GREAT PLAINS YP1630F-1630, Operator'S Manual, Page: 43 / 142

YP1630F-1630 and YP1630F-1670 Table of Contents Index Operating Instructions
Great Plains | 401-832M | 2018-07-31 Table of Contents Index 39
Treatment Drive Clutch
Treatment Meter Clutch Disengagement
The treatment meter may be disengaged from the drive
system, as required in several situations, for example:
•
hopper removal for clean-out or maintenance
•
treatment not being applied while seeding
•
seed meter calibration
Refer to Figure 37
To disengage a meter, pull the knob away (left) of the
row unit. Rotate the knob until the inner cross-pin is
seated in the shallow detents of the hub.
Meter Shaft Alignment
The treatment meter clutch and meter-input shaft must
be aligned. Misalignment causes meter malfunction and
excessive meter-housing and clutch wear. Periodically
check vertical and horizontal alignment of meter clutch
and meter-input shafts.
Refer to Figure 38
1. Latch hopper onto hopper support cross-tube.
2. Check that the roll pin in the end of the meter input
shaft is centered. When centered, equal amounts of
the roll pin protrude from both sides of the shaft.
3. Rotate the meter input shaft so that the roll pin is
vertical.
4. Rotate the drive coupler on meter clutch so that
the slots are vertical.
5. Release the meter clutch to engage the meter input
shaft.
6. If shafts are aligned vertically, the drive coupler
engages with the meter input shaft freely and the roll
pin extends equally on each side of the drive coupler.
Disengage the clutch and repeat steps, checking for
horizontal alignment.
7. If the drive coupler does not freely engage the meter
input shaft vertically and horizontally, loosen the
5 
16
inch nuts on the flangette. Engage the meter
clutch. Align the meter clutch with the meter input
shaft. Tighten the
5 
16
inch nuts to Grade 5 torque
specification.
Disabling Unused Drives
To reduce wear on unused components, the various
drive systems can be disabled at various scales.
Circumstances which call for this include:
•
Calibration (testing one system while avoiding
material loss at others)
•
Seeding without application of fertilizer and/or
treatments

On a dual-meter planter, the treatment meter drive
clutch is the rear clutch.
Figure 37
Treatment Meter Clutch
34472
2
3
1
1
2
3
Figure 38
Treatment Drive Coupler
17891
4
5
6
6
4
5
6