jcb 1CX, Руководство по обслуживанию

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Section E Hydraulics
9803/8550
Section E
Issue 1
Pumps 12 - 9
Hydrostatic Pump
from machine no. 751012
Dismantling and Assembly
Following a complete rebuild of this pump it is necessary for
it to be set up on a dynamic test jig. Because of this it is
recommended that no dismantling work is carried out
beyond that covered in the following pages.
Shaft Seal
Removal and Replacement
1 Remove circlip 1.
Note: It may be necessary to press shaft 2 into the body
against spring force before the circlip can be removed.
When the circlip is removed, seal carrier 3 will move out
approximately 6 mm (0.25 in.) due to spring force.
2 Lightly tap the end of shaft 2 with a rubber mallet and
remove seal carrier 3.
Note: After the seal carrier has been removed, the shaft
2 and bearing assembly 4 are free in the body. Under no
circumstances should the shaft be removed as this
could cause loss of alignment of the pump internals
necessitating a total strip and rebuild. Such a procedure
is outside the scope of this Service Manual.
3 Remove O-ring 5 from seal carrier 3. Discard the O-ring.
4 Using a suitable press, press out lip seal 6 from the seal
carrier. Discard the lip seal.
5 Inspect seal carrier 3 for damage, and the sealing area
on shaft 2 for signs of rust, wear or contamination.
Polish the sealing area on the shaft if necessary.
6 Coat the outside diameter of new lip seal 6 with suitable
sealant. Press the lip seal into the shaft bearing side of
seal carrier 3, ensuring that the seal lip faces the shaft
bearing. Take care not to damage the lip seal.
7 Lubricate the inside diameter of lip seal 6 with petroleum
jelly.
8 Install new O-ring 5 onto seal carrier 3 and lubricate with
petroleum jelly.
9 Wrap the splined end of shaft 2 with thin plastic to
prevent damage to the lip seal during installation.
10 Slide seal carrier 3 over shaft 2 and press into position
in the pump body recess.
11 Holding inward pressure against shaft 2, refit circlip 1 to
secure the assembly.
12 - 9
S244910
2
4
6
5
3
1
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