Page 14
Isoil impianti SpA
Code MA/038/00/EN/03
All rights reserved. Reproduction of this manual is forbidden
•
Remove the main valve and the rubber seal ring.
•
Inspect the air vent valve, checking that it works properly and its part aren't damaged
•
Check rubber seal ring. If found damage or worn, replace with new one.
•
Reassembly the valve assembly
•
Close the drain plug and restore the operating conditions
4.5 Assembly
4.5.1 Measuring chamber assembly
Before assembly, clean and inspect all parts for any visual damage. Ensure that all o-ring
grooves are clean and undamaged. Examine the O-Rings and ensure that they are not
damaged or swollen, replace them if necessary. Examine graphite bushes on rotor assembly
for free rotation and play, replace them if either is apparent. Examine each vane assembly
for damage or wear, replace vane(s) if either is apparent. Examine gland seal rings in rotor
assembly for damage or wear and replace if either is apparent.
The assembly procedure is the reversal of the dismantling procedure; only for installation of
the internal body special precautions should be taken to match the centering cap of the
external body's front cover.
1. Assemble Gland Seal Rings (18) and Gland Clamps (19) on Rotor.
2. Insert Vane assembly with Vane Rods (24) into the Rotor.
Note :
Ensure that pocket on the Vane matches with the pocketed portion of
the Rotor slot.
3. Place Washers (13) on Vane Rods and reassemble remaining Vane on the Vane
Rod. Ensure position of slot as above.
4. While inserting Vane, reassemble Vane Rod Spring (12) in position.
5. Ensure that the Vane is seated on Washer by pressing it manually.
6. Compress Vane Rod Spring and insert Split Pin (11) in the Vane Rod.
7. Ensure that both Vane assemblies slide freely in the Rotor slots. Check by turning
the
Rotor by hand and allowing each vane assembly to fall under its own weight.
8. Clean and inspect Body and Rear Cover assembly.
9. Place Washer (28) in the Rear Cover (29).
10. Lower Rotor-Vanes assembly into the Body (18).
11. Ensure rear Ball Bearing (35) entering the Rear Cover properly. Check the rotation
of Rotor.
12. Check clearance between the vane tip and body bore. It should be within the range
0.1 mm to 0.145 mm. If clearances are not correct, make the necessary
adjustments with the help of 2 Lock Nuts (21-22) on the Vane Rod.
13. Assemble O’Ring (9) in the Body. Place Thickness (26) on the front Ball Bearing.