LHoyer
Silver Member
Does this shaft run off the front of the engine(crank) or mid mount(transmission)? I have a shaft at home that might be what you are looking for, I'll look at it tonight.
B7100 front PTO shaft impossible to find-HELP
- Thread starter wnner111
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- kubota b7100
Old School
Bronze Member
LHoyer said:
Comes off the mid mount (transmission) and is 10 splined on both ends
LHoyer
Silver Member
The Kubota shaft I have is 22 spline but it measures 27mm across the widest "lands".
Kubota In Canada
Member
LHoyer said:
Yes, I have that same part and it does look quite specialized .... mine better last a longtime!!
Anyone with a similar front-mounted snow thrower, I would appreciate some words of wisdom. I have a Kubota B648A Snow Caster and the belt system does not seem to be set up properly ..... it works, but not great.
Any pearls of wisdom? We received another 24 inches yesterday ..... up over 40 inches to date!!!
Cheers!
Eric
Quote, "matching it up" part that I'm having so much trouble with.
It is 18mm, 22 teeth or splines - apparently not a "standard"
I contacted many splined shaft manufacturers and nobody could help me.
One said I could buy several snowblowers for the cost of them making me the part.
They thought that this size was made by Kubota for Kubota only."
I've been conducting a similar search for a 22-spline PTO shaft to be driven by a Kubota B5100D 4WD diesel. The engine's rear crank projection is cut with 14 splines to drive the clutch which powers both the transmission and rear PTO. The engine's front crank projection is cut with 22 splines to drive this tractor's front PTO by first passing torque through an electric clutch.
From reading online discussions about these tractors, I understand that in the Japanese market, these tractors were NOT fitted with mowers. Since the US market requires belly mowers, Kubota contracted with a US fabricator to supply mowers to be offered by US Kubota dealers. Unfortunately, the US fabricator elected to make their PTO input shaft from cast iron! Machining a 22-spline female hole into the end of a cast iron shaft is NOT the kind of high-quality materials selection that caused Kubotas to become famous for durability and reliability. Eventually, those 22 brittle cast iron splines begin breaking. As they break, more load is carried by remaining spines until a pile of greasy splines lays on the cross member below that spinning coupling joint. Then the engine continues spinning while the front PTO drive shaft sits still. Several other B5100 series owners reported this same failure with that weak part. Kubota should offer to warranty all those failures due to the US fabricator's failure to adhere to Kubota's traditional quality control standards. But to this date, they have not elected to do that. If their engineers had made that part, it would not be cast junk.
Not only are finding replacement copies of that poorly-made US part bearing Kubota's brand and part number almost impossible to find, but I don't want another failure-prone replacement part unless one became available cheaply.
So I want a good hard 22-spline female coupling that I can have joined to the original shaft to drive the electric clutch.
I have found some possible 22-spline used part candidates so I want to share that research list.
I do not know the inside and outside diameters for these candidates.
From my notes:
Ford Courier 2.3 clutch disk center has 22-spline connector
Mazda 1989 B222 clutch disk center has 22-splines
Mazda B2000 Pickup Clutch Kit 1979-1985 Ford Truck
Spline Teeth / Major Diameter 22T / 15/16in
Part Fits:
FORD
1979 - 1982 COURIER BASE "L4; 2.0L, 2.3L; Non-Turbo; Gas(ALL)"
MAZDA
1979 - 1979 B2000 BASE L4; 2.0L; Non-Turbo; Gas (ALL)
1980 - 1984 B2000 BASE L4; 2.0L; Non-Turbo; Gas (ALL)
1979 - 1982 RX-7 BASE From 4/79 Production Date; R2; 1.1L; Non-Turbo; Gas (ALL)
1979 - 1979 RX-7 BASE Thru 3/79 Production Date; R2; 1.1L; Non-Turbo; Gas (ALL)
1994-2005 Mazda Miata Clutch,
One report said Yamaha XS859 shaft drive yokes have 22 spline connections.
