfromnozzle.
Thepinchhoseisworn.Withthepotpressurizedandtheabrasiveballvalve
open,checktomakesurethepumpisstalled.Ifthe
pumprodiscreeping,replacethepinchhose.See
ReplacingthePinchHose,page33.
Thewaterpressureregulator
ismalfunctioning.
Adjustthewaterpressureregulatorto185psi(12.75bar,
1.275MPa).Ifthisadjustmentisnotpossible,servicethe
waterpressureregulator(seemanual309474).
Thepotpressurerelief
valveisdischarging
water.
Thepressurereliefvalvehas
failed.
Replacethepressurereliefvalveifweepingoccursator
below185psi(12.75bar,1.275MPa).
263A3489C

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