[FONT=Arial,Helvetica]
TPC manitous also need a large air space in the damper. This is because they work on displacement (volume change) and the oil level rises in the stanchion as the fork compresses.
Too much oil causes hydraulic lock, too little causes cavitation and both can damage your fork.
The oil is best 5cm above the top compression piston in all forks. To check the oil level unscrew the damper side topcap and draw up the attached compression assembly. When it is clear of the oil let it fall back into the stanchion. The assembly will stop falling when it hits the oil surface. At this point the distance from the cap o-ring to the top of the forks crown gives an approximate height for the oil above the installed piston.[/FONT]