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l. Apply a heavy amount of Cat Multipurpose Grease (MPGM) to all outside parts that
move, such as rod threads, ball joints, linkage.
m. Install moisture barrier (plastic sheeting) on inlet air panels and louvers, cooling air
outlet grill and bleed-off silencer. Ensure all covers are airtight and weatherproof. Use
a waterproof weather resistant tape such as Kendall No. 231 or an equivalent. Do not
use duct tape. Duct tape will only seal for a short time.
n. Fill the DEF tank with DEF that meets all requirements defined in “ISO 22241-1”.
o. Completely fill the coolant system to abate corrosion.
p. Install silica gel desiccant bag in the 1
st
stage discharge and 2
nd
stage suction piping.
q. Place silica gel desiccant bags inside compressor cabinet and electrical enclosure.
r. Place warning label on front of unit stating: "CAUTION: Remove silica gel packs and
moisture barriers, change oil, and replace drain plugs before restarting unit."
s. Under most conditions, removing the batteries is the best procedure. As an
alternative, place the batteries in storage. As needed, periodically charge the
batteries while the batteries are in storage. If the batteries are not removed, wash the
tops of the batteries until the tops are clean. Apply an electrical charge to the
batteries in order to obtain a specific gravity of 1.225. Disconnect the battery
terminals. Place a plastic cover over the batteries. Note: For additional information,
refer to Special Instruction, CAT Publication SEHS7633, “Battery Test Procedure”.
t. Loosen all belts.
u. Replace silica gel packs every 2 months.
v. Rotate engine and compressor at least two rotations manually every month.
8. Typical Operating Conditions
8.1 Operating Temperatures and Pressures
Many factors can affect operating temperatures and pressures and acceptable normal
operating conditions can not be defined for every compressor installation. Gear
arrangement, operating set points, ambient conditions at installation location and
elevation, etc., can all affect running conditions. For example, rapid load cycling will
result in lower operating temperatures, installation at high elevation results in lower
pressures and may increase operating temperatures.
For diagnostic purposes it is best to periodically record operating temperatures and
pressures. A minimum of once daily is recommended. Do not depend on one set of
readings to diagnose a problem. It is best to establish a baseline and examine the data
for trends that can not be explained by normal changes of conditions external to the
compressor. Especially look for simultaneous changes to more than one reading. For
convenience, the compressor HMI may be provided with trend charts or data logging
capability (see Description of Operations for your application). Factory test readings are
available for comparison to site readings. Contact your local distributor for more
information.
Pressures and temperatures shown are typical for an average compressor installation.
Ambient temperature 70°F, 500’ elevation. Set 125 PSIG unload to 115 PSIG load,
operating 75% loaded.