Charging The Accumulator - Stanley MB256 User Manual

The tools required to charge the accumulators are
the 505232 Charge Hose Assembly and the 28257
accumulator tester, which are used with other
STANLEY model breakers. When charging the
accumulators, make sure the tools and charge valves
are clean. Dirt can contaminate the charge valves and
cause leakage.
1. Remove the protective plug from the accumulator
charge valve.
Note: There are three accumulators on this breaker;
the main accumulator, the manifold accumulator
and the surge accumulator.
2. Hold the chuck end of the tester and turn the gauge
fully counter clockwise to ensure the plunger inside
the chuck is completely retracted.
3. Screw the tester into the breaker charge valve
by turning the chuck. Do not use the gauge for
turning as this will advance the plunger in the
chuck. Tighten the chuck lightly against the breaker
charge valve.
4. Turn the gauge clockwise to advance the plunger
until a pressure is indicated on the gauge. Do not
28257 Tester
Main Accumulator

CHARGING THE ACCUMULATOR

CHARGE PRESSURE SPECIFICATION
Main Accumulator: 350 PSI +/- 20 PSI - 24 BAR +/- 1.4 BAR
Manifold Accumulator 300 PSI +/- 20 PSI - 21 BAR +/- 1.4 BAR
Surge Accumulator 1000 PSI +/- 20 PSI - 69 BAR +/- 1.4 BAR
Surge Accumulator
Figure 12. Charge Pressure Specification For the MB256
overtighten.
5. If the pressure is correct, unscrew the gauge to
retract the plunger. Then, loosen and remove the
tester from the charge valve. If the pressure is not
correct, proceed to step 6.
Note: When disengaging the tester a "POP" of
nitrogen is normal.
6. Connect the charge hose assembly to the charging
valve on the tester. Make sure the valve on the
charge hose assembly is closed. Open the valve
on the nitrogen bottle.
7. Very slowly open the valve on the charge hose
assembly and slowly meter the nitrogen into the
breaker charge valve until the tester reads the
correct charge pressure.
8. When the correct pressure is obtained, close the
valve on the charge hose assembly and on the
nitrogen bottle. Unscrew the gauge to retract the
plunger. Loosen and remove the tester from the
charge valve. Before replacing the protective plug,
inspect the plug O-ring. If damaged or deformed,
replace the plug. Apply Loctite™ 242 to plug and
cap.
Manifold Accumulator
Nitrogen Bottle (locally obtained)
505232 Charge Hose
Assy (includes gauge,
valve, hose and charge
valve adapter)
MB256 User Manual ◄ 17