SVL95-2S Running Hot with Drum Mulcher

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
When running the mulcher, the machine motor temperature continually increases (20-30 minutes) until "Hot" warning sounds off. If anyone would like to talk to me about this problem, please feel free to call me at 931-292-0145 (Three Oaks Property Management)

Hi folks, while running a mulcher: my SVL95-2S Skid Steer equip with a Loftness Battle-Ax 71 inch mulcher with Loftness external cooler; begins to run hot (temp light signal and buzzer but not overheating, just running hot) after an hour of run time.
Has anyone experienced this and found resolution.
Yes, I checked the obvious, ie,:
1. Radiator I assured it was clean and I could see very clearly through it when shining a light through it.
2. Motor venting clean and clear.
3. I checked the antifreeze. Yes, antifreeze, good to 20 degrees, so it’s not straight anitfreeze.
4. Fan is spinning and pulling a lot of air through radiator.
5. Checked oil. ( changed with Kubota oils 8 hrs ago.
6. Check hydraulic fluid changed (12 gal, because I’m running a loftness cooler) and filter 10 hours ago.
7. Air filter new
8. DEF full, only use high grade no gas station DEF.
9. it with A/C on or off.
10. Does it with heater on or off.
11.Does it with windows open or closed
12. 3/4 or full throttle; it does it.
13. 75 degrees out, ever does it when it’s 65 degrees.
14. Using mulcher with external dual fan hydraulic cooler. (Both fans running) hydraulic lines are luke warm.
15. A/C condenser clean and full light can shine through.

5/21/21: As suggested by the first Kubota dealer; I transported my Skid Steer to a different Kubota dealer to see if they would have any better luck resolving this problem. I’ve been getting more and more folks contacting me with this same problem. The problem exists with and or without a cooler. All the Techs are still leaning towards the hydraulic pump/system being the culprit.

Update 5/18/22: The SS went back to Kubota Because it's still overheating. As requested, this time I delivered it with the mulching head on it. The tech spent most of the day testing the machine. He began by rechecked the new injectors to assure that all four were running correctly. They were.
Kubota Corp thought that the DEF Re-gen system might be clogged. They forced a re-gen and confirmed that the system was running at the correct temp and was not clogged. He operated the machine with his computer hooked to the system and sitting in his lap. Any time the mulching head was running the engine coolant temp rose significantly. Shut the head off and the temp began to lower. With this, he checked the engine and exhaust temps. He noted that the all engine and exhaust temps never increased enough to affect the coolant temp. This has lead him to believe that there could be a restriction somewhere in the hydraulic system. I'll have another update as soon as I know something.


Update 5/12/22: Took the machine to the Kubota dealer. On 5/2/22. motor still not throwing any codes. Motor is using 1/2 quart of oil every 300 hours. Kubota mechanic says that it normal usage. Mechanic checked port after the turbo to check for "oil burn". Turbo ports are clean with no residue.
After long deliberation, Kobota decided to send the injectors out to be tested. Three injectors were pushing too much diesel and failed the POP test.. Kubota warrantied all 4 injectors (zero cost for the repair).
***Mulched with the machine today: After 1/2 hour mulching, the machine is still overheating. Called
Kubota dealer, they said; tomorrow (5/13/22) they are going to set a conference call with Kubota to discuss the problem.

5/12/22: To eliminate the hydraulic system as the problem. I jumped the fans in the Loftness hydraulic cooler that is mounted on the top of the machine. When the fans are on (all the time), the hydraulic system is running at 125 degrees, and the motor still gets hot.
5/22/22: Kubota suggested setting the high flow settings from right side 14 left side 9 to 12-8 respectively. Machine still overheated.

Update: 4/25/22: tried changing the thermostat and both belts. Machine continues to run hot while running the mulcher. The longer I use the machine the hotter it gets. Temps are :
Top hose- 96 to 140 degrees
Bottom hose- 85-89 degrees



Thanks for your help
Mike
 
Last edited:

mattwithcats

Active member
Jun 17, 2017
704
46
28
Virginia
Check temperature of upper and lower radiator hose, top and bottom of radiator.

Careful, they are hot enough to burn you, and watch the fan!

The bottom one should be hot, the top warm.

If not, I suspect water pump first, then radiator second…
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
Check temperature of upper and lower radiator hose, top and bottom of radiator.

