F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
4 L
UBRICATION
PAGE 4-9
There are many spin on filters that will fit an Ariel compressor, but very few meet the filtration
ratings of Ariel filters. For this reason, Ariel does not recommend after market filters. Exer-
cise caution if an after market filter is installed.
Pressure gauges are provided for monitoring pressure drop across the filter. Differential
pressure is the primary indication of a plugged filter.
Compressor Prelube Pump
An automated compressor pre-lube system is strongly recommended for all Ariel compres-
sors to extend bearing life and reduce operating costs. Compressors that meet any of the
following criteria are required to have an automated pre-lube system to provide oil flow prior
to start-up:
1. Electric motor driven compressors.
2. Unattended-start compressors, regardless of driver type.
3. All large frame compressor models (JGC, JGD, JGZ, JGU, JGB, JGV, KBB and KBV).
Automated compressor pre-lube systems must be designed and sized to provide 10 psig
(0.7 bar
g
) minimum pressure for a minimum of 30 seconds prior to starting, at the inlet to the
oil gallery (after the filter), with minimum start-up oil viscosity and maximum allowable filter
differential pressure. It is suggested that the prelube pump be sized at approximately 25% of
the frame oil pump capacity. Reference Technical Manual, Section 1, Frame Specification
Tables for frame oil pump flow rates, or see the Electronic Databook in the Ariel Perfor-
mance Program. The purpose is to be sure there is oil flow to all bearings and bushings, and
the clearances are filled with oil prior to start-up. A start permissive is desirable to sense for
minimum required pressure/time at the inlet to the oil gallery.
Automated systems are to provide for shutdown if 35 psig (2.4 bar
g
) oil pressure is not
achieved within 10 seconds after the initiation of start-up (from when crankshaft starts to
turn).
If a compressor will not start or shuts down at start-up due to low oil pressure,
do not attempt to re-start until the cause of low pressure is corrected.
Engine driven compressors with manual pre-lube pumps are to be adequately pre-lubed
prior to starting. If 35 psig (2.4 bar
g
) oil pressure is not achieved within 10 seconds after
reaching engine idle speed, shutdown the compressor and correct the cause. Repeat man-
ual pre-lube prior to each cranking for start-up.
Pre-lube pumps are to be located prior to the oil filter. When oil pressure exceeds 35 psig
(2.4 bar
g
) at start-up, a low oil pressure shutdown set at 35 psig (2.4 bar
g
) must be active for
all compressors.
Oil Heaters
Frame oil heaters may be needed if the compressor must be started in cold weather applica-
tions. Depending on the operational aspects of the compressor, one possible heating mode
is to maintain the temperature in the compressor frame to a minimum temperature so that
the compressor can be started immediately if needed, see Table 4-4. Another mode is to
