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John Deere Tractors Discussion Board

Re: 301 reverser help


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Posted by buickanddeere on October 03, 2012 at 17:13:25 from (216.183.145.191):

In Reply to: Re: 301 reverser help posted by RGMartin on October 03, 2012 at 04:01:22:

http://jdpc.deere.com/jdpc/servlet/com.deere.u9049
0.partscatalog.view.servlets.HomePageServlet_Alt

for the parts manual.

AR96662 OIL PUMP 1 -
XXXXXX (MARKED R39244 OR R57959) (SUB FOR
AR39107)
AR96662 OIL PUMP 1
XXXXXX - (MARKED R39244 OR R57959)
(SUB FOR AR39107)

TRANSMISSION RELIEF VALVE
Cart KEY PART NO. PART NAME
QTY TRACTOR SERIAL NO. REMARKS
1 R27175 DRAIN PLUG 1
2 F3171R O-RING 1
3 T22853 SLEEVE 1
4 R31698 SPRING 1
5 R39294 PIN FASTENER 1
6 34H247 SPRING PIN 2
1/8" X 3/4"

The transmission relief/divert valves are inside
the transmission iirc at the filter inlet.
There is a tempting looking thingmajig that
looks like a relief valve but is the steering
priority valve. Could that be what was shimmed?
The odd thing here is high pressure hydraulics
when the transmission supply to the front pump
should be weak?
If the transmission doesn't have enough
pressure. A valve will divert oil away from the
front pump supply and maintain transmission
lubrication.
The trans filter is often "forgotton" as the
operator manual service intervals are either not
read or ignored. If the divert valve starts to
chatter, sometimes the pressure spikes will jar
transmission oil lines and fittings into failure.
Could be as simple as a speck of dirt in a
transmission pressure control valve.


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