MMI Replacement of O-ring and Liner

First, set the instrument to a state in which it can be serviced (Maintenance Mode).

Required devices¶

No.	Parts name	Category	Required number	Note
①	Tweezers	Other	1
②	Liner	Liner for MMI	1	Various optional parts are available.
③	O-ring for MMI	O-ring (for Liner)	1	Optional product with high heat resistance is available.
④	Removal Tool	Parts for Injection Unit	1	Optional part
⑤	Spacer for MMI	Parts for Injection Unit	1	Required when using liquid nitrogen to cool MMI and setting it to -50°C or below.

Procedures¶

Step 1¶

GC-2060¶

Step 2¶

Step 3¶

Note

To prevent damage to the liner, lift the injection port straight up slowly with your left hand.

Step 4¶

Note

Be careful not to damage the O-ring seating surface of the sample injection port.

Hint

Using the removal tool (④) makes it easy to pull out.

Step 5¶

Hint

Temporarily fix the O-ring about 4 mm from the top of the liner, set it into the sample injection port, and press it down with tweezers until it reaches the bottom.
The standard accessory liner comes pre-packed with silica wool at the specified position. When using a liner without pre-packed silica wool, pack silica wool according to Guide for Packing Position of Silica Wool .

Step 6¶

Step 7¶

Install the liner fixing nut (★2) so that it meshes securely with the groove of the injection port, and turn it clockwise to fix it.

Hint

Fix the protrusion of the liner fixing nut (★4) into the hole of the MMI cover (★5) before turning the nut to make tightening easier.

Note

Do not overtighten the nut as this may cause the O-ring to be pushed inward, making it impossible to remove the liner.

Note

When setting the MMI cooling to below -50°C using liquid nitrogen, use the spacer (⑤) and tighten the nut further.

Step 8¶

Step 9¶

Exit maintenance mode using the following procedure according to the relevant instrument, and reset the consumable usage counter.