jcb JS300 Service Manual page 803

Assembly
1 Position main housing 301 on a bench with the flange
for valve housing 303 uppermost.
2 Take output shaft 101 and fit stop ring 432 and spacer
106 at the splined output end. Shrink fit bearing 443
to the output shaft with annulus A against the spacer.
3 If renewing bearing 444, shrink fit inner race to the
output shaft, followed by stop ring 433.
4 Install the output shaft assembly into main housing
301. Tap the outer casing of bearing race 443 using a
copper bar until it is fully seated.
Fig 19.
Fig 20.
E-142
5 Using a suitable jig, install a new oil seal 491 into front
cover 304. Make sure the oil seal is installed the right
way round (see Dismantling, step 17).
6 Apply a little grease to the lip of oil seal 491 and new
O-ring 471. Cover the spline of output shaft 101 with
tape and then install front cover 304 carefully by
tapping gently with a plastic hammer at different
positions all round the outside edge.
7 Secure front cover 304 with snap ring 437.
8 Position main housing 301 horizontally on the bench.
Smear shoe plate 124 with grease and then install
with its large chamfered side against the housing.
9 Take cylinder block 111 and fit push rod 116.
Assemble spacer F 117 to spherical bush 113 and fit
the assembly to the cylinder block.
10 Fit the piston 121/shoe 122 assemblies to retaining
plate 123. Fit the resulting assembly over the spline
of output shaft 101.
9813/5100-1
Section E - Hydraulics
Swing Motor
Dismantling and Assembly
Fig 21.
E-142