Some Polaris All Terrain Vehicle ATV CV Joints mate through 22-splines
Chrysler FWD 1989 and up torque converters have 22-splines
Eclipse Talon AWD 1G DSM Manual Transfer Case 22-spline
Suzuki Samurai and Tracker use Front Axle Shafts Set 4x4 22-Spline
Standard size 22 spline; 24.3mm hub Inside Diameter = .9574"
There is no reason to assume all potentially-available 22-spline female couplers have identical inside and outside diameters. I've seen tall splines and I've seen short splines. One way to make sure a female 22-spline connector candidate will couple nicely with your Kubota part is to clean the shaft really well, apply some lubricant to act as "mold release," then cover with a few pennies worth of paster of paris to make a negative casting. When it cures and becomes rigid, slide off the casting. Then use ordinary model-making techniques to cast a duplicate copy of your original 22-spline shaft. If that copy properly fits into any candidate 22-spline female donor part, you have verified that you have found a workable match. Post results so others may benefit from that research.
I hope some worn-out Mazda clutch will turn out to be a suitable donor.
If anyone thinks they know which parts are suitable to recouple this PTO connection, please post that information.
John
It is 18mm, 22 teeth or splines - apparently not a "standard"
I contacted many splined shaft manufacturers and nobody could help me.
One said I could buy several snowblowers for the cost of them making me the part.
They thought that this size was made by Kubota for Kubota only."
I've been conducting a similar search for a 22-spline PTO shaft to be driven by a Kubota B5100D 4WD diesel. The engine's rear crank projection is cut with 14 splines to drive the clutch which powers both the transmission and rear PTO. The engine's front crank projection is cut with 22 splines to drive this tractor's front PTO by first passing torque through an electric clutch.
From reading online discussions about these tractors, I understand that in the Japanese market, these tractors were NOT fitted with mowers. Since the US market requires belly mowers, Kubota contracted with a US fabricator to supply mowers to be offered by US Kubota dealers. Unfortunately, the US fabricator elected to make their PTO input shaft from cast iron! Machining a 22-spline female hole into the end of a cast iron shaft is NOT the kind of high-quality materials selection that caused Kubotas to become famous for durability and reliability. Eventually, those 22 brittle cast iron splines begin breaking. As they break, more load is carried by remaining spines until a pile of greasy splines lays on the cross member below that spinning coupling joint. Then the engine continues spinning while the front PTO drive shaft sits still. Several other B5100 series owners reported this same failure with that weak part. Kubota should offer to warranty all those failures due to the US fabricator's failure to adhere to Kubota's traditional quality control standards. But to this date, they have not elected to do that. If their engineers had made that part, it would not be cast junk.
Not only are finding replacement copies of that poorly-made US part bearing Kubota's brand and part number almost impossible to find, but I don't want another failure-prone replacement part unless one became available cheaply.
So I want a good hard 22-spline female coupling that I can have joined to the original shaft to drive the electric clutch.
I have found some possible 22-spline used part candidates so I want to share that research list.
I do not know the inside and outside diameters for these candidates.
From my notes:
Ford Courier 2.3 clutch disk center has 22-spline connector
Mazda 1989 B222 clutch disk center has 22-splines
Mazda B2000 Pickup Clutch Kit 1979-1985 Ford Truck
Spline Teeth / Major Diameter 22T / 15/16in
Part Fits:
FORD
1979 - 1982 COURIER BASE "L4; 2.0L, 2.3L; Non-Turbo; Gas(ALL)"
MAZDA
1979 - 1979 B2000 BASE L4; 2.0L; Non-Turbo; Gas (ALL)
1980 - 1984 B2000 BASE L4; 2.0L; Non-Turbo; Gas (ALL)
1979 - 1982 RX-7 BASE From 4/79 Production Date; R2; 1.1L; Non-Turbo; Gas (ALL)
1979 - 1979 RX-7 BASE Thru 3/79 Production Date; R2; 1.1L; Non-Turbo; Gas (ALL)
1994-2005 Mazda Miata Clutch,
One report said Yamaha XS859 shaft drive yokes have 22 spline connections.
