Great Plains 3PYP Planters - Manual (Page 4)

4 Great Plains Manufacturing, Inc. Front Page Part Lists Steering Upgrade
401-640M Front Page Part Lists 08/11/2010
Hydraulic System Changes
Remove Old Steering Valve Manifold
Oil Spill Hazard:
Take precautions to collect or mitigate spilled hydraulic fluid.
Avoid slipping on spilled oil. Some fluid will be lost as hoses
are disconnected and reconnected.
Refer to Figure 4
The steering valve manifold will be replaced. The new
manifold also requires a new bracket
411-616D.
12. Unplug the wiring harness from the valve harness by
unplugging the two 6 conductor weatherpack con-
nectors located near the valve manifold.
13. Mark each hose with the port designation:
All the hydraulic hoses attached to the old steering
valve manifold need to be marked as to their ports on
the manifold. Each port is stamped with a designa-
tion: P, T, M1, M2, DR, ST1, and ST2.
14. Remove each hose from the existing valve manifold.
15. Plug all the hoses.
16. After all the hoses are removed:
Unbolt and remove the old valve and bracket from
the planter. (The bracket is secured in place with the
two bottom bolts
in a row of four as pictured.)
Remove the two bottom bolts, nuts and washers:
802-383C HHCS 3/4-10X3 GR5
803-027C NUT HEX 3/4-10 PLT
804-023C WASHER LOCK SPRING 3/4 PLT
The bolts, nuts and washers are not reused.
17. Select and install two new bolts, nuts and washers:
802-086C HHCS 3/4-10X2 3/4 GR5
(These bolts are 1/4 in. shorter than the ones you
just removed to avoid protruding out too far.)
803-027C NUT HEX 3/4-10 PLT
804-023C WASHER LOCK SPRING 3/4 PLT
Figure 4
Old Steering Manifold Bracket
29766
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54
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26
37
34
23
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26
34
37