User's Manual

Repair
Repair Repair
Repair
Dura Dura
Dura
- -
-
Flo Flo
Flo
Lowers Lowers
Lowers
Disassembly Disassembly
Disassembly
Toavoidcrushinginjuriesormusclestrains,use
cautionwhendisconnectingthelower,itcanweigh
upto25kg(55lbs).
1.Stopthepumpatthebottomofitsstroke.
2.Relievethepressure.See
thePressureReliefProcedure,page13
.
3.Disconnectthehosesfromthelowerandplug
theendstopreventuidcontamination.
4.Loosenthecouplingnut(11)andremovethe
collars(10).SeeFig.8.
5.Removethecouplingnutfromthepistonrod(R).
6.Unscrewthelocknuts(8)fromthetierods(6).
7.Separatethemotor(3)andlower(7).
Torepairthelower,seetheDura-FloLower
instructionmanual311827.Thereareno
user-serviceablepartsinthemotor.Contactyour
Gracorepresentativeforassistance.
Reassembly Reassembly
Reassembly
NOTE: NOTE:
NOTE:
Ifthecouplingadapter(9)andtierods(6)
havebeendisassembledfromthemotor(3),see
ReassembletheCouplingAdapterandTieRodsto
theMotor,page19
1.Assemblethecouplingnut(11)tothepistonrod
(R).SeeFig.8.
2.Orientthelower(7)tothemotor(3).Position
thelower(7)onthetierods(6).Lubricatethe
threadsofthetierods(6).
3.Screwthetierodlocknuts(8)ontothetierods
(6).Tightenthelocknuts(8)andtorqueto50-60
ft-lb(68-81N•m).
4.Insertthecollars(10)intothecouplingnut(11).
Tightenthecouplingnut(11)ontothecoupling
adapter(9)andtorqueto90–100ft-lb(122–135
N•m).
5.Flushandtestthepumpbeforereinstalling
itinthesystem.Connecthosesandush
thepump.Whileitispressurized,checkfor
smoothoperationandleaks.Adjustorrepair
asnecessarybeforereinstallinginthesystem.
Reconnectthepumpgroundwirebefore
operating.
NOTE: NOTE:
NOTE:
WhenusedwithE-FloDCmotors,Dura-Flo
lowersrequirecheckvalve(35)tobeinstalled.
Figure8Dura-FloPumpAssembly
16 333389A