14 ► HD45 User Manual
5.
If the underwater model is to be used at depths
greater than 300 ft/91 m, increase the accumulator
charge 40 psi/3 bar for each 100 ft/30 m of depth to
oset water pressure.
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. Replace the valve cap assembly.
GENERAL SERVICE NOTES
1. If the hammer drill is repainted after servicing, be
sure to mask o the vent in the valve cap assembly.
Do not allow paint to enter the IN and OUT ports or
the bore of the motor assembly.
2. If the handle grips need to be replaced.
a. Remove the old grips and clean the handle.
b. Wash the new grips and the handle. Push the
drive grips on. DO NOT lubricate the parts. The
grips will not be secure on the handle if grease
or oil is used.
ACCUMULATOR TESTING
PROCEDURE
To check or charge the accumulator the following
equipment is required:
31254 Charge Kit: which includes the following.
Accumulator Tester (Part Number 02835).
Charging Assembly (Part Number 15304).
(P/N 15304 includes a liquid lled gauge with snub
valve, hose and ttings.)
NITROGEN bottle with 1000 psi/70 bar (min.) charge.
1. Remove the valve cap assembly from the hammer
drill.
2. Holding the chuck end of Accumulator Tester
(Part Number 02835) turn the gauge fully
counterclockwise to ensure that the stem inside the
chuck is completely retracted.
3. 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.
4. 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 500-700 psi/34-
48 bar).
5. 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 procedure.
6. Install the protective 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 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.
CHARGING THE ACCUMULATOR
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