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Kristi KT7 restoration

Snowtrac Nome

member formerly known as dds
GOLD Site Supporter
I don't think a uv-5 would be what I would use you might want to look at a high powered dedicated mobile rig. or if you are savvy enough a bendix king radio with a docking station I still would rather have a high power mobile type rig
 

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
Likely I will end up like JimVt with several radios (just for fun).

The dashboard is back in, I started working on the wipers that weren't working, wires cut ? and then the motors wouldn't turn (sitting too long) motors looked good inside .Got them working but need to improve the motor mounting the starboard side and possibly mounting plates….
 

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
Started up tonight ~ 14volts, smooth idle at 800RPM, oil pressure is there , the transmission (hydro) temp after 20 min lifted off the pin but never made it to 150F, radiator temp staid about 135F and best of all no engine compartment leaks :smile:

I need to adjust the port hydraulic control. The track wants to move backwards at idle if I don't push the lever forward.The starboard hydraulic control is adjusted correctly. Once I get it adjusted I'm going to load up on a trailer and head to the hydraulic shop for review by a pro that knows if Al had it right. Being able to tow it off the hill's a big deal so want to make sure I have that right.
 

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
Also need to get a governor in to keep it below 2800 for the hydro not sure how thats going to play out. Any ideas ?
 

300 H and H

Bronze Member
GOLD Site Supporter
I would use a belt driven one.. Electronic governor's typically interrupt spark and cause a miss when they hit their limit's.

Belt drive, or mechanical governors only let the throttle blade open far enough to maintain your engine RPM's. Woodward is what Caterpillar used on old generator sets. Time for a google search..

Regards, Kirk
 

MNoutdoors RIP

Gone But Not Forgotten
GOLD Site Supporter
Well let's hope your hydraulic expert can point you in the right direction. With the KT7 you never really know if your coming or going :yum: unless the headlights are on.

As previous indicated I think Al was misdirected on the two speed. I read through all his posts when he was having trouble with the machine always thinking it really had two speed, and I'm sure he did also.

But upon All the research I've done I do believe it is only single speed. The brochure never had any indication of two speed either. Not that it meant much as this was a prototype per say.

I did finally find the control block in some info for the new holland skid steer
And the reference on that spool that yours has is indicated as bypass valve which means it was used for when the engine is down and you would had needed to tow it back someplace so not to damage the hydrostatic system

But getting back to when he was having trouble he said when he tried to go to
What he thought was high speed the sticks would just go dead and they would because he was loosing his charge pressure ( it was bypassing )

The lever opens up the oil flow to recirculate

So if you really wanted to test this theory you could jack up one or both sides of the machine and put it in (high) or (bypass mode)and if you can with some effort Move the tracks you know for sure that's what it intended to do.

You could just leave everything on the ground and give it a gentle pull in ( high ) also Because I believe Al has towed the machine before and normally if this was actually a high range there would be a lot of resistance.

I wished I would have caught this when Al had it. It may have saved him a lot of grief and time and money :sad:

Anyway I hope you can prove this wrong, but at this time with the research I've done from over a thousand miles away this is what I've come up with.

Good luck :flowers:
 

MNoutdoors RIP

Gone But Not Forgotten
GOLD Site Supporter
Just as a notation the old new holland skid steers that had two speed had a different drive motor that was adjustable and had a knob on the side and the way they were doing it was by moving the knob in one or the other position they were changing the swash plate in the motor from max stroke to min stroke.

The KT7 has a fixed displacement hydraulic drive motor and is not adjustable :ermm:


The part diagram is for the new holland skid steer
 

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300 H and H

Bronze Member
GOLD Site Supporter
Interesting..

I didn't know that the swash plate in the motor would have two positions. In the system's I am familiar with there is a sleeve about the wheel motor center axis, that acts as a block to block the flow to one half of the pistons in the motor, reducing displacement, and doubling the speed as a consequence..

This is so much simpler that those systems..

