jcb JS300 Service Manual page 807

Fig 34.
17 Fit a new O-ring 472, lightly greased, to valve housing
303.
Fig 35.
18 Lining up the match marks made during dismantling,
install valve housing 303 on main housing 301 and
secure with socket head screws 401 tightened to a
torque of 628 Nm (463 lbf ft).
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19 Into valve housing 303 fit plunger 351 followed by
spring 355. Check that the plunger moves freely in its
guide. Fit a new O-ring 488, lightly greased, to plug
469 and tighten to a torque of 220 Nm (163 lbf ft).
20 Fit a new back-up ring 162 and O-ring 161 to relief
valve 51. Screw the relief valve into valve housing
303 and tighten to a torque of 176 Nm (130 lbf ft).
9813/5100-1
Section E - Hydraulics
Swing Motor
Dismantling and Assembly
Fig 36.
Fig 37.
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