Great Plains Air-Pro Field Update Kit - Manual (Page 5)

Install Update Front Page Part Lists Great Plains Manufacturing, Inc. 5
2012-11-21 Front Page Part Lists 403-642M
Install Update
Install Elbow Sense Fitting
Refer to Figure 6 (which depicts a non-sensing row)
If the current meter has a plug
at the sense hole, skip
to “Assemble Air Release” on page 5.
Refer to Figure 8 (which depicts a bare meter housing for
clarity)
15. From the 403-645A Tool kit, select one new:
891-328C EL 45 7/16MORB X 1/4HB
Install it at the sense hole where the straight adaptor
was removed. Thread it in tightly, then turn it counter-
clockwise until the hose bar end is pointing forward
and slightly down.
16. Select one saved:
803-374C NUT HEX JAM 7/16-20 PLT
Use it to secure the elbow.
17. Reconnect the sense air line tube (not shown).
Assemble Air Release
You can pre-assemble the new air release cone, or
assemble it on the meter, whichever seems more reliable
and efficient. The following steps describe pre-assembly.
Refer to Figure 9
18. Select two new:
817-964C LG AIR MTR SCREEN CONE HALF
and one each new:
891-295C AIR METER SD TB SCRN CONIC
Insert the screen in one of the two cone
halves , so that the flanged ring of the cone sits in
the neck groove of the cone half.
Join the two cone halves .
Refer to Figure 10
19. Select one new:
817-826C CLAMP HOSE NYLON GF MATRIX 192
(this is the largest of the three sizes of new clamp
provided)
Secure the clamp around the large end of the
cone halves . Rotate the ratchet so that it is
over the seams, on either side, of the cone halves.
Tighten with pliers.
Figure 8
Install Sense Adaptor Elbow
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Equipment Damage Risk:
Take care to avoid damage to the exit lip of the screen
.
In particular, avoid bending the edge inward. Bends, tears and
fraying can result in bridging problems during use. Minimize
the number of attempts to assemble. Hold the assembly
carefully after assembly, as there is no positive connection
between the screen and cone halves - they are held in place by
clamps on the meter.
Figure 9
New Air Release Assembly
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