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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. Remove the suction set.
2. Remove the front cover and the three screws that secure it
using a T20 Torx head driver.
3. Remove the yoke screw (1) and washer (2) that secures the
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
briey to index the piston, unplug the unit, and repeat step 2.
6. Unscrew and remove the inlet valve assembly (6).
7. Remove the piston assembly by pushing down on the piston
near the yoke.
8. Unscrew and remove the top nut (7) using and adjustable
wrench.
9. Remove the worn seals using a at head screwdriver or punch.
Remove the top seal (8) from the top and the bottom seal (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. Lubricate the new top seal (8) with Separating Oil or light
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. Turn the pump upside down. Lubricate the seal on the piston/
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
properly seat the piston/seal. Thread fully until tight. Remove
the insertion tool.
5. Install the new O-ring (11) on the inlet valve assembly,
lubricate with Separating Oil or light household oil, thread
into the bottom (inlet) of the housing, and tighten with an
adjustable wrench. This will drive the bottom seal into the
correct position.
6. Align the piston (5) with the yoke (4). Be careful not to
damage the piston.
7. Apply a bearing grease to the holes in the yoke where the
dowel (3) is inserted.
8. 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. The inlet
valve may need to be removed again to move the piston.
9. Install the yoke screw (1) and washer (2) to secure the dowel
pin.
10. Turn pump right side up and apply a few drops of Separating
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 inlet valve assembly. Install the suction set.
Danger
If the supply cord of this appliance is damaged, it
must only be replaced by a repair shop appointed
by the manufacturer, because special purpose tools
are required.
Danger
Do not connect the blue or brown wire to the earth
terminal of the plug! The wires in this mains lead
are coloured in accordance with the following code:
blue = live brown = live
As the colours of the wires in the mains lead of this appliance
may not correspond with the coloured markings identifying the
terminals in your plug, proceed as follows:
• Shouldthemouldedplughavetobereplaced,neverre-use
the defective plug or attempt to plug it into a dierent 13A
socket. This could result in an electric shock.
• Shoulditbenecessarytoexchangethefuseintheplugonly
use fuses approved by ASTA in accordance with BS 1362. Ten
(10) Amp fuses may be used.
• Toensurethatthefuseandfusecarrierarecorrectlymounted,
please observe the provided markings or colour coding in the
plug.
• Afterchangingthefuse,alwaysmakesurethatthefuse
carrier is correctly inserted. Without the fuse carrier, it is not
permissible to use the plug.
• Thecorrectfusesandfusecarriersareavailablefromyourlocal
electrical supplies stocklist.
NEVER use a
light socket
Brown to be
connected to L
(live)
Fit the
recommended
fuse
Fit a BS 1363A
approved plug
Blue to be
connected to
N (neutral)
Make sure that
the outer sheath
of the cable is
held firmly by the
clamp
12
PP119