L 3650 gets hot

jgum

Member

Equipment
L 3650 kubota
Apr 17, 2022
60
4
8
36
West virginia
Just working. After awhile of work the radiator will boil over and it usually takes about two 12 ounce water bottles to fill it up. Thermostat has recently been replaced and radiator has been blown out. Maybe I’m over working it or maybe i have a problem with my machine.
 

North Idaho Wolfman

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Staff member
Lifetime Member

Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
30,239
6,401
113
Sandpoint, ID
Might be water pump is failing or worn out.
Worst case is cracked head or Blown head gasket.
Bad / loose fan belt or fan drive can do it too.

You shouldn't be able to overwork it!

Any case get it fixed, because overheating will cause it to crack the head!
 
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Roadworthy

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L2501 HST
Aug 17, 2019
1,649
526
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Benton City, WA
I'd start with the simplest stuff. Be sure external air path through the radiator is clear. Blow from the rear of the tractor through the radiator with air or even water from your garden hose. Junk in the fins does a remarkable job of restricting cooling air flow. Is the fan spinning? Did you check the thermostat for proper operation? You can put it into a pan of water, heat it, and see if it actuates.
 
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jgum

Member

Equipment
L 3650 kubota
Apr 17, 2022
60
4
8
36
West virginia
Might be water pump is failing or worn out.
Worst case is cracked head or Blown head gasket.
Bad / loose fan belt or fan drive can do it too.

You shouldn't be able to overwork it!

Any case get it fixed, because overheating will cause it to crack the head!
What is the best way to trouble shoot this wolf man?
 

North Idaho Wolfman

Moderator
Staff member
Lifetime Member

Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
30,239
6,401
113
Sandpoint, ID
The water pump is 16412-73030, and gasket 17331-73430

I would start by taking off the radiator cap, fill the radiator to the top.
Then run it, first look for circulation, and look for bubbles.
If you have no circulation let it run for a bit checking temp of the water, run till warm.
If you still have no circulation you have a bad pump.
Note: This is not 100%, some radiator styles make it really tough to see circulation.
If you have bubbles, smoke puffs, steam puffs, or you see an oil sheen on the water in the radiator, shut it down and pull the head!

If circulation is good, and no bubbles, pull the fan belt and check for smooth rotation of the fan and water pump.
 
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fried1765

Well-known member

Equipment
Kubota L48 TLB, Ford 1920 FEL, Ford 8N, SCAG Liberty Z, Gravely Pro.
Nov 14, 2019
7,843
5,066
113
Eastham, Ma
Just working. After awhile of work the radiator will boil over and it usually takes about two 12 ounce water bottles to fill it up. Thermostat has recently been replaced and radiator has been blown out. Maybe I’m over working it or maybe i have a problem with my machine.
First: check for situations described above.

A tractor 30 plus years old though, (depending upon hours ) could certainly reasonably be expected to need a new water pump.
Cost on E-Bay is $86.87 +tax
Others may be less.
 
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jgum

Member

Equipment
L 3650 kubota
Apr 17, 2022
60
4
8
36
West virginia
The water pump is 16412-73030, and gasket 17331-73430

I would start by taking off the radiator cap, fill the radiator to the top.
Then run it, first look for circulation, and look for bubbles.
If you have no circulation let it run for a bit checking temp of the water, run till warm.
If you still have no circulation you have a bad pump.
Note: This is not 100%, some radiator styles make it really tough to see circulation.
If you have bubbles, smoke puffs, steam puffs, or you see an oil sheen on the water in the radiator, shut it down and pull the head!

If circulation is good, and no bubbles, pull the fan belt and check for smooth rotation of the fan and water pump.
Thank you for your advice. I think it is the water pump honestly. And it’s due. I just want to check these symptoms first.
First: check for situations described above.

A tractor 30 plus years old though, (depending upon hours ) could certainly reasonably be expected to need a new water pump.
Cost on E-Bay is $86.87 +tax
Others may be less.
you’re definitely right i just wasn’t sure how to diagnose the the culprit cause it seemed to be circulating