SK47 User
Manual ◄ 13
ACCUMULATOR TESTING
PROCEDURE
To check or charge the accumulator the following
equipment is required:
31254 Charge Kit: which includes the following (see
Figure 2).
•
Accumulator Tester (Part Number 02835).
•
Charging Assembly (P/N 15304) Includes a liquid
filled gauge w/snub valve, hose and charge fitting.
•
NITROGEN bottle with a 800 psi/56 bar minimum
charge (NOT included in 31254 Charge Kit.)
1.
Remove the valve cap assembly from the sinker drill
(see Figure 2 for location).
2.
Remove the protective cap and loosen the 5/8-inch
hex locking nut on the tool charging valve 1-1/2
turns.
3. Holding the chuck end of Accumulator Tester (P/N
02835) turn the gauge fully counterclockwise to
ensure that the stem inside the chuck is completely
retracted.
4. Thread the tester onto the accumulator charging
valve. Do not advance the gauge-end into the
chuck-end. Turn as a unit. Seat the chuck on the
accumulator charging valve and hand tighten only.
5.
Advance the valve stem of the tester by turning the
gauge-end clockwise until a pressure is read on the
gauge (charge pressure should be 600–700 psi/42–
48 bar).
6. If pressure is OK, unscrew the gauge-end from the
chuck to retract the stem, then unscrew the entire
tester assembly from the accumulator charging
valve. If pressure is low, charge the accumulator as
described in the following paragraph.
7.
Tighten the 5/8-inch hex locking nut on the tool
charging valve. Be careful not to overtighten. Install
the protective cap and valve cap assembly.
ACCUMULATOR CHARGING
1.
Perform Steps 1 through 4 of the accumulator
testing procedure above.
2.
Connect the chuck of the charging assembly to
the charging valve on the accumulator tester or, if
preferred, remove the tester from the charging valve
and connect the charging assembly chuck directly to
the charging valve.
3. Adjust the regulator to the charging pressure of 600
psi/42 bar.
Note: It may be necessary to set the gauge at 650-
700 psi/45-48 bar to overcome any pressure drop
through the charging system.
4. Open the valve on the charging assembly hose.
5.
When the accumulator is fully charged close the
valve on the charging assembly hose and remove
the charging assembly chuck from the accumulator
tester or tool charging valve.
6.
If the accumulator tester has been used, be sure to
turn the gauge-end fully counterclockwise before
removing the tester from the charging valve of the
tool.
7.
Tighten the 5/8-inch hex locking nut on the tool
charging valve and replace the protective cap.
8.
Replace the valve cap assembly.
CHARGING THE ACCUMULATOR
