22. Inspection Of Parts Subject To Wear - caprari K+ Serie Instrucciones De Servicio

K..065F.. / K.T040F..

22. INSPECTION OF PARTS SUBJECT TO WEAR

The life and performances of the pump parts vary with wear and corrosion according to the different conditions of use.If work is carried out on the
electric pump to check for wear on the hydraulic part and/or the shredder when installed, remember to comply with the following instructions also
consulting the typical section diagram for the references within brackets.If the parts are partially or totally clogged by the solid material carried along
by the conveyed fluid, thoroughly clean them with a jet of pressurized water. To clean the hollow space between the impeller and the oil chamber
shield, direct the pressurized jet from the pump casing delivery. This area can only be perfectly cleaned after the impeller has been removed.
GB
1. - Set the pump in a vertical position and ensure that it is stable. Mark the various parts so that they can be remounted in the same positions.
2. - Unscrew the bolts (Pos. L15) that fix the intake support.
3. - If the electric pump is the type with a single-channel impeller, check the play between the wear ring (Pos. L4) and the impeller collar (Pos. L2).
If the play exceeds 3 mm (difference between the inner ring diameter and the impeller clearance diameter) replace the ring and/or impeller or
restore the impeller clearance diameter by applying a steel ring at least 3 mm thick, subsequently machined in order to obtain a minimum 0.5
mm play (see fig. 1).
4. - If it is not excessive, wear between the impeller and intake support in series KT pumps can be recovered by adjusting the plugs (Pos. L10) of
the shield (Pos. L2) of the pump casing in order to obtain 0.2 to 0.5 mm float on the impeller blades making sure that the axial position of the
shredder blades is witn in ±0,5mm. Adjust by adding the relative flange seal (Pos.7) if necessary (see fig.2).
5. - If the punp casing or impeller are excessively worn, contact your nearest CAPRARI after-sales service center and askfor genuine spare parts.
Usse a socket screw wrench to remove the impeller. To demount the rotating part of the shredder, first remove the fillister socket screw then
use the two cavities for the puller at the base of the rotating part itself.
6. - The rubber parts, nuts and bolts must be thoroughly cleaned before the individual components are remounted and adjusted.
7. - Check that all rubber parts are in a good condition. Replace any that may have been damaged during the disassembly operations or as may
have deteriorated through wear.
8. - Check that the oil does not contain water. If this is the case, change the seal on the pump side.
9. - When reassembling the pump, proceed with the sequence of demounting phases in reverse, remembering to install all rubber seals in their
correct positions in compliance with the section diagram, checking the various parts with their relative original positions.
10. - Before tightening the impeller locking screw, apply a few drops of LOCTITE 242 on the screw thread and tighten with a 13 Nm (2.5 Kgm)
torque.
Fi g. 1
I m pel l er cl ear ance di am et er
I nner r i ng di am et er
26
Fig. 2
1, 5 m m
( M ax. di am et r al pl ay = 3 m m )
0, 25 m m
( M i n. di am et r al pl ay = 0, 5 m m )
Caprari S.p.A.