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Magnum 7140 transmission

A

Anonymous-0

Well-known Member
This is my first fall using my new to me Magnum. It has 5500
hrs. and has run great so far. now that it is getting cooler I
notice when I first want to move the tractor, when it is cold,
that it seems like the tractor is very difficult to move at first. if I
take it on the road 15th gear is about all it can handle at full
throttle for 3 or 4 minutes. once it warms up everything works
great again. what causes or suggestions could you give me?
Thanks
 
I always let our 7120 warm up for 10-15 minutes or so before I even think about moving it depending on the temperature.Its easier on transmision and engine.
 
I have never been a big fan of letting an engine run idle for a long period of time to warm up. Much rather run a few minutes and then under moderate speed and light load gradually increase speed and load to warm engine. BUT, that being said, with all the hydraulics on that tractor you need to let it run for a quite a while to get hydraulic fluids warmed up some. On these pfc hydraulic and closed center valve hydraulics, no oil is going through much of anyplace when not being used so some hook a hose from one aux valve coupler set and circulate the oil though during warm up. The lube system oil will be running quite a lot of oil through system but all the transmission clutch's are dead headed so no circulation through them. Forty gals of cold oil takes quite a while to warm up.
 
I should have added that I always bump it up to about 900 rpm.I drove truck for quite awhile and if someone jumped in my truck when the temperature is close to freezing without letting it warm up they would get their a$$ kicked and be looking for a new job.
 
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