Interpump Group Pratissoli EV-E4 Serie Manual De Reparación página 17

Determining the shim pack:
Perform the operation while the piston/con-rod guide units
are assembled, the con-rod caps are disconnected and the
con-rods are pushed downwards. Insert the pump shaft
without tab into the casing, making sure the PTO shank comes
out of the correct side.
Secure the PTO side flange to the casing, taking care with the
lip seal as described previously and tighten the fixing screws
to the recommended torque.
Then feed the flange on the indicator side without shims in
the carter and start to move it closer, manually screwing the
M6x40 service screws in equally, with small rotations such as
to move the cover in slowly and correctly.
At the same time, check that the shaft rotates freely by turning
it manually.
Continuing the procedure in this way, a sudden increase in
hardness during shaft rotation will soon be experienced.
At this point, halt the forward movement of the cover and
loosen the fixing screws completely.
With the aid of a feeler gauge, measure the clearance between
the side cover and pump casing (Fig. 14).
Proceed to determine the shim pack, using the table below:
Detected Measurement
From: 0.05 to: 0.10
From: 0.11 to: 0.20
From: 0.21 to: 0.30
From: 0.31 to: 0.35
From: 0.36 to: 0.45
From: 0.46 to: 0.55
From: 0.56 to: 0.60
From: 0.61 to: 0.70
Fig. 14
Shim Type # pieces
/ /
0.1 1
0.1 2
0.25 1
0.35 1
0.35 1
0.10 1
0.25 2
0.35 1
0.25 1
17
Once the type and number of shims have been determined
using the table, check the following: assemble the shim pack
on the indicator side cover centering (Fig. 15), secure the cover
to the casing, following the procedure in par. 2.1.2, and tighten
the screws to their recommended torque.
Check that the shaft rotation stall torque is between 4 Nm and
6 Nm.
If this torque is correct, connect the con-rods to the bend
shaft and to the next stages. If it is not, redefine the shim pack,
repeating the operations.
2.2 REPAIRING HYDRAULIC PARTS
2.2.1 Disassembly of the head-valve units
Operations are limited to inspection or replacement of valves,
if necessary and, however, at the intervals indicated in the
"PREVENTIVE MAINTENANCE" table in chapter 11 of the
Use and maintenance manual.
The valve units are assembled inside the head.
Operate as follows to extract them:
- Unscrew the 4 M12x130 and 4 M12x45 suction valve cover
fixing screws and the 8 M12x35 outlet valve cover fixing
screws (Fig. 16 and Fig. 17);
- Extract the suction and outlet valve units using an
extractor hammer code 26019400 (Fig. 18).
Fig. 15
Fig. 16