JLG 600SC_660SJC Service Manual - Manual (Page 41)

SECTION 4 - BOOM & PLATFORM
3120898 – JLG Lift – 4-1
SECTION 4. BOOM & PLATFORM
4.1 PLATFORM
Platform Sections Replacement
The platform is made up of five sections: floor, right side,
left side, back (console box mounting.) and gate. The sec-
tions are secured with huck magna grip fastener and col-
lars. Replace damaged platform sections as follows:
1. Support the huck collar with a sledge hammer or
other suitable support.
2. Using a hammer and chisel, remove the collar from
the fastener as shown in the diagram below.
3. When installing new section of platform replace
huck fasteners with 1/4 x 20 NC x 2 1/4" grade 5
bolts, flatwashers and locknuts.
4. When installing a new gate to platform, replace riv-
ets with 1/4 x 20 NC x 2 “grade 5 bolts, flatwashers
and locknuts.
4.2 BOOM ROPE TORQUING PROCEDURES
Torque Procedures
1. Position boom in fully down and fully retracted posi-
tion.
2. Clamp both threaded ends of wire rope to prevent
rotation.
NOTE: Do not clamp on threads.
3. Install adjusting nuts (or remove nylon collar lock-
nuts if re-adjusting) to both retract and extend wire
ropes.
4. Torque retract adjusting nuts (platform end) to 15 ft.
lbs. (20 Nm) alternating between the two wire ropes
and keeping approximately the same amount of
thread beyond the adjusting nut.
NOTE: Do not allow wire rope to rotate. This may damage
the wire rope.
Figure 4-1. Platform Section Replacement
Figure 4-2. Dimensions of Boom Sections
Figure 4-3. Clamping Wire Ropes