JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
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3. Be careful while you seal the drive shaft, use an adhesive
tape.
4. Assemble the sealing ring, fitting tool holds the correct
position of the sealing ring in the pump housing.
5. Assemble the snap ring.
6. Assemble the snap ring in the correct position.
NOTE: This description shows how to change the drive shaft seal-
ing ring but isn’t the way of serial assembly. the sealing ring
is assembled together with the taper roller bearing from
inside the pump housing normally to get a secure condi-
tion. If you decide to repair the pump in the shown way be
very careful while handling so that the drive shaft will not
be damaged during disassembly of the shaft sealing ring.
Disassembly
1. Disassemble the pilot valve.
2. Mark the position of the port plate and remove the
socket screw of the port plate.