15
NOTICE
Jack may start and run briefly in the following step, as
trapped air is expelled from the jack pneumatic system.
d. Depress and hold the pendant UP or DOWN button.
Continue holding button until jack air motor stops running.
Motor will usually stop after about 2 to 6 seconds, depending
on length of air supply hose.
e. Verify that there is no audible
“
air hiss
”
sound coming
from the jack.
f. Check the air pressure gauge on the jack filter/lubricator.
Verify that it indicates zero (0) psi/bar.
NOTICE
If any pressure is indicated on gauge, be certain that
air-shuto
ff
valve is in the CLOSED position and that air hose is
disconnected from air shut-o
ff
valve. Then, repeat steps 3d
through 3f.
Figure 17, Fully Extending the Cylinder
WARNING
Be certain that air supply hose is disconnected
and that air regulator pressure gauge indicates zero (0) psi/
bar before continuing with this procedure. Jack will start
immediately if air pressure is indicated on gauge, and either
pendant button is depressed. Lock nut and chain will begin
turning. Serious personal injury could occur if jack is started
while persons are performing lubrication procedures.
4. Raise the jack front access cover so that the cylinder threads
are exposed as much as possible. See Figure 18.
Figure 18, Lifting Front Access Cover to Expose Threads
5. Attach a lifting sling to the front access cover. Wrap the sling
around the anti-rotation plate and load cap, so that the cover
is held in the raised position. Be certain that the sling is strong
enough to support the weight of the cover (approximately 15
lbs [5,6 kg] ) and that it is securely fastened.
6. Perform the following inspection and lubrication tasks. See
Figure 19.
• Remove any loose dirt or debris from the chain drive
assembly.
• Check each chain tensioner to verify that it is applying
firm spring tension against the chain. If the tensioner does
not move freely, or if spring tension is weak, it should be
replaced. The tensioners are not adjustable or repairable.
• Check the tensioner rollers for obvious indications of wear
or damage. Replace rollers as required. The rollers are
available as a separate replacement part.
• Check all teeth on the lock nut and drive sprockets for
obvious indications of wear or damage. Replace these
parts as required.
NOTICE
Refer to Table 9 for gear oil specifications.
• Apply a film of SAE 80w-90 gear
oil [ISO 150] to the links
of the lock nut drive chain.
• At each tensioner, apply a small amount of SAE 80w-90
gear oil [ISO 150] to the exposed areas of the tensioner
pivot bushing, located under the tensioner retaining nut.
Some of the oil will flow past the bushing and onto the
tensioner pivot shaft. Removal of nut is not required.
Table 9 - Gear Oil Specifications - SAE 80w-90 [ISO 150]
(Use for lubricating cylinder threads, lock nut drive
chain, sprockets and tensioner pivot shaft.)
SAE Grade
80w-90
ISO Grade
150
Viscosity Index
103
Viscosity at 40
°
C, cSt
136
Viscosity at 100
°cSt
14.5
Flash Point.
°
C
202
Pour Point,
°
F
-30
NOTICE:
Specifications shown in this table are typical. Exact
specifications may di
ff
er slightly, depending on oil brand.
7. Remove any loose dirt or debris from the cylinder threads
and inspect the threads for obvious wear or damage. If the
old lubricant has dried-up, clean the threads with a brush
and some solvent before applying new lubricant.
8. Using an oil bottle with spout, apply two vertical streams
of SAE 80w-90 gear oil [ISO 150] on the exposed cylinder
threads, from top to bottom of cylinder. See Figure 20.
