FMC Corporation - Talstar FMC L06 - Manual (Page 35)

Doc No: OMM50000903
Rev: B Page 35 of 65
Subject to contractual terms and conditions to the contrary, this document and all the information contained herein are the confidential and exclusive
property of FMC Technologies, and may not be reproduced, disclosed, or made public in any manner prior to express written authorization by FMC.
This style of tool includes a disc that passes through the seat to allow force to be placed
underneath it. The disc has a threaded hole that is at the center of the disc (concentric
disc). A tension rod is threaded into the hole. The second disc has an eccentric hole
with clearance for the tension rod and sits on top of the threaded disc. This keeps the
threaded disc engaged with the edge of the seat.
Figure 8: Eccentric Disc in Use
The tension rod is located through the top of the fluid cylinder and through a strong back
that rests on the top of the fluid cylinder. A nut is threaded over the tension rod and
tightens down on the strong back. The nut is tightened to place tension in the rod,
putting upward pressure on the seat of the fluid cylinder.
A bumper is placed over the tension rod with a nut stop above the bumper. When the
nut on the strong back is tightened (tensioning the rod), the bumper is moved rapidly
upward striking the retaining nut. This imparts a shock load into the seat. This
sequence is repeated until the seat pops loose from the fluid cylinder.
WARNING: The seat may pop suddenly when force is applied. Stand with feet apart
when applying striking action. Keep head back so tool does not strike your jaw when
the seat pops. Ask for a work partner to steady you to avoid slipping. The bumper
sliding upward against the stop nut creates a pinch point that can cause hand injury if
gripped improperly. Always hold the bumper by the handles only and use leather work
gloves to lessen the shock to your hands.
Tension Rod
Valve Seat, (shown removed from the
Fluid Cylinder)
Threaded Disc
Eccentric Disc