JLG 740AJ Service Manual - Manual (Page 210)

SECTION 3 - CHASSIS & TURNTABLE
3-158 – JLG Lift – 3121160
Lubrication Guide
IT IS IMPORTANT THAT THE COMPRESSOR OIL BE OF A RECOM-
MENDED TYPE AND THAT IT IS INSPECTED AND REPLACED
TOGETHER WITH THE OIL AND AIR FILTERS, IN ACCORDANCE
WITH THIS MANUAL.
The result of poorly maintained lubricant and/or filters may
produce hazardous conditions resulting in ignition, which
could cause a fire in the sump. Damage to equipment and
serious bodily harm may result.
It is not possible to establish limits on all physical and
chemical properties of lubricants which can affect their
performance over a broad range of operating and environ-
mental influences. The responsibility for recommending a
suitable lubricant must rest with the user’s lubricant sup-
plier and their knowledge of the suitability of their lubri-
cants in screw compressors, operating in the particular
environment involved.
TYPES OF LUBRICANT TO BE CONSIDERED:
NOTE: Factory Fill - A.T.F. – Dexron® III or equivalent.
DO NOT MIX OILS OF DIFFERENT TYPES.
1. Automatic Transmission Fluids (i.e., Dexron® III):
Are suitable for the majority of applications. They are
commonly applied in heavy duty, high temperature
conditions and also where temperatures are consis-
tently below freezing (32°F [0°C]), down to approxi-
mately 0°F (-18°C).
In light load and/or high humidity operating condi-
tions A.T.F. can absorb moisture and may result in
emulsification of the lubricant. If this occurs change
lubricant immediately since the lubricating proper-
ties are breaking down. If this condition persists,
consider changing to a different type of lubricant
(consult supplier).
2. Industrial Type Oils: Should be of premium quality
non-detergent mineral oil, viscosity grade SAE20
ISO 68). Industrial oils may be better for high humid-
ity and/or low load factor, where condensed mois-
ture and emulsification may occur. Water will
separate and must be drained from the oil sump
(daily if necessary In addition to the primary oil char-
acteristics, good water separation is required.
These lubricants should be applied where condi-
tions above 32°F (0°C) prevail.
3. Synthetic Lubricants: In so far as know, all the elas-
tomeric components and metals used in the com-
pressor are fully compatible with Synthetic
Hydrocarbon (SHC) and Diester Lubricants. How-
ever, the synthetic lubricant should not employ Vis-
cosity Index Additives since, they could precipitate
out and cause plugging. Viscosity ranges selected
should be based on those outlined in Prime Charac-
teristics and in close liaison with the lubricant sup-
plier.
VARIOUS FACTORS CAN AFFECT ”EXTENDED LIFE” LUBRI-
CANTS, SUCH AS REACTIVE GASES OR VAPORS WHICH COULD
BE INGESTED INTO THE COMPRESSOR AND MAY ADVERSELY
AFFECT THESE LUBRICANTS. IT IS RECOMMENDED WITH THESE
LUBRICANTS TO MAINTAIN OIL FILTER CHANGES AT RECOM-
MENDED INTERVALS AND PARTICIPATE IN AN OIL SAMPLING
PROGRAM WITH THE LUBRICANT SUPPLIER.
Oil Filter Replacement
The compressor oil filter is a spin on, throw away type.
Before attempting to remove the oil filter, ensure all air is
relieved from the system.
USE ONLY ORIGINAL EQUIPMENT FILTERS, OTHER FILTERS MAY
NOT HAVE CORRECT PRESSURE RATING OR EVEN DIFFERENT
THREAD.
REMOVAL:
1. Remove old filter (use strap wrench if required) by
turning Anti-Clockwise and discard as appropriate
and in accordance with any pertinent regulations
2. Clean filter head with lint free wiper or cloth.
REPLACEMENT:
1. Apply a light film of oil to the seal surface on the new
element.
2. Screw new element on, clockwise by hand until seal
contacts filter head, then turn an additional 3/4 turn
(by hand).
Table 3-15. Prime Lubricant Characteristics
Viscosity 160 - 210 SUS at 100°F (38°C)
47 SUS or greater at 210°F (99°C)
Flashpoint 400°F (204°C) minimum
Pour point
Must be at least 20°F (-7°C) lower than
the lowest expected ambient operating
temperature
Contain Rust and Oxidation Inhibitors
Contain Foam Suppressors