John Deere 4320 Trans Pump

DGK

Member
What kind of a job to change or rebuild TRANS, Pump? also I had PTO valve off all 3 o rings were broke. run tractor for 1/2 hour and only got warm but doesn't stop PTO, With clutdh in no steering or brakes. Thanks for help on orings. Doug
 
No rebuilding them, the housing and the gears wear,, it's under the rockshaft, and only place you can get it is from Deere.
AR51652 Housing - BODY TRANS OIL PUMP WITH PIN ADD 436.92 USD 436.92 USD
R543223 Gear - GEAR, TRANS OIL PUMP DRIVEN ADD 145.20 USD 145.20 USD
R543224 Gear - GEAR, TRANS OIL PUMP IDLER ADD 105.55 USD 105.55
about $690,,Wow...This pump is different from a 4020 pump also..
 
Engage pto then try pushing clutch again.
If you don't lose hydraulics then pto brake oring
needs replacing.
 
I have one out on the bench right now, not a bad job other than wrestling all the rusted hardware out of the old cab thats on it to get at/remove r/s.
Tim your numbers for the gears are different than what I have....shows a matched gear set AR40670. Hope I have the right thing.
 

Part Number:
R543223
R543224
Qty.
1
1
Description
Gear - GEAR, TRANS OIL PUMP DRIVEN
Gear - GEAR, TRANS OIL PUMP IDLER

Replaces Part: AR40670
Description: Gear - GEARS,TRANS OIL PUMP /PARTS/
 
Mine does not have cab. I ordered a service manual but haven't got it yet . Does the rock shaft casting have to come of or is there a plate or some other way to get to it?
 

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