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Figure 6-5. Air pressure regulator assembly, disassembly and reassembly.
Figure 6-6. Oil filter-thermal bypass valve assembly, removal and installation.

TM-5-4310-354-14 Compressor Rotary; Air Skid Mounted; Diesel Engine 125 CFM 100 PSIG (Davey Model 6M125) Manual
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TM 5-4310-354-14
(1) With air discharge service valves closed,
(4) Readjust regulator adjusting screw, as
and engine operating at idle speed, adjust
necessary.
air pressure regulator adjusting screw (5,
figure 6-5) to obtain a reading of 115-117
(5) Cycle the air compressor several times by
2
psi (8.08-8.54 KG/CM ) on air pressure
opening and closing the air discharge
gauge.
service valve.
Observe air pressure
gauge each time to ensure pressure
(2) If air pressure rises above 117 psi (8.54
setting remains stable.
2
KG/CM ),
turn
adjusting
screw
counterclockwise to decrease pressure, if
(6) Tighten nut (4, figure 6-5) to secure
2
below  115  psi  (8.08  KG/CM )  turn
adjusting screw after pressure is set.
clockwise to raise pressure.
(3) Bleed off excess air by opening air
discharge service valve. After excess air
is discharged, close service valve.
Section III. OIL FILTER-THERMAL BYPASS VALVE ASSEMBLY
General.  The thermal bypass valve portion of
Between these two temperatures, hot and cool oil is
6-8.
this assembly provides rapid warming of the compressor
being mixed to maintain a relatively constant minimum
at initial start by directing oil flow from the oil separator
operating temperature.
assembly, through the compressor oil filter, into the
compressor (figure 5-2).  When the oil temperature
6-9.
Oil Filter-Thermal Bypass Valve Assembly.
reaches  approximately  150 F  (66C),  the  thermal
a. Removal. Remove the oil filter-thermal bypass
bypass valve begins to open and directs part of the oil
valve assembly as shown in figure 6-6.
through the oil cooler before it enters the oil filter.  At
approximately 180F (82C), the thermal bypass valve is
fully open and all oil flow is through the oil cooler.
6-10






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