Some Polaris All Terrain Vehicle ATV CV Joints mate through 22-splines
Chrysler FWD 1989 and up torque converters have 22-splines
Eclipse Talon AWD 1G DSM Manual Transfer Case 22-spline
Suzuki Samurai and Tracker use Front Axle Shafts Set 4x4 22-Spline
Standard size 22 spline; 24.3mm hub Inside Diameter = .9574"
There is no reason to assume all potentially-available 22-spline female couplers have identical inside and outside diameters. I've seen tall splines and I've seen short splines. One way to make sure a female 22-spline connector candidate will couple nicely with your Kubota part is to clean the shaft really well, apply some lubricant to act as "mold release," then cover with a few pennies worth of paster of paris to make a negative casting. When it cures and becomes rigid, slide off the casting. Then use ordinary model-making techniques to cast a duplicate copy of your original 22-spline shaft. If that copy properly fits into any candidate 22-spline female donor part, you have verified that you have found a workable match. Post results so others may benefit from that research.
I hope some worn-out Mazda clutch will turn out to be a suitable donor.
If anyone thinks they know which parts are suitable to recouple this PTO connection, please post that information.
John
Last edited:
I emailed inquires to numerous potential coupler sources, most of which are NOT intending to offer couplers separately from products which include them. One of those offered 22-spline "ZOOM Saturn Kevlar Clutch Disc 91-99 D1012CB 1.9L I4." I tried to count splines in their photo but, even after enlarging it, I couldn't confirm that it showed 22 splines. So I wrote to them asking if their clutch disk coupler really has 22 splines.
I just got their response:
"The 1012CB disc has 22 splines.
I just counted them myself.
We don't have any type of connector though, only what's pictured.
Thanks"
1.9 liter inline 4-cylinder Saturn cars are common compared to 22-spline Kubota couplers. Next I'll try to get inside diameter, outside diameter, and depth measurements describing Saturn clutch female center couplers. If their dimensions are compatible with Kubota 22-spline shafts, a worn out Saturn clutch disk would be a suitable donor. Perhaps a clutch rebuilding service would be willing to sell a "core." If any of you reading this has access to one of these new or used disks and measuring tools, please measure those dimensions and post them.
Thanks,
John
I just got their response:
"The 1012CB disc has 22 splines.
I just counted them myself.
We don't have any type of connector though, only what's pictured.
Thanks"
1.9 liter inline 4-cylinder Saturn cars are common compared to 22-spline Kubota couplers. Next I'll try to get inside diameter, outside diameter, and depth measurements describing Saturn clutch female center couplers. If their dimensions are compatible with Kubota 22-spline shafts, a worn out Saturn clutch disk would be a suitable donor. Perhaps a clutch rebuilding service would be willing to sell a "core." If any of you reading this has access to one of these new or used disks and measuring tools, please measure those dimensions and post them.
Thanks,
John
Updating this search with more recent 22-spline findings:
Some Mazda clutch disks have 22-spline 0.9375" or 15/16" shaft diameter
Deutz Allis 7120 tractor 22-spline clutch disk center holes measure 1.875"
Inland Empire Driveline Transmission Yoke descriptions:
Part # Splines Major-Spline-Diameter Ground-Hub-Diameter Brand
2603-22 20/22 .959" 1.375" Mazda
2303-22 20/22 .985" 1.258" Toyota
1203-24 22/24 .995" 1.375" Nissan/Subaru
1203-24S 22/24 .995" 1.375" Nissan
3103-24 22/24 .995" 1.375" Nissan
PowerTrain Technology Racing Clutch & Driveline Chart Listings
22-Splines
Nominal Input Shaft O/D inches --- 15/16"
Measured Input Shaft O/D inches --- .942"
Measured Input Shaft O/D mm --- 23.9mm
Applications:
Ford Escort, EXP, ZX2 & Probe; Kia Sephia, Spectra & Sportage; Mazda 323, GLC, 616, 618,
626, MX-6, 808, 1800, Cosmo, Miata, MX-5, MX-3, Prot馮? RX-2, RX-3, RX-4 & RX-7;
Mercury Tracer; Saturn All Models
1992 Volkswagon Corrado steering rack & pinion by ZF had 22-spline input shaft
