yanmar 3t75u

[doug-HT]

after a rebuild the governer on my 1610d doesent work it runs away . how hard is it to take the front off the motor to get at it

 

[Aaron-HT]

Are you sure it is the governor and not the injection pump? Sometimes the pump racks get sticky and will cause that. The rack should move just by tipping the pump side to side. I know a lot of people end up in a troubleshooting downward spiral when messing with the governor so be organized and document any changes you make.

The service manual says:
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[doug-HT]

is there a way to see if the rack is moving without pulling the pump. it runs great but eather starts reving faster and faster or kills. had a spun bearing so they ground the crank. new pistons-rods and bearings. the rebuilder says its put togather corectly.

 

[Aaron-HT]

Yes, you just need to remove the inspection plate.

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[TractorGuy-HT]

From the exploded view above I can see the thingy to connect hourmeter cable to #22, mines leaking diesel just by the cable connection, is this a common place to leak from? Any servicable gaskets/O-rings there or just need to replace the whole hourmeter cable?

 

[Aaron-HT]

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There should not be any diesel in that area unless a fuel line was leaking &amp; dripping down there. The front cover is just open to the crankcase and should be full (to dipstick level) of engine oil.

 

[doug-HT]

i thought that was just a holder for the throtal. ishould buy a service manual. do you carry one for the 3t75u thanks for the info

 

[Aaron-HT]

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Yes in the link below
https://www.hoyetractor.com/PROD/Yanmarsm.htm

 

[doug-HT]

the rack slides back and forth easly. do i have to disconnect anything internal to remove the front of the motor and would it be obviouse if there was something wrong in there

 

[Aaron-HT]

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No. Not that I can think of.

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Probably not unless it was something relatively catastrophic.

 

[doug-HT]

i bit the bullet and ordered the service manual. i am a little afraid to pull the front off. could be like a watch an stuff falls out everywhere"hope not" does the governor run off a gear and if so,will that stay with the front. should get the manual monday. nobody up here in northern wis. that i can find that works on yanmars.

 

[Aaron-HT]

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It is pretty much all self contained in there. The little fork with the 2 pins (in the bottom right of the picture) slides into a governor flywheel on the crankshaft.

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[doug-HT]

pulled front off it was quite obvious what went wrong. the governer weights were ripped off the big washer looking thing. got very lucky they didnt get in the gears. must have been not put togather right. hope they have the part in stock. any hints when i put it back togather. they might put the sleeve in backward cause it came out with the case. got the part ordered along with a new gasket .

 

[doug-HT]

got it back togather runs great think i got the rpm controler in a bit too far only 1800 rpm but i can fix that. my buddy got i too big a hurry with air wrench didnt have rpm thing in the slot and broke it now i need that part couldnt find it on the hoye site if you can find it give me the number

 

[winston-HT]

Is this the part you are looking for? 121450-91400 https://www.hoyetractor.com/PROD/121450-91400.htm

 

[doug-HT]

thats it .thanks

 

[doug-HT]

ya . kind of spendy but where do ya find another one. got a little over five grand in the little tractor. new motor shoulld last for many years

 

[doug-HT]

got the part. all back togather. turned the rpm limiter out a little cranks up to 2400 rpm, the book says 2725, not sure if i need it to go that high. is it for when your working it hard.

 

[Aaron-HT]

It looks like the max horsepower is rated at 2,600rpm so I would probably get it to at least 2,600. Might be worth checking with an external tachometer just to be sure the gauge is accurate.

 

[Murray_YM1601D]

Are you sure it is the governor and not the injection pump? Sometimes the pump racks get sticky and will cause that. The rack should move just by tipping the pump side to side. I know a lot of people end up in a troubleshooting downward spiral when messing with the governor so be organized and document any changes you make.

The service manual says:
<ATTACHMENT filename="1.JPG" index="0"><s>[attachment=0]</s>1.JPG<e>[/attachment]</e></ATTACHMENT>

Hello,
I am having a similar run away throttle issue and am looking to buy a service manual for my ym1601d, can you recommend a place to buy one?

 

[Murray_YM1601D]

i bit the bullet and ordered the service manual. i am a little afraid to pull the front off. could be like a watch an stuff falls out everywhere"hope not" does the governor run off a gear and if so,will that stay with the front. should get the manual monday. nobody up here in northern wis. that i can find that works on yanmars.

Hello,
I am having a similar run away throttle issue and am looking to buy a service manual for my ym1601d, can you recommend a place to buy one?

 

[bmaverick]

Hello,
I am having a similar run away throttle issue and am looking to buy a service manual for my ym1601d, can you recommend a place to buy one?

The fuel pump governor has broken. These fuel pumps are really touchy to mess with.
Matt has a great video covering all aspects of the governor.

Now, if it's the fuel pump itself, most everyone reaches out to Mike.

