Interpump Group SWS71 Manual De Reparación página 17

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:
- Assemble the upper and lower half-bearings in
their seats in the con-rods and caps.
Make sure that the reference marks on the upper
(Fig. 6, pos. ) and lower (Fig. 6/a, pos. ) half-
bearings are positioned in their respective seats
in the con-rod and cap.
If the piston guide rods have been disassembled, before
reassembling them check the correct positioning of the
sealing O-rings (pos. , Fig. 6/b), if necessary replace them.
Tighten the piston guide rods through the respective two
M6 screws to the tightening torque indicated in the table of
page 24.
1
Fig. 5/d
- Insert the piston/con-rod guide units into the pump
casing, directing the numbering on the con-rod shank
towards the top of the casing.
To facilitate pump shaft insertion (without the tab), it
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 the
tool (code 27904800) as indicated in Fig. 7.
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. 7.
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
covers on the casing, it is recommended to use 3 partially-
threaded M6 x 40 screws, (Fig. 8, pos. ) to then complete the
operation with the screws supplied (M6x18).
Fig. 6
RING POSITION TO REMOVE SHAFT IF
Fig. 6/a
17
RING POSITION ON FIRST ASSEMBLY
WORN
Fig. 6/b
Fig. 7