Careful, they are hot enough to burn you, and watch the fan!

The bottom one should be hot, the top warm.

If not, I suspect water pump first, then radiator second…
Great suggestion I didn’t think to do that, thanks.
And you are very correct, once I had a car where the impeller on the water pump began to slip, causing it to run a little hot.
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
OK, I know, silly question but...
as the fan's pulling lots of air in..where ,does it go afterwards ?
Could dirt/mud/?? plug up the exit holes in the 'armour' ??
That’s is a good question. I cleaned inside the belly and cleaned out the inspection covers at the rear of the tracks about four weeks ago, but the holes could be blocked already. It’s supposed to rain here Monday so, I’ll open them up and check them
Thanks
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
Is this the light that is coming on?
No sir, it’s the light picturing the motor cylinder with the thermometer next to it. (Attached). when running the machine for a long period of time the warning beeps three times, then the temperature light flashes two or three times, then it shut off for five or 10 minutes and then repeats
 

Attachments

rentthis

Member
Lifetime Member
May 30, 2012
979
13
18
summerville,sc
If your fan belt is glazed, it might heat up in a couple of hours and slip enough to heat the engine. This is way to simple to be the problem but simple is good.
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
G
If your fan belt is glazed, it might heat up in a couple of hours and slip enough to heat the engine. This is way to simple to be the problem but simple is good.
That’s a good idea to check. It squeals for about 5-7 seconds when I start it up. I’ll change it. and post the result
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
That’s is a good question. I cleaned inside the belly and cleaned out the inspection covers at the rear of the tracks about four weeks ago, but the holes could be blocked already. It’s supposed to rain here Monday so, I’ll open them up and check them
Thanks
I inspected the air exhaust cavities and they were somewhat full. I cleaned them out really good, but it is still getting hot a few hours of running. I discovered that if you use a “mulcher”, the air exhaust cavities can become somewhat full after 10-12 hours of operations. Although cleaning them didn’t solve my problem, I will be cleaning them after every mulching job.
Thanks for the good idea.
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
Check temperature of upper and lower radiator hose, top and bottom of radiator.

Careful, they are hot enough to burn you, and watch the fan!

The bottom one should be hot, the top warm.

If not, I suspect water pump first, then radiator second…
Temps are :
Top- 96 to 140 degrees
Bottom- 85-89 degrees
When over heating: the top hose is 225 degrees, bottom hose 189 degrees.
Appears that the high temp is coming from motors internal workings.
 
Last edited:

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
G

That’s a good idea to check. It squeals for about 5-7 seconds when I start it up. I’ll change it. and post the result
I changed the belt and the thermostat. set belt to manufacture specs. Tried turn fan with hand and was tight but not tight enough to have premature wear on water pump bearing.
Problem is still present.
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
That’s is a good question. I cleaned inside the belly and cleaned out the inspection covers at the rear of the tracks about four weeks ago, but the holes could be blocked already. It’s supposed to rain here Monday so, I’ll open them up and check them
Thanks
5/12/22: I'm keeping the air ports clean and free fro debris. Problem still present.
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
To the folks who are following. I updated the original post on 5/12/22. if you wish to read, please scroll back to the top. to say the least; This problem is becoming very interesting.
 

lugbolt

Well-known member

Equipment
ZG127S-54
Oct 15, 2015
3,774
871
113
Mid, South, USA
any leaks? Coolant ever low? Do you have to add any at any time?

Next thing to look at. Engine cold in the morning take the radiator cap off. Start the engine. Go back to the radiator while the engine is idling. Any bubbles will indicate a leaking head gasket or cracked head or both. Or maybe the head bolts aren't proper....was a bulletin for that on some of them as I remember.
 

Mikestolarik

Member

Equipment
SVL95-2s
Feb 14, 2022
58
7
8
Florence, Alabama
any leaks? Coolant ever low? Do you have to add any at any time?

Next thing to look at. Engine cold in the morning take the radiator cap off. Start the engine. Go back to the radiator while the engine is idling. Any bubbles will indicate a leaking head gasket or cracked head or both. Or maybe the head bolts aren't proper....was a bulletin for that on some of them as I remember.
Hi, nope, no leaks anywhere.
I haven’t checked the radiator for small bubbles. I’ll do that tomorrow morning.