430/441 hydraulic question

Location
NE Ohio
I have an early model with dry clutch. The question is, what is the purpose of the shift spool near the filter? It has the little tab on it to move it.

Thanks in advance!
Jim
 
I think you are referring to the hyd pump drive shifter, this is to be shifted only when engine is off and allows the hyd pump to be shut off when not in use cnt
 
here are the instuctions for the hyd pump disenguagement function cnt
a89109.jpg
 
First off, it is a true testament of your fine character to help others who can do you no good while you are caring for your loved ones in a time of need! My prayers are with you and your wife.

Secondly, Thank you for your time and depth of knowlege! I would not own tractors if it were not for this forum and the support offered here!
 

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