INLET PRESSURE gauge. Indicates the pump inlet pressure from minus 20 psi (minus 138 kPa) to plus 600 psi
THERMOMETER. Used to determine ambient temperature for nitrogen pressurization. Mounted on rear of scale
column. i 3.
NITROGEN REGULATOR. Used to set correct nitrogen pressure according to ambient
TARE KNOB. Used to zero scale dial prior to filling extinguisher cylinder with Halon.
SCALE. Shows weight of Halon placed in extinguisher cylinder to avoid overfill.
EXTINGUISHER HOSE valve. Position allows or stops flow to or from the extinguisher cylinder.
OUTLET PRESSURE gauge. Indicates pump outlet pressure from 0 to 2000 psi (0-13789 kPa).
AGITATOR BRACKET. Provides mounting for extinguisher cylinder adapters. Secures extinguisher cylinder
during recovery and charging operations. Used to shake extinguisher after nitrogen pressurization to achieve a
stabilized extinguisher pressure reading.
AIR FILTER / REGULATOR. Connection point for external compressed air source needed to drive transfer unit
pump air motor. Regulator controls air pressure to air motor and filter removes water or other contaminants that
could damage motor.
UNIT OPERATION valve. Position determines unit function in either recovery or recharge of extinguisher cylinder.
HALON / NITROGEN valve. Position determines if flow is through the pump. HALON position also used to direct
flow to the recovery cylinder.
PUMP valve. Position determines if pump is ON or OFF.
HALON HOSE valve. Position allows or stops flow from the Halon cylinder or to the recovery cylinder.
HALON CYLINDER ADAPTER WITH GAUGE (O to 1000 psi) (0-6895 kPa). Acts as interface between the
cylinders and hoses and when on the recovery cylinder indicates pump pressure required to force Halon/nitrogen
mix into the recovery cylinder.
SECTION II. OPERATOR PREVENTIVE MAINTENANCE CHECKS AND
Operator Preventive Maintenance Checks and Services (PMCS) are performed to be sure the Recovery /
Recharger Unit is ready for use at all times. These checks and services help you find and fix defects before the
Recovery / Recharger Unit is damaged or fails.
If minor defects are found while the Recovery / Recharger Unit is operating, take notes on the cause and effect of
each defect. Fix or have each defect fixed after you have stopped operating the Recovery / Recharger Unit.
Record all defects and steps taken to fix them as soon as possible. See DA PAM 738-750.