Mike the pump guy - Master Injection Pump Rebuilder
For Japan made tractors, namely many of the brands including Yanmar for fuel pumps.
Mike can be reached on our message board from time-to-time, The best way is via email he typical monitors very often at:
thepumpguyscATaol.com
(Replace the AT with the @ symbol when emailing please)
- Mike has 35+ years in the industry with injection pumps and hydraulic systems.
- He is very well versed in the JIS and SAE standards for parts to ensure proper components are used for rebuilds.
- From Sunny South Carolina.
- When sending parts via mail, please be sure to have insurance for a bit more than what you can find it new due to carrier issues that 'could' happen.
There are many positive testimonies on many of the Industrial Equipment, Heavy Equipment, diesel boating, tractor and other forums on his work and professionalism.
Shout out to The Pump Guy | Heavy Equipment Forums
(2) Thepumpguysc rocks - TractorByNet
Timing fuel injection pump - Yesterday's Tractors (yesterdaystractors.com)
Ford 3600 leaking from where fuel inlet meets injector | My Tractor Forum
The Pump Guy - Yesterday's Tractors (yesterdaystractors.com)

 

[winston-HT]

The manual closest to your tractor would probably be the 220/226 manual. Not sure it is available here. A phone number is given. Might be worth a call. https://www.tractorpartsasap.com/service-manual-new-yanmar-133504.html

 

[Murray_YM1601D]

The fuel pump governor has broken. These fuel pumps are really touchy to mess with.
Matt has a great video covering all aspects of the governor.

Now, if it's the fuel pump itself, most everyone reaches out to Mike.

Mike the pump guy - Master Injection Pump Rebuilder
For Japan made tractors, namely many of the brands including Yanmar for fuel pumps.
Mike can be reached on our message board from time-to-time, The best way is via email he typical monitors very often at:
thepumpguyscATaol.com
(Replace the AT with the @ symbol when emailing please)
- Mike has 35+ years in the industry with injection pumps and hydraulic systems.
- He is very well versed in the JIS and SAE standards for parts to ensure proper components are used for rebuilds.
- From Sunny South Carolina.
- When sending parts via mail, please be sure to have insurance for a bit more than what you can find it new due to carrier issues that 'could' happen.
There are many positive testimonies on many of the Industrial Equipment, Heavy Equipment, diesel boating, tractor and other forums on his work and professionalism.
Shout out to The Pump Guy | Heavy Equipment Forums
(2) Thepumpguysc rocks - TractorByNet
Timing fuel injection pump - Yesterday's Tractors (yesterdaystractors.com)
Ford 3600 leaking from where fuel inlet meets injector | My Tractor Forum
The Pump Guy - Yesterday's Tractors (yesterdaystractors.com)

Thank you for all of the great information I will follow up.

 

[Murray_YM1601D]

The manual closest to your tractor would probably be the 220/226 manual. Not sure it is available here. A phone number is given. Might be worth a call. https://www.tractorpartsasap.com/service-manual-new-yanmar-133504.html

Thank you sir, I was able to find a manual that turned out to be adequate and in english
I bought a digital copy from a gentleman on ebay https://www.ebay.com/itm/305702999405
My cross over connection point was when I was able to identify that they were selling an injector pump on amazon that would fit both the JD 750 and my yanmar 1601D. The truth is, yanmar was building (motor, injector pump, etc) for John Deer at the same time or right after they were building for the Yanmar name in the years around 1980.

 

[bmaverick]

Thank you sir, I was able to find a manual that turned out to be adequate and in english
I bought a digital copy from a gentleman on ebay https://www.ebay.com/itm/305702999405
My cross over connection point was when I was able to identify that they were selling an injector pump on amazon that would fit both the JD 750 and my yanmar 1601D. The truth is, yanmar was building (motor, injector pump, etc) for John Deer at the same time or right after they were building for the Yanmar name in the years around 1980.

Yes, just like this,

Here the JD850 and YM2500 are made with the same parts, same engines at the same time. One green, one red.

 

[bmaverick]

Thank you sir, I was able to find a manual that turned out to be adequate and in english
I bought a digital copy from a gentleman on ebay https://www.ebay.com/itm/305702999405
My cross over connection point was when I was able to identify that they were selling an injector pump on amazon that would fit both the JD 750 and my yanmar 1601D. The truth is, yanmar was building (motor, injector pump, etc) for John Deer at the same time or right after they were building for the Yanmar name in the years around 1980.

The YTOG has the manual for free in PDF. Most of the time, these eBay sellers come to our site, download the manuals and then sell them. We give them away for free. No ads on the site, it's a support group for Yanmar made machines. We are going on 40+ years now.

 

[Murray_YM1601D]

The YTOG has the manual for free in PDF. Most of the time, these eBay sellers come to our site, download the manuals and then sell them. We give them away for free. No ads on the site, it's a support group for Yanmar made machines. We are going on 40+ years now.

Thank you for the information.... I looked at the site but don't see any manuals.... Did you say there is a place to find a Yanmar 1601D manual or a John Deere 750 manual?

I am also going to post a link to the video my son and I made for our tractor and the stuck throttle remedy we found....

 

[Murray_YM1601D]

Thank you sir, I was able to find a manual that turned out to be adequate and in english
I bought a digital copy from a gentleman on ebay https://www.ebay.com/itm/305702999405
My cross over connection point was when I was able to identify that they were selling an injector pump on amazon that would fit both the JD 750 and my yanmar 1601D. The truth is, yanmar was building (motor, injector pump, etc) for John Deer at the same time or right after they were building for the Yanmar name in the years around 1980.

I will post this video that my son and I made so that other folks may find it useful in fixing a throttle sticking issue.

 

[bmaverick]

Thank you for the information.... I looked at the site but don't see any manuals.... Did you say there is a place to find a Yanmar 1601D manual or a John Deere 750 manual?

I am also going to post a link to the video my son and I made for our tractor and the stuck throttle remedy we found....

To see the manuals on the YTOG,
1. you must be a member. membership is free, just like this site.
2. you must login to get to the section of the manuals.

We've have well over 28,000 downloads of the manuals since 2019.