Collect the necessary items to complete the X idler mount. These are:
Insert the M3 Hex Nut into the slot for the hex nut on the back of the Belt Tension Arm ([FDM-0037_belt-tension-arm]).
Insert the M3x16mm Machine Screw through the front hole in the Belt Tension Arm and then tighten the M3x16mm Machine Screw.
Thread an M3 Cap Nut on the end of the M3x16mm Machine Screw.
Insert the GT2 Idler Pulley into the center slot of the Belt Tension Arm.
Insert the M5x25mm Machine Screw through the top of the Belt Tension Arm and GT2 Idler Pulley.
Add an M5 Hex Nut on the bottom of the Belt Tension Arm and tighten.
Insert the M5 Hex Nut into the slot for the hex nut on the bottom of the Idler Mount (FDM-0013-00_x-idler-mount).
Insert completed Belt Tension Arm assembly into slot.