WIKA CPP1200-X - Handbuch (Seite 30)

30 WIKA operating instructions model CPP1200-X
GB
14076968.01 12/2013 GB/D
7. Maintenance and cleaning
4. The high pressure seal (12) and low pressure seal (15) can now be replaced. Before
fitting the new seals check the ram is not scored on the locating diameters.
5. At this point the hub assembly should be checked for excess play indicating wear in
the bearing and for wear in the screwed spindle and nut. If any wear is found it will be
necessary to dismantle the hub assembly.
6. Check the bore of the block assembly (11) is not badly scored or pitted. If a replace-
ment is required this item is supplied complete with valves. The block is attached to
the base by socket head cap screws.
7. Re-assembly is a straightforward reversal of the above procedures.
On assembly care should be taken to align the ram to prevent bending,
or damage to the seals. Excessive force should not be used.
The socket head cap screws are not spaced equally around the locating
flanges so check hole alignment before inserting screws.
7.2.6 Hub assembly
1. Unscrew the ram from the spindle. NOTE: left hand thread.
2. Unscrew the spokes from the hub.
3. Knock out the spring pin (1), found at the bottom of one of the tapped spoke holes in
the hub, using a punch 6 mm dia. Pull off hub.
4. The hub locating plate and thrust bearing can now be removed from the spindle.
5. If the flanged bush (2) is to be renewed, it should be pressed out of the locating
plate and a new one pressed in squarely.
6. The thrust bearing (3) is renewed as a complete assembly.
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 soft jaw vice and screw in the new nut.
8. Assemble the thrust bearing, locating plate and hub on to the spindle, lubricating
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 fit spring pin (1).
10. Lubricate the thread with molybdenum disulphide grease and screw into ram nut.