Removing the radiator from a B1750 HST 4x4

Reddawg

New member

Equipment
B1750, gannon box, finish mower, gannon box, tiller, rake
Sep 8, 2023
7
0
1
Oklahoma
Howdy all, this is my first post so please bear with me. I bought a well-used B1750 a few months ago for basically tilling my garden and moving trailers and boats around my little property. I checked the radiator fluid the other day and saw it was low so I filled it just to see it running out of the bottom of the water pump. I hope. I ordered a new pump and some hoses that are here now. I just went out and started to remove the hoses and two bolts at the bottom of the radiator. The bolts do not want to move much. I see what looks like springs above the rubber mounts. I did not want to tear something up so I stopped and started looking for information ie advice and found this forum. Am I supposed to remove this without taking those two bottom bolts loose? If so how? Thanks, PS it also Dripps diesel a little and smokes pretty good. lol
 

Russell King

Well-known member
Lifetime Member

Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Jun 17, 2012
5,371
1,418
113
Austin, Texas
You can use this site to look at illustrated parts lists.


but you need to remove two bolts into the bottom of the radiator and then the radiator will come out. There are some rubber supports and washers involved also but those may have been replaced with springs.

be gentle with the bolts since they can damage the radiator. I think you may be able to get some PB Blaster or similar on to the threads from above
 

Reddawg

New member

Equipment
B1750, gannon box, finish mower, gannon box, tiller, rake
Sep 8, 2023
7
0
1
Oklahoma
You can use this site to look at illustrated parts lists.


but you need to remove two bolts into the bottom of the radiator and then the radiator will come out. There are some rubber supports and washers involved also but those may have been replaced with springs.

be gentle with the bolts since they can damage the radiator. I think you may be able to get some PB Blaster or similar on to the threads from above
Thanks for your reply. I will soak them with some blaster and try again. They do not want to loosen up and one kinda seemed like it was backing off right but then made a popping noise and got tight again. That's when I stopped. I guess if all else fails I will put some heat on them and see if that gets the job done. I used to have a habit of twisting bolts in half and I'm a little leary of doing the same here. Well, thanks for the information and I will try it again when the sun comes up. thanks again---
 

Russell King

Well-known member
Lifetime Member

Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Jun 17, 2012
5,371
1,418
113
Austin, Texas
Thanks for your reply. I will soak them with some blaster and try again. They do not want to loosen up and one kinda seemed like it was backing off right but then made a popping noise and got tight again. That's when I stopped. I guess if all else fails I will put some heat on them and see if that gets the job done. I used to have a habit of twisting bolts in half and I'm a little leary of doing the same here. Well, thanks for the information and I will try it again when the sun comes up. thanks again---
There may be some locknut applied to the top end? i know on my L185 there were some cotter pins involved in the radiator attachment to keep it from loosening up due to the fact that there are rubber bumpers involved (so the bolts really don’t have much load on them)

You may want to remove the hood so you can see what is going on before trying too hard.
 

Reddawg

New member

Equipment
B1750, gannon box, finish mower, gannon box, tiller, rake
Sep 8, 2023
7
0
1
Oklahoma
There may be some locknut applied to the top end? i know on my L185 there were some cotter pins involved in the radiator attachment to keep it from loosening up due to the fact that there are rubber bumpers involved (so the bolts really don’t have much load on them)

You may want to remove the hood so you can see what is going on before trying too hard.
Ok!!! I went a different route. It was a real bear to get the first bolt out but I did get it loose. About the time I got it loose, I looked over and noticed a small bolt sticking through the mount from the outside of the tractor. When I checked it out a little better I saw that I could unscrew two bolts from outside and remove the radiator, mounts, and all in a much more accessible way. It came right out with no problem after I removed the mount bolts. I got sidetracked by the little woman before I could remove the water pump but before I remove it I'm going to block off the lower water line and put some water in it to check and see where the water is coming out. I keep getting this sinking feeling that I may have a cracked block or blown head gasket instead of a bad pump. The tractor still starts though and there is no water in the oil. Will see soon enough. Thanks for your help guys. This tractor is well used so I'm thinking that I will be asking a lot of questions in the future.