JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-118 3121234
3.19 SWING MOTOR (SN 0300134352 TO
0300189341)
Disassembly
1. Place the Torqmotor™ in a soft jawed vice, with coupling
shaft (12) pointed down and the vise jaws clamping
firmly on the sides of the housing (18) mounting flange
or port bosses. Remove manifold port o-rings (18A) if
applicable.
IF THE TORQMOTOR™ IS NOT FIRMLY HELD IN THE VISE, IT COULD BE DIS-
LODGED DURINGTHE SERVICE PROCEDURES, CAUSING INJURY.
2. Scribe an alignment mark down and across the Torqmo-
tor™ components from end cover (2) to housing (18) to
facilitate reassembly orientation where required. Loosen
two shuttle or relief valve plugs (21) for disassembly
later if included in end cover. 3/16 or 3/8 in. Allen
wrench or 1 in. hex socket required.
3. Remove the five, six, or seven special ring head bolts (1)
using an appropriate 1/2 or 9/16 in. size socket. Inspect
bolts for damaged threads, or sealing rings, under the
bolt head. Replace damaged bolts.
4. Remove end cover assembly (2) and seal ring (4). Discard
seal ring.
NOTE: Refer to the appropriate “alternate cover construction” on
the exploded view to determine the end cover construction
being serviced.