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Maintenance
Maintenance
Schedule
Procedure
Check Accumulator Pre-Charge
Check Tightness of all Clamps and
Fittings
Check Hoses for Wear
Check Hydraulic Fluid and Filter
NOTICE
Recommended Hydraulic Oil
Use Graco-approved Hydraulic Oil, Part No. 169236
(5 gal) or 207428 (1 gal)) or a premium, ISO grade
46 petroleum-based hydraulic oil containing rust
and oxidation inhibitors and anti-wear agents.
Before using any other type of oil in this motor, con-
tact your Graco distributor. Unauthorized use of
lesser grade oil or substitutes may void the war-
ranty.
Hydraulic Oil Working Temperature
The maximum hydraulic oil operating temperature is
180 °F (82 °C). The motor seals will wear faster and
leakage may occur if the pump is operated at higher
oil temperatures.
If the hydraulic oil temperature approaches 180 °F
(82 °C), check the hydraulic fluid supply cooling sys-
tem, filters, etc. and clean or repair as needed.
Keep the hydraulic system clean
To reduce the risk of damaging the hydraulic driver,
verify that the hydraulic power supply fluid lines and
reservoir are clean and free from contaminants.
Carefully follow the manufacturer's recommenda-
tions on reservoir and filter cleaning, flushing, and
periodic changes of hydraulic fluid.
Always plug the hydraulic inlets, outlets and lines
when disconnecting them to avoid introducing dirt
and other contaminants into the system.
22
Check the Accumulator Pre-Charge
Graco Charging Harness (part no. 124217) can be pur-
chased to aid in quick charging of the accumulator.
1. Turn off main power and lockout.
2. Bleed the accumulator charging valve hydraulic
Frequency
pressure to zero. See Pressure Relief Procedure,
Weekly
page 21.
Weekly
3. Connect the charging harness to the accumulator.
Monthly
4. Check the reading on the nitrogen harness pressure
6 months
gauge. If the pressure is below 1200 psi, then
Pre-Charge the Accumulator to 1200 psi.
Pre-Charge the Accumulator
During this procedure the nitrogen bottle, the accu-
mulator, and the charging harness will all be under
significant pressure. Use dry nitrogen gas only.
1. Check the Accumulator Pre-Charge.
2. Connect the other end of the harness to the nitrogen
bottle. Slowly open the nitrogen bottle valve while
observing the pressure gauge.
3. When the1200 psi is reached, close the nitrogen
valve.
4. Open the bleed valve on the charging harness to
relieve residual pressure in the charging harness.
5. Remove the charging harness and replace the bot-
tle guard.
NOTICE
3A0238G
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