I wish Big Al would have known that there was really nothing wrong with this system. If he had, my bet is maybe he would have found one of those old skid steer's. :wink::flowers:

Thanks for the lesson boggie.. :smile:

Regards, Kirk
 
The Thiokol Hydromaster had a two speed motor too. It had a variable controlled swash plate in the motor like Boggie described. A foot switch in the cab operated a electric over hydraulic valve on the motor that moved the swash plate. Later on the LMC 3700 and other models had a 3 speed motor.

There are hydraulic motors that you can control the swash plate infinitely with a control.Set the pump to one speed/output and then control the motor.
 

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
I don't think Al has the right engine oil filter on it. Its a Napa 1516 oil filter (thats not full flow)? the 1516 has a bypass. How would that effect oil pressure ????
 

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
It's the right filter full flow


Wix 51516 & Napa 1516 Oil Filter
Wix 51516 & Napa 1516 Oil Filter
51516
Retail Price: $6.69
Your Price: $4.03
Case Qty: 1

At $125 order: $3.62

At $200 order: $3.22

Availability: In Stock



0
PRODUCT DETAILS
"PARTS DETAIL
Principal Application: Ford/Lincoln/Mercury (81-09), Chrysler/Jeep/Mitsubishi (02-09), Mazda Trucks (94-10), Various Industrial Equipment
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 4.828
Outer Diameter Top: 2.921
Outer Diameter Bottom: Closed
Thread Size: 3/4-16
By-Pass Valve Setting-PSI: 8-11
Anti-Drain Back Valve: Yes
Beta Ratio: 2/20=14/31
Burst Pressure-PSI: 275
Max Flow Rate: 7-9 GPM
Nominal Micron Rating: 21"
 

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
lookie what at what I found
 

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Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
Funk is the gearbox manufacturer the one that feeds the two hydros
If your looking for the pump motor numbers there in ALS old posts
Along with the guy that rebuild them in CA.

Going to look now for those pump numbers
 

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
Love the barrel sauna...!!! Electric/Gas/Wood?


We have a PV system on our garage so we went electric. Took a day to do the pad and a day to build the barrel.

I spoke to the Hydro guy today need to take some time off work to get into see him. I want to haul the trailer to L S for a check on the brakes first.
 

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter

Helmsman38

Member Formerly Known As Kristi KT7
GOLD Site Supporter
Well let's hope your hydraulic expert can point you in the right direction. With the KT7 you never really know if your coming or going :yum: unless the headlights are on.

As previous indicated I think Al was misdirected on the two speed. I read through all his posts when he was having trouble with the machine always thinking it really had two speed, and I'm sure he did also.

But upon All the research I've done I do believe it is only single speed. The brochure never had any indication of two speed either. Not that it meant much as this was a prototype per say.

I did finally find the control block in some info for the new holland skid steer
And the reference on that spool that yours has is indicated as bypass valve which means it was used for when the engine is down and you would had needed to tow it back someplace so not to damage the hydrostatic system

But getting back to when he was having trouble he said when he tried to go to
What he thought was high speed the sticks would just go dead and they would because he was loosing his charge pressure ( it was bypassing )

The lever opens up the oil flow to recirculate

So if you really wanted to test this theory you could jack up one or both sides of the machine and put it in (high) or (bypass mode)and if you can with some effort Move the tracks you know for sure that's what it intended to do.

You could just leave everything on the ground and give it a gentle pull in ( high ) also Because I believe Al has towed the machine before and normally if this was actually a high range there would be a lot of resistance.

I wished I would have caught this when Al had it. It may have saved him a lot of grief and time and money :sad:

Anyway I hope you can prove this wrong, but at this time with the research I've done from over a thousand miles away this is what I've come up with.

Good luck :flowers:

Hello Marco.

I am not finding anything on that spec number, but based on the model number provided, that is a 61000 series 2 pad pump drive. These are just single speed gear boxes. If you need more information, let me know and I can get with the factory for details on that spec.

