Installer Manual Fleck 3900 - NXT - Maintenance
86 / 126 Ref. MKT-IM-015 / B - 08.06.2018
9.2.4. Upper piston and/or seal and spacer kit replacement
Caution
Use only approved silicone grease or soapy water.
9.2.4.1 Special tools needed
No. Operation
A Using a flat screwdriver, unscrew (1) and open the cover (2).
B Using a 32 mm wrench, unscrew (3).
C Using pliers, remove the clip (6) and the connecting pin (7).
D Using a 10 mm wrench, unscrew (4) and remove the upper power head (5).
E Using pliers, remove the piston (10).
F Using a small hook, remove a seal (12).
G Using the puller, remove a spacer (8 or 9).
H Repeat F and G for all the seals and spacers.
I Lubricate each new seals (12).
J Put back a seal (12) using the stuffer.
K Put back a spacer (8 or 9) using the stuffer.
Mandatory
Respect the order of the spacers shown on the sketch.
L Repeat J and K for all the seals and spacers.
M Lubricate the piston o-ring (11).
N Put back the piston (10).
O Follow A to D in reverse order to rebuild.
Item Part number Description
Packaging
quantity
1 12682 Puller 2" 1
2 12683 Stuffer 2" 1
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