Interpump Group Pratissoli EV-E4 Serie Manual De Reparación página 14

- Remove the pump shaft
- Complete disassembly of the con-rod units by removing
them from the pump casing and removing the piston
guide pins.
- Remove the pump shaft seal rings using common tools.
- Remove the piston guide seal rings as described below:
Use the extractor code 26019400 (Fig. 5, pos. ) and the pliers
code 25027000 (Fig. 5, pos. ). Insert the gripper as far as
possible onto the seal ring with the aid of a hammer (Fig. 5/a),
subsequently screwing the extractor to the gripper, and use
the extractor hammer (Fig. 6) until the ring to be replaced is
removed (Fig. 7).
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2
2.1.2 Reassembly of mechanical parts
After having checked that the casing is clean, proceed with
assembly of the mechanical part as described below:
- Insert the piston / con-rod guide units into the pump
casing.
To facilitate pump shaft insertion (without the tab), it
Fig. 5
is essential to repeat the operation performed during
disassembly, pushing the piston/con-rod guide units as far
down as possible (par. 2.1.1).
- Before assembling the side cover on the PTO side, check
the conditions of the radial ring lip seal and relative
contact area on the shaft.
If replacement is necessary, position the new ring using a tool
(code 27904500) as shown in Fig. 8.
If the pump shaft shows diametrical wear in
the area of contact with the lip seal, in order to
prevent the grinding operation, it is possible to
reposition the ring in abutment with the cover as
shown in Fig. 8.
Before assembling the side covers, make sure there are O-rings
on both of them and shim rings on the indicator side cover
only.
To facilitate filling of the first section and relative fitting of the
Fig. 5/a
covers on the casing, it is recommended to use 3 partially-
threaded M6 x 40 screws, (Fig. 8/a) to then complete the
operation with the screws supplied (M6x16).
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Fig. 6
Fig. 7