Repairing Hydraulic Parts; Dismantling The Head-Valve Units - Pratissoli KT Serie Manual De Reparación

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
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 centring (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

Dismantling 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 8 M14x40 suction valve cover fixing screws
and the 8 M12x35 outlet valve cover fixing screws (Fig. 16
and Fig. 16/a), using the extractor hammer code 26019400
combined with the tool 27726200, extract:
- The KT24-28-30-32-WK155-WK6 pump suction and outlet
valve plugs (Fig. 17);
- Extract the KT24-28-30-32- WK155-WK6 pump suction
and outlet valve units and KT 36-40-WK8 outlet valve units
using a simple tool as indicated in (Fig. 18) and a simple
tool as indicated in (Fig. 18);
- Extract the KT 36-KT40-WK8 pump suction valve units
using an extractor hammer code 26019400 combined with
tool code 27513600 (Fig. 19).
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
Fig. 15
20
Fig. 16
Fig. 16/a
Fig. 17