SkyTrak 6036 Service Manual - Manual (Page 87)

3.47 Model 6036 Legacy
Boom
b. Chain Lubrication
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 the 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.
c. Boom Chain Tension Check
1. Start the engine. Place the travel select lever in (N)
NEUTRAL, move the neutral lock lever to the
NEUTRAL LOCK position and engage the parking
brake switch.
2. With the engine at idle, purge all air from the hydraulic
system by slowly raising and lowering the boom
several times. Raise the boom to a horizontal (level)
position.
3. Slowly extend the boom, and retract it about halfway.
Fully extend the boom, then retract it 2" (51 mm)
(one inch per section). Turn the engine OFF.
4. Measure the sag in the top boom extend chains
(Fig. 3 -101, 1) between the bottom of the extend
chains and the top of the intermediate boom at their
closest point (2). Acceptable boom chain sag (3) is
between 1.5" (38 mm) and 2.5" (64 mm). If the
measurement is less than 1.5" (38 mm), the boom
chains need to be adjusted.
Figure 3-101 Measure the Extend Chain-to-Top of
Intermediate Boom Sag at the Closest Point
OA0491
1
2
3