HYDAC SB 600 - Manual (Page 4)

INNOVATIVE FLUID POWER 26
PN#02073469 / 07.14 / ACU1102-1326
Maintenance
3.3 Assembly:
The interior of the shell must be absolutely free of any contamination or
debris prior to assembly.
Prepare bladder for installation by removing
valve seal cap (item 5) , and
gas valve core (item 3) . Press all residual air out of bladder.
G Lubricate interior of shell and exterior of bladder with appropriate filtered fluid, using a
fluid volume of approximately 10% of total accumulator volume.
(Do not use water, it is not a lubricant) .
Different bladder compounds require different lubricants.
H Place bladder stem lock nut (item 4) over the pull rod with the male threads facing
the pull rod handle. Insert bladder pull rod through shell
(threaded connection toward fluid side opening) .
Thread pull rod onto gas valve. Fold bladder in half lengthwise, then again if necessary.
Pull the pull rod until gas valve emerges through gas port opening. Make sure bladder
is stretched and not twisted when being inserted. Once gas valve is through opening,
loosely attach bladder stem lock nut (item 4) to prevent bladder from slipping back into
shell. Remove pull rod from gas valve.
Insert gas valve core (item 3) and torque to 0.5 Nm (0.4 lb-ft).
I To prevent damage to the threads and O-ring, tape fluid port threads before assembly.
Insert fluid port into shell. Make sure bladder is fully extended within the shell.
J Fold anti-extrusion ring (item 14) in half and insert into shell with steel seat facing fluid
side opening. To do this, push fluid port further into shell and then pull it back through the
middle of the anti-extrusion ring.
K Slightly pull on the fluid port to position it. Do not allow fluid port to fall back into shell.
This can be accomplished by either pulling on the fluid port while inserting seals or
precharging the bladder with 10 to 15 psi of dry nitrogen to keep fluid port in position
(refer to HYDAC Charging and Gauging brochure #02068202) .
L Order of Assembly:
flat ring item 15
O-Ring item 16
back-up ring (where applicable) item 23
spacer ring item 17
fluid port lock nut item 18
G
L
I
K
H
J