A SERVICE OF

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14 ProSpray 3.23
GB
Servicing Repairs at the unit
10. Servicing
10.1 General servicing
Servicing of the unit should be carried out once annually by the
WAGNERservice.
1. Check high-pressure hoses, device connecting line and
plug for damage.
2. Checktheinletvalve,outletvalveandlterforwear.
10.2 High-pressure hose
Inspect the high-pressure hose visually for any notches or
bulges,inparticularatthetransitioninthettings.Itmustbe
possible to turn the union nuts freely.
11. Repairs at the unit
Switch the unit OFF.
Before all repair work: Unplug the power plug
from the outlet.
11.1 Relief valve
1. Useadriftpunchof2mmtoremovethegroovedpin(Fig.
10,Item1)fromthereliefvalvehandle(2).
2. Removethereliefvalvehandle(2)andcambase(3).
3. Usingawrench,removethevalvehousing(4)fromthe
pumpmanifold(6).
4. Ensurethattheseal(5)isseatedcorrectly,thenscrewthe
newvalvehousing(4)completelyintothepumpmanifold
(6).Tightensecurelywithawrench.
5. Alignthecambase(3)withtheholeinthepumpmanifold
(6).Lubricatethecambasewithgreaseandslideonthe
cam base.
6. Bringtheholeinthevalveshaft(7)andinthereliefvalve
handle(2)intoalignment.
7. Insertthegroovedpin(1)tosecurethereliefvalvehandle
in position.
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11.2 Inlet and outlet valve
1. Remove the four screws in the front cover and then
remove the front cover.
2. SwitchtheunitONandthenOFFsothatthepistonrodis
positioned in the lower stroke position.
Danger of crushing - do not reach with the
ngers or tool between the moving parts.
3. Unplugthepowerplugfromtheoutlet.
4. Remove the retaining clip from the connecting bend at the
suction hose and pull off the suction hose.
5. Screw off the return hose.
6. Swiveltheunit90°totherearinordertoworkmoreeasily
on the material feed pump.
7. Remove the pusher stem clip and slide the pusher stem
housing(7)fromtheinletvalvehousing(1).
8. Unscrewtheinletvalvehousing(Fig.11,Item1)fromthe
pump manifold.
9. Removethelowerseal(2),lowerballguide(3),inletvalve
ball(4),inletvalveseat(5)andO-ring(6).
10. Clean all the parts with the corresponding cleaning agent.
Checktheinletvalvehousing(1),inletvalveseat(5)
andinletvalveball(4)forwearandreplacethepartsif
necessary.Iftheworninletvalveseat(5)isunusedon
one side, install it the other way round.
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11. Unscrewoutletvalvehousing(Fig.12,Item8)fromthe
piston(9)withadjustingwrench.
12. Removetheupperballcage(11),crushwasher(10),
outletvalveball(12),andoutletvalveseat(13).
13. Clean all the parts with the corresponding cleaning agent.
Checkoutletvalvehousing(8),outletvalveseat(13),
outletvalveball(12),crushwasher(10),andupperball
cage(11)forwearandreplacepartsifnecessary.Ifthe
wornoutletvalveseat(13)isunusedononeside,installit
the other way round.
14. Carry out installation in the reverse order. Lubricate O-ring
(Fig.11,Item6)withmachinegreaseandensureproper
seatingintheinletvalvehousing(Fig.11,Item1).
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