
37
GB
7. Maintenance, cleaning and recalibraon
7.2.6 Hub assembly
1. Unscrew the ram from the spindle.
le hand thread.
NOTE:
2. Unscrew the spokes from the hub.
3. Knock out the spring pin
(1)
, found at the bo om of one of the tapped spoke holes in
the hub, using a punch 6 mm dia. Pull of hub.
4. The hub locang plate and thrust bearing can now be removed from the spindle.
5. If the langed bush
is to be renewed, it should be pressed out of the locang
(2)
plate and a new one pressed in squarely.
6. The thrust bearing
is renewed as a complete assembly.
(3)
7. The nut, pin and spindle sub-assembly
(4)
can only be replaced as a matched pair.
Unscrew the nut from the ram, gripping in a so jaw vice and screw in the new nut.
8. Assemble the thrust bearing, locang plate and hub on to the spindle , lubricang
with molybdenum disulphide grease.
9. Clamp these items together to eliminate end play and re-assemble spring pin. If
using new spindle drill through 6.3 mm diameter to it spring pin
(1)
.
10. Lubricate the thread with molybdenum disulphide grease and screw into ram nut.
7.2.7 Piston-cylinder unit
As the piston-cylinder unit represents a high proporon of the total value of the pressure
balance, it should always be handled with care and every efort made to keep it clean.
The piston-cylinder unit is made to extremely ine limits of accuracy and it is not
f
advisable to dismantle it. If it is necessary to clean it, the piston and cylinder bore must
be oiled immediately, in order to protect the high grade inish.
f
Should the unit become damaged it should be returned complete for replacement or
repair. Parts from dif erent units are not interchangeable as they have to be weighed and
f
evaluated as a whole.
The serial number of the piston-cylinder unit appears in the cer icate of accuracy and
f
is marked on the body of the unit. This number, as well as the pressure balance serial
number should always be quoted in correspondence concerning the piston/cylinder unit.
The piston-cylinder connecons should be blanked if it is removed from the pressure
balance. If the unit is taken of for any reason it should be stored upside-down, resng
on its weight carrier.
Manual M
LDW-HK
odel
LR-
Cal
Содержание LDW-HK
Страница 16: ...16 GB 3 Speci ica ons f Side view Dimensions in mm without masses Front view Manual M LDW HK odel LR Cal...
Страница 21: ...21 GB 4 Design and func on G D C F E H J K Sec oned view of screw pump Manual M LDW HK odel LR Cal...
Страница 46: ...46 GB Manual M LDW HK odel LR Cal...
Страница 91: ...91 No zen Notes Anleitung Modell LDW HK Druckwaage Kolbenmanometer LR Cal...