Agilent Technologies G3430-68640 User manual

Agilent Technologies
Agilent G3430-68640 Removable Oven Door
Accessory
Installation Guide
Parts Supplied
Parts Identification
Table 1 Parts supplied
Part Part number Quantity
Screw: Mach M4 x 0.7, 20 mm, LG T-20 Pan HD SST 0515-0686 1
Rod base plate G3430-00646 1
Rod hook plate G3430-00647 1
Flange support spacer G3430-20645 1
Rod G3430-20643 1
Removable oven door (not shown) G3430-60640 1
Rod
Rod base plate
Rod hook plate
M4 screw
Flange support spacer

2 G3430-68640 Removable Oven Door Accessory Installation Guide
Tools Required
The following tools are required:
•Small- to medium- sized flat head screw driver
•Medium- to large- sized flat head screw driver
•T- 20 Torx driver
•Needle nose pliers
Installation Procedure
This procedure explains how to install the G3430- 68640 Removable Oven
Door Accessory on an Agilent 7890 Series Gas Chromatograph (GC).
Prepare the GC
1Cool down the detectors, inlets, and oven.
2Turn off the GC and disconnect the power cord.
3Turn off the source gases.
4If necessary, remove any automatic liquid sampler (ALS) devices and
disconnect any transfer lines from your GC inlets. Refer to your
relevant instrument documentation for details.
5Remove any mounting posts from the inlet top cover.
WARNING
The GC zones may be hot. Cool the GC before beginning. Wear heat-resistant
gloves when handling hot parts.
Turn off detector and hazardous gases.
CAUTION
To prevent damage to the GC columns, remove them from the GC.

G3430-68640 Removable Oven Door Accessory Installation Guide 3
Remove the inlet top cover
1Remove all T- 20 Torx screws securing the inlet top cover to the GC
(Figure 1).
Figure 1 Remove all T-20 Torx screws
2Remove the inlet cover from the GC and set it aside. Be careful to not
damage any gas lines during removal.

4 G3430-68640 Removable Oven Door Accessory Installation Guide
Remove the oven door
There are two different methods for removing the oven door from the GC.
Try the steps in “Pulling the door hinge rod up using needle nose pliers”
on page 4 first. If it is not possible to do, skip to “Pushing the door hinge
rod up using a flat head screwdriver” on page 6.
Pulling the door hinge rod up using needle nose pliers
1Once the oven has cooled to ambient temperature, open the oven door
enough so that the door hinge rod is easily accessible.
2Using needle nose pliers, grip the rod as shown in Figure 2, then pull
up on the rod and hold.
Figure 2 Pulling the rod up using needle nose pliers
WARNING
To prevent personal injury, take care to adequately support the door using both
hands or a second person. Failure to properly support the door could cause it to
fall.

G3430-68640 Removable Oven Door Accessory Installation Guide 5
3While continuing to hold the rod up, use a T- 20 Torx driver at the top
of the rod (Figure 3) to rotate and engage the rod’s lower threads in
the lower door flange. Once the threads are engaged, you can stop
holding the rod with pliers.
Figure 3 T-20 Torx fitting on door hinge rod
4Continue to unscrew the rod using the T- 20 Torx driver, and remove it
from the GC. Be sure to hold the door when removing the rod to avoid
dropping the door.
5Remove the oven door from the GC.
Use T-20 Torx driver here
Door hinge rod

6 G3430-68640 Removable Oven Door Accessory Installation Guide
Pushing the door hinge rod up using a flat head screwdriver
1Carefully slide the GC so that the front- right corner extends over an
edge of the work bench and allows for access to the underside of the
GC (see Figure 4). Be wary of gas lines, the power cable, and any other
attachments and nearby instruments when moving the GC.
Figure 4 GC front-right corner extended over edge of work bench
2Once the oven has cooled to ambient temperature, open the oven door.
3From the underside of the GC (Figure 5), use a flat head screwdriver to
push the rod up while rotating to engage the rod’s lower threads in the
lower door flange. Once engaged, you can stop pushing up on the rod
from below.
Figure 5 Rod on underside of GC
4From the top of the rod, use a T- 20 Torx driver to completely unscrew
the rod and remove it from the GC. Be sure to hold the door when
removing the rod to avoid dropping the door.
5Remove the oven door from the GC.

G3430-68640 Removable Oven Door Accessory Installation Guide 7
Install the removable oven door
1Install the base plate for the removable oven door.
aUse the supplied M4 screw to attach the hook plate onto the base
plate as shown in Figure 6. Be sure to only engage one or two
threads of the screw.
Figure 6 Preparing the base plate and hook plate for installation

8 G3430-68640 Removable Oven Door Accessory Installation Guide
bSqueeze the hook plate (with its flange pointed up and to the left)
and base plate (with its flange pointed down and to the right)
together, then slide it beneath the door bracket and inside the
instrument base, as shown in Figure 7.
Figure 7 Installing the base plate with hook plate
cOnce in place, use a T- 20 Torx driver to tighten the M4 screw. This
will rotate and latch the hook plate to the instrument base as shown
in Figure 8.
Figure 8 Underside of GC with base plate installed
Base plate
Screw
Base plate installed
Hook plate latched onto
instrument base
Instrument base

G3430-68640 Removable Oven Door Accessory Installation Guide 9
2Install the flange support spacer to the base plate on the underside of
the lower oven door bracket. Lower the flange support spacer (with
threaded opening facing down) into the location shown in Figure 9,
then slide the flange support spacer under the flange to the front- left
corner, as shown in Figure 10. If needed, gently pry the lower door
bracket up when positioning the flange support spacer. Note the side of
the flange support spacer overhangs the plastic casing and fits evenly
against the inside corner of the plastic casing (Figure 10).
Figure 9 Installing the flange support spacer
Figure 10 Flange support spacer orientation

10 G3430-68640 Removable Oven Door Accessory Installation Guide
3Insert the lower oven door pin into the oven door bracket and flange
support opening as shown in Figure 11. Thread the door pin all the
way through the oven bracket’s lower flange, then apply some
downward force to insert it through the flange support and base plate.
Thread the door pin into in the flange support until tight.
Figure 11 Installing the oven door pin
Note that the pin may appear slightly canted. This does not affect the door
functionality.