Math description:
360 degree circle divided into 22 equal sections
are 16.3636 degrees per spline
Some Mazda clutch disks have 22-spline 0.9375" or 15/16" shaft diameter
Deutz Allis 7120 tractor 22-spline clutch disk center holes measure 1.875"
Inland Empire Driveline Transmission Yoke descriptions:
Part # Splines Major-Spline-Diameter Ground-Hub-Diameter Brand
2603-22 20/22 .959" 1.375" Mazda
2303-22 20/22 .985" 1.258" Toyota
1203-24 22/24 .995" 1.375" Nissan/Subaru
1203-24S 22/24 .995" 1.375" Nissan
3103-24 22/24 .995" 1.375" Nissan
PowerTrain Technology Racing Clutch & Driveline Chart Listings
22-Splines
Nominal Input Shaft O/D inches --- 15/16"
Measured Input Shaft O/D inches --- .942"
Measured Input Shaft O/D mm --- 23.9mm
Applications:
Ford Escort, EXP, ZX2 & Probe; Kia Sephia, Spectra & Sportage; Mazda 323, GLC, 616, 618,
626, MX-6, 808, 1800, Cosmo, Miata, MX-5, MX-3, Prot馮? RX-2, RX-3, RX-4 & RX-7;
Mercury Tracer; Saturn All Models
1992 Volkswagon Corrado steering rack & pinion by ZF had 22-spline input shaft
Math description:
360 degree circle divided into 22 equal sections
are 16.3636 degrees per spline
I am a field mechanic in the mountinas in southern california, I have a customer with a b7100 and a modell 222 snow blower on the front and his shaft also stripped out the splines that are 27 mm and 22 tooth. Its an odball size spline not available from Kubota ot any where else, what I did and it worked great was cut the weld where the spline was pressed on the one inch shaft, the spline is like 1.17 inches so ther was enough spline there to turn the spline coupler around and I centered the spline in my lathe and weld the stripped of end back on the shaft and I reuded the spline that way, worked great not 100% but i would guess over 50 and it should last a long time or at least till i find a new one or a spline 27mm by 22 teeth, any one with other eideas let me know but at least it is working we have lots of snow now and i have a happy customer, Bob
I have a B6100 with a Kubota B748B snowblower powered by an electric PTO which is connected to the crankshaft via a shaft/crank pulley adapter. The model number for the PTO/shaft assembly is B9310.
I recently replaced the shaft/crank pulley adapter/electric PTO. These parts ARE available from Kubota - but they use the gold standard for pricing.
Also, please bear in mind that if you're replacing the shaft, you should also plan on replacing the shaft bearing. The electric PTO also has a bearing - but not sure if that bearing can be replaced separately.
70090-00104; CLUTCH ASSY
Subtotal: $313.64, Taxes: $0.00
66704-88530 1 FLANGE, PTO ( Front PTO) 77.15 $77.15
66704-88540 1 SHAFT, PTO (Front PTO) 113.48 $113.48
I have a pdf file with the schematic/part numbers. Let me know if you want an electronic copy.
Hope this helps.
I recently replaced the shaft/crank pulley adapter/electric PTO. These parts ARE available from Kubota - but they use the gold standard for pricing.
Also, please bear in mind that if you're replacing the shaft, you should also plan on replacing the shaft bearing. The electric PTO also has a bearing - but not sure if that bearing can be replaced separately.
70090-00104; CLUTCH ASSY
Subtotal: $313.64, Taxes: $0.00
66704-88530 1 FLANGE, PTO ( Front PTO) 77.15 $77.15
66704-88540 1 SHAFT, PTO (Front PTO) 113.48 $113.48
I have a pdf file with the schematic/part numbers. Let me know if you want an electronic copy.
Hope this helps.
Morton I would appreciate a copy of that .pdf. I'm having the same issue as others trying to add a B648 to a B7100.
Even though I find part numbers that appear online to still be available, when ordered I'm told they no longer are available. Seems with the crumbling Japan economy (and crumbling US economy!) they are purging parts that don't have high turns. Were you able to purchase those parts recently?
Thanks,
Even though I find part numbers that appear online to still be available, when ordered I'm told they no longer are available. Seems with the crumbling Japan economy (and crumbling US economy!) they are purging parts that don't have high turns. Were you able to purchase those parts recently?
Thanks,
