Great Plains YP2425F-2470 Material Rate - Manual (Page 46)

44 YP2425 & YP2425F Table of Contents Appendix Great Plains Manufacturing, Inc.
401-406B Table of Contents Appendix 2013-09-23
Hypro Pump Rate
Two ground drive diaphragm pumps supply each wing of
a Type 2 boom on older planters. The pumps
, one on
each side of the planter, are driven by ground contact
wheels
. Fertilizer rate is independent of seed rate.
Fertilizer rate is set by sprockets on the ground drive
assembly.
Contact wheel and chain system operate whenever the
planter is lowered and in motion. If planting without
fertilizing, the pump must not be allowed to run dry.
Disconnect chain or remove sprocket.
Refer to Figure 20
1. Check plumbing setup. See “Setting Relief Valve”
and “Strainer” in the Operator Manual.
2. Determine Drive Type and sprocket pair required
from tables following. If this pair is already installed
on driving/driven shafts, no further adjustments are
required. Otherwise, to change sprockets, continue
with step 3.
3. Remove knob and guard . Loosen idler , and
remove chain from Upper (driven) pump shaft
and Lower (driving) shaft .
4. Select the new driven sprocket from the storage
shafts
, . Remove the pin at shaft , and
exchange sprockets. Store the previous sprocket on
a storage shaft.
5. Select the new driving sprocket from the storage
shafts
, . Remove the pin at shaft , and
exchange sprockets. Store the previous sprocket on
a storage shaft.
6. Remount the chain , making sure open end of clip
at removable link faces away from direction of
chain travel. Re-engage idler , tightening so that
the longest span of the chain has
1 ⁄
4
inch (6 mm) of
slack.
7. Re-install guard and secure with knob .
1
2
Figure 20
Ground Drive Fertilizer Pump
25319
1
4
3
L
U
7
2
5
6
8
9
DRIVING
DRIVEN
3 4 5
6 U
L
7 8 U
7 8 L
6
9
5
4 3