G1800 (D662) alternator needed

jas67 · Aug 20, 2008

I can't win with this G1800. The fuel pump failed last week. During the first mowing after replacing that, now the alternator is seized up

List price is a whopping $202 !

!

Any pointers on where to get a rebuilt, or even a used one for a bit less?

I found one site that lists this as the same alternator for the following:
Tractors:
B20 D950AT 20HP Diesel (90-ON)
B20TL D950AT 20HP (90-ON)
F2000 D950-FM 20HP Diesel (86-94)
G1800 D662 16HP Diesel (89-95)
G1800S D662 16HP Diesel (89-95)
G1900 D722 18HP Diesel (89-95)
G2000 WG750-G 21HP Gas (89-95)
G3200 Z400 10HP Diesel (83-90)
G4200H Z430 12HP Diesel (84-90)
G5200H D600 14HP Diesel (84-90)
G6200H D640 16HP Diesel (86-90)
GF1800E D722 18HP Diesel (03-bk)
GF1800R D722 18HP Diesel (03-bk)
T1600H Z482 13.5HP Gas (90-95)
Excavators:
KH35 D850BH 13.7HP Diesel (85-on)
KH41 D950 17.8HP Diesel (88-on)
KH61 D950BH 22.2HP Diesel (88-on)
Mowers:
ZD18 D722 18HP Diesel (03-bk)
ZD21 D782 21HP Diesel (03-bk)
ZD28 D1105 28HP Diesel (03-bk)

From Messick's website:
Brand: Kubota
Replaces: 15531-64012, 15531-64013, 15531-64014, 15531-64015, 15531-64016
In Stock: No
Stock Quantity: Availabe in 3-5 business days
Price: $202.00ea.

This Part Fits at least the following tractors.
BX2230 BX1830 B20 B2150HSD B8200 B9200D
B1550 B1750 B6200 B7200 G1800 G1900
G2000 G4200 G5200 G6200 GF1800 F2000
B7410 BX1500 BX1800 BX2200 BX22 BX23
GR2100 B1550HST B1750HST B2150 T1600H B1550D
B5200D B6200HST B7200HST B8200HST B9200HST G3200
T1600H-G

Thanks in advanced!
jas67

moeh1 · Aug 20, 2008

What does it look like? Is it a dynamo with an external voltage regulator or an actual alternator. I recently upgraded my '92 B2150 to a 40 amp alternator and I still have the little 12-13 amp dynamo I took off. I don't have my parts list with me so I can't give you the stock number of mine right away.

jas67 · Aug 20, 2008

It looks like this, only mine is painted Kubota grey:

Here is another view from an ebay listing:

'

The whole outside part behind the pully (with the letters IMP on it, in the picture) turns with the pully.

According to Messick's list, the one from your B2150 is the same one.
How much do you want for it?

Thanks,
Jay

jas67 · Aug 21, 2008

Iowa Motor Parts sells replacement bearings for this model alternator:
Kubota Alternators

Has anyone here rebuilt one of these? I haven't tried to take it apart yet, but it seized suddenly. I was mowing one minute, the next, there was a horrible squeal, and the alternator light came on.

I immediately shut it down to investigate. I assumed that the belt was about to break. When I restarted it to drive it back over to the garage, the belt did break. Upon further investigation, the alternator is difficult to turn, but not completely locked up, so maybe, for $12 worth of replacement bearings (the above website says it takes three of the bearings shown).

Thanks,
jas67

moeh1 · Aug 21, 2008

I sent you a PM back

jas67 · Aug 21, 2008

I took my alternator apart today. The previously "sealed" bearings are toast. One fell apart as I removed it. The two on the rotor are frozen on to it. I'm not sure out to get them off yet. The rotor is kinda like a cup with magnets around the inside of it, and a shaft running through the middle. The bearings are stuck on the shaft, down in the cup, so it will be tough to get them out.

If I can get the bearings out, I'll rebuild this one to keep as a spare (or use it if I get it back together before the one I'm buying arrives).

David_Kb7uns · Aug 23, 2008

Have seen some of the Kubota Dynamo take offs on ebay in the $60 range. When people were upgrading there BX tractors to the 40A alternator and were left with the dynamo and regulator.

David Kb7uns

jas67 · Aug 25, 2008

I was able to rebuild my alternator for $11.85 + shipping.
See this thread:
http://www.tractorbynet.com/forums/showthread.php?p=1471150#post1471150

rkvarner43 · Oct 5, 2013

Just replaced one of the bearings in my GF1800E alternator (used on multiple Kubota products). Used a 6201zz bearing, also found this video describing how to remove and install the bearing.

"GRASSHOPPER 721D MOWER REPAIR" HOW TO REPLACE THE BEARINGS IN THE ALTERNATOR/GENERATOR - YouTube

Ken
1993 GF1800E
1990 Ford 4610 SU
19xx IH Super C

Kubota3710 · Apr 23, 2016

Great thread. I just replaced the bearings on my Dynamo for a Kubota G1800. The parts diagram said three bearings, but there were only two when I took it apart. Not sure? ? Prett easy and $7 per bearing from local Kubota dealer who had them in stock. Cleaned up bearing surfaces with emery cloth and used light weight oil to get them to go in easily.

Some pictures since those are better than words.

First picture you are looking at the plate (opposite side from stator) and can see the new bearing in the bottom of the dynamo already installed. The bushing and 2nd bearing in the picture go on top of the already installed bearing. You tap the bearing in until it rests against the lip in the hole.