Thanks Tom

Tom Adams
Palmer Johnson Power Systems
Direct Phone: 9132026928
sales@pjpower.com
www.pjpower.com

Transmission & Axle Specialists Since 1977

Twin Disc • ZF • Funk • AxleTech • Spicer • Durst
Carraro • Eaton Airflex • Wichita • Murphy


11/17/2015 21:54 - marc johnson wrote:
 

MNoutdoors RIP

Gone But Not Forgotten
GOLD Site Supporter
Hello Marco.

I am not finding anything on that spec number, but based on the model number provided, that is a 61000 series 2 pad pump drive. These are just single speed gear boxes. If you need more information, let me know and I can get with the factory for details on that spec.

Thanks Tom

Tom Adams
Palmer Johnson Power Systems
Direct Phone: 9132026928
sales@pjpower.com
www.pjpower.com

Transmission & Axle Specialists Since 1977

Twin Disc • ZF • Funk • AxleTech • Spicer • Durst
Carraro • Eaton Airflex • Wichita • Murphy


11/17/2015 21:54 - marc johnson wrote:





He is just referring to the Funk gearbox in front of your hydros.
 

MNoutdoors RIP

Gone But Not Forgotten
GOLD Site Supporter
Well here are a lot of assumptions but.

Assuming the engine is at 2800 rpm
And the hydro motor is the same cubic as the pump then at wide open you would get the same as the engine input 2800 rpms now the next assumption comes from a picture only of the right angle drive looks to be of bevel gear design I'm guessing 5 to 1 ratio then the next reduction comes from the clam shells. Next assumption comes from a picture counting teeth best I can looks to be double reduction of about 2.3 to 1 then the pitch of the sprocket comes from when Al had a square next to his belts looks like 6" and six pitches on the sprocket so with all that here goes

2800 divided by 5 ( right angle )=560 divided by clam shell 2.3 =244 sprocket
Rpms per minute 36" ( 6 pitches per rev ) 244x 36"=8784" per minute divided by 12 to get ft per minute = 732 x 60 minutes per hour =43920 divided by 5280
Feet per mile = 8.31 miles per hour

That's is rough without absolute verification :wink:
So to get more speed you need more rpms
 
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300 H and H

Bronze Member
GOLD Site Supporter
Boogie,

I think that you re about right with your calculations..

And it may actually be the cat isn't going to be as fast as say, a Tucker...

But from those I have run with it will be close.. :wink::flowers:

Regards, Kirk
 

MNoutdoors RIP

Gone But Not Forgotten
GOLD Site Supporter
Well here are a lot of assumptions but.

Assuming the engine is at 2800 rpm
And the hydro motor is the same cubic as the pump then at wide open you would get the same as the engine input 2800 rpms now the next assumption comes from a picture only of the right angle drive looks to be of bevel gear design I'm guessing 5 to 1 ratio then the next reduction comes from the clam shells. Next assumption comes from a picture counting teeth best I can looks to be double reduction of about 2.3 to 1 then the pitch of the sprocket comes from when Al had a square next to his belts looks like 6" and six pitches on the sprocket so with all that here goes

2800 divided by 5 ( right angle )=560 divided by clam shell 2.3 =244 sprocket
Rpms per minute 36" ( 6 pitches per rev ) 244x 36"=8784" per minute divided by 12 to get ft per minute = 732 x 60 minutes per hour =43920 divided by 5280
Feet per mile = 8.31 miles per hour

That's is rough without absolute verification :wink:
So to get more speed you need more rpms



Looking at the hydro page it does say 4000 rpm on the pump/motor combo
So let's use that in the equation and see what that would do.

That would give you 11.7 mph and have more power because of the higher rpm
Area that I would recommend to check. Would be where the arms come out of the pump make sure you have full travel of these with the cable controls this will affect the speed normal travel is about 20-22.5 degrees off center

The next area you could get more rpm would be the hydro motor its self it would
Need to be the adjustable kind like the skid steers used I believe it would just bolt on. Not sure if you have enough torque if you tried to reduce at the swash plate to half the displacement but you could reduce some and maybe get It to 15mph

But I think even at the 11.7 is not terrible

Hope this all helps :smile:
 

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