Warm Up

[Stmar]

How do you determine the warm up time for your tractor? My B2650 starts out at the mid 900's rpm when cold, after about 5-10 minutes it is up to mid 1050's. This is my minimum warm up, I usually go at least 15 minutes especially if it is cold (below 30F).

 

[FreezinGator]

The operators manual for my BX says above 32F at least 5 minutes, 14F to 32F 5 to 10 minutes, -4F to 14F 10 to 15 minutes and below -4F more than 15 minutes. I try to go by that at least for the initial start up for the day and wing it from there. Alot of times I will give it a few minutes to get it kind of warm to move it out of the garage and not really work it until it is fully warm as the manual suggests. I can usually find something to do while it is warming up like gas up the chainsaw/snowblower, run the string trimmer, grease the FEL, etc.

 

[MapleLeafFarmer]

X2 with Freezingator PLUS you are warming up with RPM too low. S/B about have rated RPM.
Page 25 of your operators manual details warmup procedure.
If you don't have it you can download it for free here:

https://kubota.ca/getmedia/82f4431d-325f-40b3-805c-45f2c62b4f22/B2650%C2%B7B3350%C2%B7B3350SU-OM-EN-6C41063113?ext=.pdf

 

[Freeheeler]

I start it, by the time the garage door opens all the way (maybe 10 seconds) I bump the idle up to about 1100, then back out of the garage. By the time the garage door closes, I'm ready to bump it up to 1400 or so and start heading to to side of the garage to attach whatever I'm using that day. Once forks or bucket or whatever is attached I figure she's warmed up enough to go to work. I'm in TN so it never really gets cold. Letting it sit and idle for 15 minutes would be a complete waste of fuel an time for me. Mine has a distinctive difference in how it sounds at start up vs once warmed up a bit. Probably not the most accurate method, but once she sounds warmed up that's good enough for me to go to work. BTW, my resting idle is 1025 or so, I'm assuming that was set at the dealer. 950 sounds kinda low, I don't know what the book says to set the idle to but now I'm curious.

 

[nbryan]

Don't start and warm your tractor at idle. When I've parked my B2650 warm and not using again for a while (long enough for engine to cool) I set the throttle lever up a bit so it's idling warm around 1250 (+-) rpm when I shut it down. It's a habit now - bump the throttle lever up a bit b4 shutdown.
That way it's at "warm-up rpm" as soon as I start it cold next time. 5-10 seconds on the glow depending on temps and fire it up and go do something else for a few minutes while she warms at 1250ish rpm.
The manual says set idle to "50%" for cold starts, or something like that. My operating loaded rpm is 2500 rpm, so I set the tach to 1250.
Works great for me. There's way less engine smoke and coughing at startup with the rpm bumped a bit.

 

[BobInSD]

Don't start and warm your tractor at idle. When I've parked my B2650 warm and not using again for a while (long enough for engine to cool) I set the throttle lever up a bit so it's idling warm around 1250 (+-) rpm when I shut it down. It's a habit now - bump the throttle lever up a bit b4 shutdown.
That way it's at "warm-up rpm" as soon as I start it cold next time. 5-10 seconds on the glow depending on temps and fire it up and go do something else for a few minutes while she warms at 1250ish rpm.
The manual says set idle to "50%" for cold starts, or something like that. My operating loaded rpm is 2500 rpm, so I set the tach to 1250.
Works great for me. There's way less engine smoke and coughing at startup with the rpm bumped a bit.

I was taught to kill a turbo-charged engine at the lowest possible RPM. I was also told (here) that a lot of the recommnded warm up time was to to with the HST/hydraulic fluid, especially at very low temps. I'm not sure that either applies here but depending on your transmission and your climate YMMV.

 

[nbryan]

I was taught to kill a turbo-charged engine at the lowest possible RPM. I was also told (here) that a lot of the recommnded warm up time was to to with the HST/hydraulic fluid, especially at very low temps. I'm not sure that either applies here but depending on your transmission and your climate YMMV.

The B2650 is not a turbo.

 

[JimmyJazz]

I don't warm mine up at all. So far so good. Its a "yard" tractor and cuts grass mostly.

 

[RalphVa]

How do you determine the warm up time for your tractor? My B2650 starts out at the mid 900's rpm when cold, after about 5-10 minutes it is up to mid 1050's. This is my minimum warm up, I usually go at least 15 minutes especially if it is cold (below 30F).

I start 'em up and go gently right away. Won't take but a couple seconds for it to run smoothly. Have done this all my 62 years of driving stuff. Never an engine failure. Ran one to 25 years and 415k miles. Still started and ran like new.