Hydac SB 600 Bedienungsanleitung PDF herunterladen (Seite 3)

INNOVATIVE FLUID POWER

PN#02073469 / 07.14 / ACU1102-1326

Maintenance

3. Bottom Repairable Bladder Accumulators

3.1 Disassembly

A After removal from the system, place the accumulator in a vice or secure it to a workbench.

Remove valve protection cap (item 6) and unscrew valve seal cap (item 5). Attach the

proper HYDAC Charging and Gauging Unit and completely relieve the gas precharge

(refer to HYDAC Charging and Gauging brochure #02068202).

Remove gas valve core (item 3) by using the gas valve core tool.

B Unscrew vent screw

(item 19) and remove seal ring (item 20).

Unscrew lock nut (item 18 ) by using spanner wrench. Remove spacer ring (item 17).

If necessary, tap spacer ring with a plastic hammer to loosen.

C Loosen ﬂuid port (item 9) and push it into the shell. Remove back-up ring, (item 23)

where applicable, O-ring (item 16) and ﬂat ring (item 15) from ﬂuid port.

D Pull anti-extrusion ring (item 14) off ﬂuid port and remove it through ﬂuid side opening

by folding it in half.

E Remove ﬂuid port

(item 9).

F Remove bladder stem lock nut (item 4) and name plate (item 8) from the gas side.

Remove bladder (item 2) from ﬂuid side. It may be necessary to fold the bladder

lengthwise to remove it.

3.2 Inspection of Components

Shell:

• inside to ensure it is free of debris, rough spots, or chafe marks.

• ﬂuid side bore for damage which could hamper proper sealing.

• exterior for any sign of damage.

If any interior or exterior damage is found,

contact HYDAC for proper repair or replacement instructions.

Bladder:

The bladder must be checked for leakage. Reinstall gas valve core (item 3) and charge the

bladder with nitrogen or compressed air to its natural shape and inspect for leakage.

If leakage occurs, ﬁrst check the gas valve core (item 3) and replace it if necessary. If leakage

still occurs, then the bladder must be replaced. The bladder must be visually inspected for

lateral grooves and deep chafe marks. If any are found, the bladder should be replaced.

Shallow chafe marks are insigniﬁcant and will not hamper performance.

Note: Bladders can not be repaired or revulcanized!

Fluid Port:

Depress poppet and rotate 90° to ensure free movement. Visually inspect poppet,

threads, and sealing surfaces for any damage. If any damage is found, the ﬂuid port

should be replaced.

Vulcanized Anti-extrusion Ring:

Visually check vulcanized area between steel and rubber to make sure it is undamaged and

that adhesion is still good (no gaps between rubber and metal). If the adhesion is poor or the

rubber is cracked or shows signs of embrittlement or aging, replace anti-extrusion ring. Also

check the seat area on the steel parts for grooves or any other damage. If any are found

replace anti-extrusion ring.

Non-Vulcanized Anti-extrusion Ring:

Visually inspect area between the steel and rubber to make sure that the steel ring is

properly seated. If the rubber is cracked or shows signs of embrittlement or aging, replace

anti-extrusion ring. Also check the seat area on the steel parts for grooves or any other

damage. If any are found replace anti-extrusion ring.

Seals:

New seals should always be used whenever reassembling any bladder accumulator.

Other Parts:

Inspect for damage and replace if necessary.

1 2 3 4 5 6 7 8 9

Accumulators 1
Maintenance 2

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