REED 00 C50SS, Manual, Page: 79 / 84

REED
00 MODEL:
C50SS
TRAILER CONCRETE PUMP
MAINT
PAGE 49
INCREASE PRE-CHARGE PRESSURE
In checking the pre-charge pressure if it is found to be too low then add nitrogen gas as
follows:
•
Install gauging unit as previously described. Turn “T” handle clockwise until needle on
gauge begins to move then from this point turn it another full turn.
USE DRY NITROGEN GAS ONLY - NEVER USE
OXYGEN OR AIR. THIS COULD CAUSE AN
EXPLOSION.
•
Connect the charging hose to the cap screw adapter and to the nitrogen bottle
discharge. It is recommended that the commercial nitrogen bottle be equipped with
a regulator to adjust pressure. Full pressure may damage gauge.
•
Open the shut-off on the nitrogen bottle and slowly fill the accumulator. Charging
too quickly may damage the accumulator.
The gauge on the gauging unit during pre-charge
registers the incoming line pressure and not
necessarily the accumulator pressure while
charging.
•
The accumulator pressure can be checked by first closing the shut-off valve on
nitrogen bottle.
•
Allow a few minutes for the temperature and pressure in the accumulator to
stabilize.
•
Check the accumulator pressure as previously described, then fill or release
pressure as required.
•
Close shut-off valve on the nitrogen bottle. Turn “T” handle counterclockwise to
close gas valve.
•
Open bleed valve, disconnect charging hose and remove gauging unit from
accumulator. Reinstall hex cap and protective cap.
REVISION: