
Repair
Diaphragm Diaphragm
Diaphragmand and
andCenter Center
CenterSection Section
SectionRepair Repair
Repair
NOTE: NOTE:
NOTE:Diaphragmkitsareavailableinarangeof
materialsandstyles.Seepages28–29.ACenter
RebuildKitalsoisavailable.Seepage23.Parts
includedintheCenterRebuildKitaremarkedwithan
*.Forbestresults,useallkitparts.
Disassemble Disassemble
Disassemblethe the
theDiaphragm Diaphragm
Diaphragmand and
andCenter Center
Center
Section Section
Section
1.FollowthePressureReliefProcedure,page10.
2.Removethemanifoldsanddisassemble
theballcheckvalvesasexplainedin
CheckValveRepair,page13.
NOTE: NOTE:
NOTE:Youmaywishtoremovetheinneruid
coverbolts(5)asyouremoveeachmanifold,for
convenience.
3.Overmolded Overmolded
OvermoldedDiaphragms Diaphragms
Diaphragms( (
(PO PO
POmodels) models)
models)
a.Orientthepumpsooneoftheuidcovers
(2)facesup.Usea17mmsocketwrenchto
removetheuidcoverbolts(5,6),thenpull
theuidcoverupoffthepump.
b.Theexposeddiaphragm(12)willscrewoffby
hand.Theshaftwilleitherreleaseandcome
offwiththisdiaphragm,orremainattachedto
theotherdiaphragm.Ifthediaphragmshaft
bolt(14)remainsattachedtotheshaft(108),
removeit.Removetheairsidediaphragm
plate(11)andwasher(17).
c.Turnthepumpoverandremovetheother
uidcover.Removethediaphragm(andthe
shaft,ifnecessary).
d.Iftheshaftisstillattachedtoeither
diaphragm,graspthediaphragmrmlyand
useawrenchontheatsoftheshaftto
remove.Alsoremovetheairsidediaphragm
plate(11)andwasher(17).Continuewith
Step5.
4.All All
AllOther Other
OtherDiaphragms Diaphragms
Diaphragms
a.Orientthepumpsooneoftheuidcovers
facesup.Usea17mmsocketwrenchto
removetheuidcoverscrews(5,6),thenpull
theuidcover(2)upoffthepump.Turnthe
pumpoverandremovetheotheruidcover.
b.Holdthehexofoneuidsidediaphragm
plate(15)witha1–1/2socketorboxend
wrench.Useanotherwrench(samesize)
onthehexoftheotherplatetoremove.
Thenremoveallpartsofeachdiaphragm
assembly.
5.Inspectthediaphragmshaft(108)forwearor
scratches.Ifitisdamaged,inspectthebearings
(107)inplace.Iftheyaredamaged,usea
bearingpullertoremovethem.
NOTE: NOTE:
NOTE:Do Do
Donot not
notremove remove
removeundamaged undamaged
undamagedbearings. bearings.
bearings.
6.Useano-ringpicktoremovetheu-cuppackings
(106)fromthecenterhousing.Bearings(107)
canremaininplace.
7.Ifnecessary,useasocketwrenchtoremovethe
pilotvalves(111).
8.Removethepilotvalvecartridgesonlyif
necessaryduetoaknownorsuspectedproblem.
After After
Afterremoving removing
removingpilot pilot
pilotvalves, valves,
valves,useahextoremove
thecartridges(109),thenremovecartridge
o-rings(110).Ifstripped,usetwoscrewdriversto
screwoutthecartridge.
NOTE: NOTE:
NOTE:Do Do
Donot not
notremove remove
removeundamaged undamaged
undamagedpilot pilot
pilotvalve valve
valve
cartridges. cartridges.
cartridges.
143A2714H