B2650 Cab Fan Blower Won't turn on??

flinn101

New member

Equipment
B2650 Full Cab
Aug 24, 2019
4
0
0
Monclova, OH
The blower fan in my cab won't turn on. Its not the fuse. It started acting up last week and would come on 20 seconds after the tractor was started. Now, nothing. I have power to the switch.

Thoughts? Is there a presssure switch on the system?

Also, with the humidity in Ohio I do get plenty of water dripping inside during the hot summer months.

Where to start? Thanks
 

Orange1forme

Member

Equipment
B2650 HSDC, filled tires, wheel spacers, B2728B , LA534A FEL, 3rd valve kit
Dec 1, 2018
213
0
16
Wa
If power to the switch and it did work for a short time, probable a bad motor.
 

RCW

Active member
Lifetime Member

Equipment
BX2360, FEL, MMM, BX2750D snowblower. 1953 Minneapolis Moline ZAU
Apr 28, 2013
4,151
24
38
Chenango County, NY
I had a similar problem with a pickup years ago. It wasn’t a bad motor, which is certainly possible too....
Wracking my old pea-brain to recall my fix....all I’m coming up with is a relay but not sure at all.
Maybe look at the illustrated parts diagrams and see if there’s something in there??
Just throwing out an idea....again, it was a truck, so may not apply.


Sent from my iPhone using Tapatalk
 
Last edited:

Fordtech86

Well-known member
Lifetime Member

Equipment
L3200,la525,LP 5’bushhog,LP 5’disc,LP boxblade,2bottom plow,40 gal sprayer
Aug 7, 2018
1,281
49
48
Pineville,LA
Is the blower motor easily accessible in that? If so turn the the blower on and tap on the motor with a small hammer. Could be the brushes in the motor stuck. Just a thought.
 

flinn101

New member

Equipment
B2650 Full Cab
Aug 24, 2019
4
0
0
Monclova, OH
No easy access without taking the head liner out. I was just hoping for a known easy solution that someone troubleshooted in the past. Thanks
 

Cglaza

Member

Equipment
L2500DT, BX2380, G6200H
Aug 30, 2015
169
0
16
Freeland, mi
If you have power to the motor that will carry a load, then bad motor

Sent from my XT1710-02 using Tapatalk
 

BAP

Active member
Lifetime Member

Equipment
2012 Kubota 2920, 60MMM, FEL, BH65 48" Bush Hog, 60"Backblade, B2782B Snowblower
Dec 31, 2012
1,669
4
38
New Hampshire
Water dripping when humid is a common issue in all tractor air conditioners when they get dirt in them and the condensation drains get plugged up. Sounds like you need to give it a good cleaning while checking your fan out.
 

DeepWoods

Member

Equipment
B2650HSDC
Apr 10, 2019
101
2
18
Bigfork Minnesota
With all the reading i 've done here, if I'm not mistaken, you can access the fan motor by removing the top cap of the cab. I think everything in the roof of the cab is accessible after removing the cap. When my air conditioner is running there is almost a steady stream of water coming from the two condensation lines under the cab. Maybe a mud dauber plugged one of the lines and the water caused the motor to fail. I would have thought the fuse would have blown, but maybe part of the wiring corroded from the water. Just some random thoughts.
 

wgator

Member

Equipment
L4701HST, FEL
Jul 28, 2018
221
12
18
Eastern NC
If you don't already have the workshop manual, download it from kubotabooksdotcom free BY CLICKING HERE. Section 10 has procedures for checking the fan switch, fan motor, fan relay, etc.
 

Dave_eng

Well-known member
Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
2,841
42
48
Williamstown Ontario Canada
The blower is switched on by a relay that the blower switch controls.

Check your relay panel and find an identical relay and swap for the blower relay.

You might get lucky.

Dave
 

flinn101

New member

Equipment
B2650 Full Cab
Aug 24, 2019
4
0
0
Monclova, OH
Took the top cap off the cab. Fan started when I started it by hand. Relay tests fine. Waited an hour and fan WOULDN’T start on it’s on own. It’s either the resistor or the motor. I’ll test and replace accordingly. Does anyone have the kubota part numbers for the fan and resistor? I’m assuming aftermarket (or the company that makes OEM under a diff name) is available? Thoughts?