Minneapolis Moline 445 Hyd trouble

   / Minneapolis Moline 445 Hyd trouble #1  

racekar18

New member
Joined
Jul 4, 2011
Messages
1
Tractor
MM 445
My 445 is having serious hyd trouble. The pump gets to hot to touch after only 30 seconds. I had the pump rebuilt and the pressure relief valve was completely melted. After installing the pump it still gets hot. Also the pto turns all the time. Mabye a related problem? Any help please?
 
   / Minneapolis Moline 445 Hyd trouble #2  
My only MM experience is with a M5 (and not much at that). What did you do about the "melted relief valve"? Sounds to me like the pump is deadheaded for some reason and the oil was going past the relief valve causing the heating problem. I would make sure all valves are in neutral. The M5 has very little hydraulic oil capacity and expect yours is the same, so it wouldn't take much to build heat fast. I don't think the M5 even had a relief valve, or least not an obvious one. I don't recall anything on the PTO operation.

If no one here can help, try on YesterdaysTractors.com.

Kim
 

Tractor & Equipment Auctions

2010 Ford Edge SE SUV (A51694)
2010 Ford Edge SE...
3/16Th Plate Steel (A52377)
3/16Th Plate Steel...
2016 Ford F-450 Crew Cab Knapheide Service Truck (A52377)
2016 Ford F-450...
2025 K5436 UNUSED (5) Wire Mesh Panels (A53117)
2025 K5436 UNUSED...
BOMAG BW145D-40 SMOOTH DRUM ROLLER (A51246)
BOMAG BW145D-40...
2006 Victory Lane 36SRV 39FT Tri-Axle 5th Wheel Toy Hauler Travel Trailer (A51694)
2006 Victory Lane...
 
Top