If any interior of exterior damage is found, contact Paul Wever Construction Equipment Co., Inc. for proper repair or replacement instructions.

Bladder:
The bladder must be checked for leakage. Reinstall gas valve core 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 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.

Anti-extrusion Ring:
VULCANIZED VERSION:
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 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.
NON-VULCANIZED VERSION:
Visually check 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.

Other Parts:
Inspect for damage and replace if necessary.

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 and gas valve core. Press all residual air out of bladder.

G. Lubricate interior of shell and exterior of bladder with appropriate filtered fluid. Different bladder compounds require different lubricants.
H. Place lock nut over the pull rod with the male threads facing the pull rod handle. Insert bladder pull rod through shell. 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 lock nut to prevent bladder from slipping back into shell. Remove pull rod from gas valve. Insert gas valve core 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 shell.
J. Fold anti-extrusion ring 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 middle of 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.

L. Order of Assembly:
......flat ring
......O-ring
......back-up ring
......spacer ring
......lock nut
M. Insert flat ring into space between fluid port and shell. If it does not slide on properly, recenter fluid port in opening. Next, insert O-ring by pressing with a blunt flathead screwdriver (with rounded edges) at 90 degree intervals. Carefully, level O-ring onto seat.
Where applicable insert back-up ring over O-ring with grooved surface towards O-ring.
N. Remove protective tape from fluid port threads. Insert spacer ring with "lip" placed in the shell. Thread on lock nut and torque with spanner wrench. Place seal ring on vent screw install in fluid port and torque.
O. On gas side, remove loosely attached lock nut and position name plate. Reapply lock nut and torque.
P. Attach appropriate charging and gauging unit and apply proper gas precharge .
Q. Screw on valve seal cap and torque. Screw on valve protection cap and hand tighten.