204 and 604 Table Back Section Positioning Troubleshooting

Back Section Release Mechanism

When either back release handle is squeezed, linkage rotates the cam. The rotating cam pushes the plunger down, compressing the cylinder pin. When the cylinder pin is compressed, the pressure inside the cylinder is released, allowing the back section to be repositioned.

When the back handle is released, the cam and plunger return to their normal position. This removes pressure from the cylinder pin allowing the cylinder to pressurize and lock the back section in place. Back Release Handle

Back section drifts up or down.

Newer units may have two jam nuts.

Gas cylinder screwed in too far?

1.Loosen jam nut(s).

2.Unscrew cylinder slightly.

3.Tighten jam nut(s), then test

4.Replace gas cylinder, Refer to:Back Release Mechanism Test and Repair.

Back section is locked in place or Back section is difficult to position.

Newer units may have two jam nuts.

Gas cylinder is not screwed in far enough?

1.Loosen jam nut(s).

2.Screw cylinder in slightly.

3.Tighten jam nut(s), then test.

4.Replace gas cylinder, Refer to: Back Release Mechanism Test and Repair.