Chain Lubrication - JLG sky trak mmv Service Manual

4. Start the engine and cycle the boom in and out
several times. With the boom horizontal, fully extend
the boom and then retract it 2" (51 mm) (one inch
per section). Turn the engine OFF.
5. Measure the chain sag. Acceptable boom chain sag
is between 1.5-2.5" (38-64 mm). If the measurement
is less than 1.5" (38 mm), repeat Steps 2-5 until the
sag is within acceptable range.
Note: If the top boom extend chain sag cannot be adjusted
within the acceptable range of 1.5-2.5" (38-64 mm), the
boom may require extensive adjustment and/or repair.
Contact the JLG Service Department or the nearest JLG
Authorized Service Center (ASC).
IMPORTANT: With the boom extended fully, apply
"LUBRIPLATE" Chain & Cable Fluid, "LPS3" or equiva-
lent or equivalent to the two extend chains.
6. Close the rear door.
Model MMV Rev. 12/04
General Information, Specifications and Maintenance
2.13.22
1 000
After inspection and before being returned to service,
chains must be lubricated with a quality chain lubricant
("LUBRIPLATE" Chain & Cable Fluid, "LPS3" or
equivalent).
The lubricant must penetrate the chain joint to prevent
wear. Applying lubricant to the external surfaces will
prevent rust, but the chains should be articulated to make
sure the lubricant penetrates to the working surfaces
between the pins and links.
To prepare the chain for lubrication, the chain plates
should be brushed with a stiff brush or wire brush to clear
the space between the plates so that lubricant can
penetrate to the working surfaces.
Lubricant may be applied with a narrow paint brush or
directly poured on, but the chain should be well flooded
with lubricant and the boom should be extended and
retracted to be sure that the lubricant penetrates to the
working surfaces. All surplus lubricant should be wiped
away from the external surfaces. DO NOT use a solvent
for this wiping operation.
Regular application of lubricant is necessary to make
sure that all working surfaces are adequately lubricated.
In extremely dusty conditions, it may be necessary to
lubricate the chains more often.
Lubrication of chains on vehicles working consistently in
extreme hot or cold conditions requires special
consideration. It is important that a reputable lubrication
specialist, an authorized JLG Authorized Service Center
(ASC) or the vehicle distributor be consulted for
guidance.

Chain Lubrication

MS21902 OM1480
2.67