GREAT PLAINS YP4425A, Operating Manual, Page: 161 / 170

YP4425A Table of Contents Index Appendix C - Option Installation 157
2018-07-30 Table of Contents Index 401-805M
402-520A Low Speed Kit Installation
See “ Low Speed Kit ” on page 125 for the purpose of
this kit.
1. Shut off any hydraulic source that powers the
hydraulic seed meter drives (dedicated remotes or
PTO).
Refer to Figure 153
2. At the hydraulic drive motor, loosen the idler nut .
Slide the idler out of engagement with the existing
chain
. Remove and save the existing chain:
136-247D CHAIN RL #60 41 PITCHE S
3. Loosen the set screws securing the existing 16T
sprocket
. Remove and save the sprocket:
8 0 8 -3 88 C S PKT 60B16 X 1 BORE W/KWAY, SS
Leave the woodruff key in place.
4. Select one new 10T sprocket:
8 0 8 -479C S PKT 60B10 X 1 BORE W/KWAY 2 SS
Install it on the motor shaft. Secure it with the
woodruff key and two set screws provided.
5. Select one new:
136-2 8 5D CHAIN RL #60 3 8 PITCHE S
Consult page 109 and the directional
arrows
shown on the page for proper chain
clip orientation. Install the new chain on the new
sprocket and existing driven sprocket.
Engage the idler for
1
/
4
inch (2.1 cm/m) slack.
Secure the idler nut .
16
10
2
1
27
28
30
31
Figure 153
Low Speed Kit Sprocket
36355
1
27
27
28
28
1
31
30
1