JLG Triple-L Operator Manual - Manual (Page 43)

SECTION 4 - SERVICE AND MAINTENANCE
3121224 – Triple-L-Trailer – 4-3
Trailer Structure
Because the trailer floor receives the most abuse, it will
most likely corrode before any other part of the structure.
Using a power washer and a detergent solution, wash the
floor and walls of the trailer. Rinse the trailer floor and
walls.
Fasteners and Frame Members
Inspect all of the fasteners and structural frame members
for bending and other damage, cracks, or failure. Repair
or replace any damaged fastener and repair the frame
member. If you have any questions about the condition or
method of repair of fasteners or frame members, get the
recommendation of, or have the repair done by, your
dealer.
The various fastener types used on your trailer are:
• Bolts, which are used mainly for attaching door and
gate hinges to the trailer body.
• Buck Rivets, which are used to attach the sides and
roof panels of the body to each other, and to the frame
of the trailer.
• Huck Bolts may be at various locations on the sub-
frame. Huck bolts are not user serviceable. If you
detect a loose huck bolt fastener, do not tow the trailer.
Call your dealer for instructions.
INSPECT FOR BROKEN OR DAMAGED FASTENERS, WELDS OR
OTHER DAMAGED PARTS AT LEAST ONCE A YEAR AND HAVE
ALL DAMAGED PARTS REPAIRED OR REPLACED.
Welds
All welds can crack or fail when subjected to heavy loads
or movement of cargo that was not properly tied to pre-
vent movement. Any time that you know or suspect that
the trailer has been subjected to heavy loads or move-
ment of cargo, immediately inspect the welds and fasten-
ers for damage. To prevent severe damage to your trailer,
inspect all of the welds for cracks or failure at least once a
year.
DO NOT REPAIR CRACKED OR BROKEN WELDS, CONTACT JLG.
Hydraulic Cylinder
The cylinder is a single acting cylinder designed to bleed
fluid back to the tank during the lowering of the trailer
deck. The air breather relieves vacuum buildup during the
extend stroke. Routine maintenance of the cylinder should
not be required however the seals can be replaced should
a leak ever occur.
NOTE: When the deck is lowered (cylinder extended) the
reservoir is at it’s highest level. The oil level should
be checked at this point. The oil level should be
within 1/2 inch of the top when the deck is fully low-
ered.