The Utile Engineering Co. Ltd.
11/08/06
Irthlingborough, Northamptonshire. England
Tel: +44 (0) 1933 650216
Fax: +44 (0) 1933 652738
13 IC154
5.
Removal of Bearings and Seals
With the drive end coverplate (2) already removed as described in 2 for blade inspection.
5.1
Remove circlip (12) from its groove then slip off bearing retaining washer (7) then using a two-leg pulley
drawer the roller bearing inner race (9) can be removed from the shaft.
5.2
The roller bearing outer race (9) can be pressed out of the coverplate for inspection.
5.3
Inspect the bearing, renew if it shows any signs of wear or pitting.
5.4
Push the shaft seal (13) out of the end cap (8).
5.5
Examine the shaft seal (13) and renew if the wiping lip is worn or damaged.
With the rear end coverplate (3) already removed complete with rotor as described in 4 for cylinder renewal.
Do not mix the different ends components together, as internal clearances will be affected.
5.6
Undo four screws (33) and remove end cap (8) together with the two shaft seals (13).
5.7
Remove the circlip (12) from its groove, then slip off the bearing retaining washer (7), then release the
bearing angle ring (11).
5.8
Using a two-leg pulley drawer pull the coverplate (3) complete with outer race of roller bearing (10) from the
shaft.
5.9
The roller bearing outer race (10) can be pressed out of the coverplate for inspection.
5.10
Using a two-leg pulley drawer the roller bearing inner race (10) can be removed from the shaft.
5.11
Inspect the bearing, renew if it shows any signs of wear or pitting.
5.12
Push the shaft seal (13) out of the end cap (8).
5.13
Examine the shaft seal (13) and renew if the wiping lip is worn or damaged.
6. Reassembly
Procedure
This section only applies when using original bore size or replacement cylinder. Before commencing reassembly
ensure all components are perfectly clean and oilways are clear. Lightly smear the shaft with oil to assist assembly.
The correct clearances for these machines are: -
LW625 LW825
Drive End Coverplate / Rotor
0.33mm / 0.38mm
0.38mm / 0.44mm
Rear End Coverplate / Rotor
0.10mm / 0.13mm
0.10mm / 0.13mm
Rotor / Cylinder
0.10mm / 0.13mm
0.10mm / 0.13mm
Reassembly should start with the preparing of the rotor and shaft assembly by the fitting of the replacement
spacing rings (6) (if required) and the inner races of the roller bearings (9 & 10).
6.1
The spacing rings (6) are retained on the clean shaft using LOCTITE 648 adhesive or equivalent, and
should be pushed hard against the rotor face with the slot away from the rotor face. It is essential that the
width of the spacing ring is identical to the one it is replacing or internal clearances may be effected
causing serious machine damage.
6.2
The both roller bearing inner races (9 & 10) can now be pressed onto the shaft, do not mix the bearings up.
Starting at the rear end
6.3
Press the outer race of roller bearing (10) into position in the coverplate (3).
6.4
Ease coverplate assembly (2) onto the rotor/shaft (4), secure in place with any shims, angle ring (11) the
bearing retaining washer (7) and circlip (12). Check and set clearance.
6.5
Assemble the shaft seal (13) into the end cap (8).
6.6
The end cap (8) can now be fitted onto the coverplate assembly complete with the gasket (25) and any
appropriate shims taking care not to damage the seal lips on the shaft.
6.7
If coverplate gasket (24) has been replaced, it is essential that they are the same thickness as the
originals, otherwise internal clearances will be affected and could cause serious damage. Lightly smear the
gasket with oil before positioning onto cylinder (1).
6.8
With the cylinder (1) upside down on its flanges for ease of assembly (tape up or remove non return valve
(19) to save damage), lay the rotor/shaft assembly on the bottom of the cylinder.
6.9
Push coverplate assembly onto cylinder. Replace the six shakeproof washers and screws (32).
6.10
Drive in the location dowel (47).
6.11
Check rotor / cylinder clearance.
Reassembly Procedure
