JLG 600SC_660SJC Service Manual - Manual (Page 31)

SECTION 2 - GENERAL
3121607 – JLG Lift – 2-5
2.5 PINS AND COMPOSITE BEARING REPAIR
GUIDELINES
Filament wound bearings.
1. Pinned joints should be disassembled and inspected if
the following occurs:
a. Excessive sloppiness in joints.
b. Noise originating from joint during operation.
2. Filament wound bearings should be replaced if any of
the following is observed:
a. Frayed or separated fibers on the liner surface.
b. Cracked or damaged liner backing.
c. Bearings that have moved or spun in their housing.
d. Debris embedded in liner surface.
3. Pins should be replaced if any of the following is
observed (Clean pin before inspection):
a. Detectable bearing area wear.
b. Flaking, peeling, scoring, or scratches on pin surface.
c. Rusting of pin in bearing area.
4. Re-assembly of pinned joints using filament wound
bearings:
a. Blow out housing using compressed air to remove
all dirt and debris. Bearings and bearing housings
must be free of all contamination.
b. Clean bearings and pins with solvent to remove all
grease and oil.
NOTE: Filament wound bearings are a dry joint and should not be
lubricated unless otherwise instructed (i.e. sheave pins).
c. Inspect pin to ensure it is free of burrs, nicks, and
scratches which can damage bearing during instal-
lation and operation.
2.6 WELDING ON JLG EQUIPMENT
NOTE: This instruction applies to repairs, or modifications to the
machine and to welding performed from the machine on
an external structure, or component,
Do the Following When Welding on JLG Equipment:
• Disconnect battery.
• Disconnect moment pin connection (where fitted)
• Ground only to structure being welded.
Do NOT Do the Following When Welding on JLG
Equipment:
FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN COMPO-
NENT DAMAGE (I.E. ELECTRONIC MODULES, SWING BEARING, COLLECTOR
RING, BOOM WIRE ROPES ETC.
• Do NOT ground on frame and weld on any other area than
chassis.
• Do NOT ground on turntable and weld on any other area
than turntable.
• Do NOT ground on platform/support and weld on any
other area than platform/support.
• Do NOT ground on a specific boom section and weld on
any other area than that specific boom section.
• Do NOT allow pins, wear pads, wire ropes, bearings, gear-
ing, seals, valves, electrical wiring, or hoses to be between
grounding position and welded area.