WAGNER ProjectPro 119 Owner's Manual - Figure 23 -
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WAGNER Project Pro 119 - 0418C
Figure 23 -
Pump section replacement instructions
Kit Part Number 0418716
Danger
Always wear protective eye wear while servicing the pump. Be sure to follow the Pressure Relief Procedure when shutting
the unit down for any purpose, including servicing or adjusting. After performing the Pressure Relief Procedure, be sure to
unplug the unit before servicing or adjusting. Area must be free of solvents and paint fumes.
Disassembly of the Pump Section
1. Removethesuctionset.
2. Removethefrontcoverandthethreescrewsthatsecureit
using a T20 Torx head driver.
3. Removetheyokescrew(1)andwasher(2)thatsecuresthe
dowel pin (3). The dowel pin connects the yoke (4) to the
piston (5).
4. Using a pliers, pull the dowel pin out.
5. Inspect the yoke assembly and piston. In order to remove all
the necessary parts, the piston must not be in the bottom
dead center position. If the piston is at the bottom of the
stroke, install the front cover and screws, turn the pump on
brieflytoindexthepiston,unplugtheunit,andrepeatstep2.
6. Loosenthescrewconnectionoftheinletvalveandremove
the solenoids (Figure 19 a). Make sure that the O-ring does not
get lost. Unscrew the inlet valve unit (6) from the basic unit.
7. Removethepistonassemblybypushingdownonthepiston
near the yoke.
8. Unscrew and remove the top nut (7) using and adjustable
wrench.
9. Removethewornsealsusingaflatheadscrewdriverorpunch.
Removethetopseal(8)fromthetopandthebottomseal(9)
from the bottom by pressing against the side of the seal and
popping it out. Be sure not to scratch the housing where the
seals are located.
10. Clean the area where the new seals are to be installed.
Assembly of the Pump Section
1. Lubricatethenewtopseal(8)withSeparatingOilorlight
household oil and by hand place the seal (cup side of seal
down) into the top port of the housing.
2. Place a small amount of bearing grease on the threads of the
top nut (7). Place the top nut into the top of the housing and
tighten with an adjustable wrench. This will drive the top seal
into the correct position.
3. Turnthepumpupsidedown.Lubricatethesealonthepiston/
seal assembly (5, 9) similar to the top seal. Place the piston/
seal assembly into the bottom of the housing.
i
DO NOT attempt to remove the bottom seals from the
new piston.
4. Insert the insertion tool (10) and thread into position to
properlyseatthepiston/seal.Threadfullyuntiltight.Remove
the insertion tool.
5. Align the piston (5) with the yoke (4). Be careful not to
damage the piston.
6. Apply a bearing grease to the holes in the yoke where the
dowel (3) is inserted.
7. Install the dowel pin (3) to connect the yoke to the piston. The
piston may have to be moved up or down to do this.
8. Install the yoke screw (1) and washer (2) to secure the dowel
pin.
9. Install the new O-ring (11) on the inlet valve assembly,
lubricatewithSeparatingOilorlighthouseholdoil,thread
into the bottom (inlet) of the housing, and tighten with an
adjustable wrench. This will drive the bottom seal into the
correct position.
10. TurnpumprightsideupandapplyafewdropsofSeparating
Oil or light household oil between the top nut (7) and piston
(5). This will prolong the seal life.
11. Install front cover and three (3) screws.
12. Install the suction set.