AirMan PDS185S-6C1, Service Manual

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2. Maintenance
2-3
2.3 How to adjust regulator and how to replace diaphragm
2.3.1 Method of adjustment
When adjusting regulator system, install a silencer to the air delivery
port and wear earplugs for protection of hearing damage.
The speed regulator is already adjusted prior to delivery ex.works. Never change the setting of
the regulator by turning bolt and rod recklessly.
If it is necessary to re-adjust the speed regulator due to overhauling or any trouble, adjust it in
accordance with the following procedures.
PDS185S-6C1 (VE PUMP Type)
＜
Adjustment procedure
＞
(For engine speed and pressure, see 1.2)
①
Adjust the length of the rod connecting speed regulator so that engine governor lever can be pulled
toward high speed side, with compressor kept stopping. (Making the rod length short, engine
speed increases.)
Make adjustment so that such a little clearance which will never touch each other should be
reserved between the high speed side stopper and engine governor lever. With both stopper and
lever kept in contact, power will be loaded on the shaft of lever side to cause damage and trouble.
But it is not necessary to adjust unloaded operation speed.
②
Adjust this system so that when unload starting pressure exceeds 100psi (0.69MPa) by turning
pressure adjusting screw, speed regulator can start to function to lower engine RPM.(Tightening
the screw, the pressure rises, and loosening it, the pressure drops.)
Pressure adjusting screw
Pressure regulator
Speed regulator
Clearance
Engine
governor lever
Rod
High
speed
L
Low
speed
High speed side
stopper
PC08020-1
PC08021
Operation with compressed air supply port opened is prohibited
D003
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