Fujitsu PRIMERGY RX2540 M6 Upgrade And Maintenance Manual page 380

Liquid cooling (LC)
▶ Push the four latches outward (see arrows).
▶ Fasten the four captive screws in the sequence printed on the heat sink (1 to
4), by proceeding as follows:
Torque: 0.9 Nm (not used in Japan)
▶ First, fasten the captive screws 1 and 2 completely.
▶ Fasten the captive screws 3 and 4 completely.
▶ Proceed for the second LC heat sink in the same way.
Note when tightening the screws of the CPU heat sink:
▶ As shown in the figure below, tighten the screws while checking the screw
tip until it is visible through the screw hole.
▶ When you reach the above position, hold the screw driver with two fingers
and tighten the screw firmly.
380 Upgrade and Maintenance Manual RX2540 M6