d180 wont move

[hucksterfool 5]

Thirty is all I have at idle reguarless  of rpm

[pfrederi 17,885]

That is not good...  Even at full throttle only 30?  I hope you can get the charge relief out with out having to pull the pump...That is a major project in itself.

[hucksterfool 5]

Yea. That’s it. I’ll pull the relief valance and check. I don’t use any implements  can I use its spring if it is broke?

[hucksterfool 5]

Looks compressed?

[pfrederi 17,885]

Did eh valve itself come out that spring doesn't look long enough to me maybe some is still inside.  Give a few minutes I have to find one to measure it

[hucksterfool 5]

Yea that’s all of it. 

[pfrederi 17,885]

One of the joys of working on old stuff is that you never know who was in there before and if they did it right.That spring looks to me like an implement relief spring.  To be sure the one you pulled came from the left side of the pump (as you sit on the tractor)  If you can pull the implement relief valve on the right side of the pump directly op posit the one you just pulled.

 

Top spring is what should have been in there  Now over the years some changed from a ball valve to a Cone type (bottom)  Bottom is the implement spring.

 

Are there any small discs inside your cone (bottom of pic.

[hucksterfool 5]

So the thicker spring is the implement one and the longer is the relief. I tried swapping g springs side to side and now have 60 at idle but drops up one rpms

[hucksterfool 5]

Also originally when I tried the capped off implement control I got 150 psi on gauge

 

seems to be something with the relief valve side. 

[pfrederi 17,885]

7 minutes ago, hucksterfool said:

So the thicker spring is the implement one and the longer is the relief. I tried swapping g springs side to side and now have 60 at idle but drops up one rpms

 

 

The pressure goes down as you speed up the engine???  That is counter intuitive.

[hucksterfool 5]

Yep pressure drops when you give it gas

 

like the relief valve is activating when more pressure is built. 

 

Super per frustrating as I did nothing. Was working fine  now won’t move. Just growls like it wants to.   Maybe I’ll buy a pump. Just hate throwing parts at it. 

[pfrederi 17,885]

I certainly understand your frustration. Is you charge pump spring (the thinner one) 1" long and did it have a ball or a cone?

[hucksterfool 5]

Yea thinner one 1 inch and thick 3/4  I’ll check the valve to see if ball or cone

[hucksterfool 5]

It’s a ball

[pfrederi 17,885]

I am stumped at the moment.  I have to wonder why somebody reversed the  springs and valve.  I would have thought that would have created operational problems all along.  The sudden onset and pressure drop at higher RPM I can't explain at the moment.

If you put it back together correctly light spring and ball on the left, heavy one and cone on the right do the pressure test again holding the mid mount lift control all the way up and see what the pressure spikes to...  They used shims to get better implemetn lift pressure.  you don't seem to have any

Edited January 27, 2019 by pfrederi

[hucksterfool 5]

Did that 30psi

 

if I do the same to the implements 150psi

[pfrederi 17,885]

Sorry I am out of ideas the moment

[hucksterfool 5]

Thanks for everyone’s idea and help. 

[953 nut 55,821]

2 hours ago, hucksterfool said:

Yep pressure drops when you give it gas

 

like the relief valve is activating when more pressure is built. 

 

Super per frustrating as I did nothing. Was working fine  now won’t move. Just growls like it wants to.   Maybe I’ll buy a pump. Just hate throwing parts at it. 

Just reading this over, are you absolutely sure the coupling from the engine to the pump isn't slipping? Can you determine the source of the growling sound? 

[hucksterfool 5]

What do you mean by slipping. The growl is coming from the back pump in rear. 

 I’ll upload the growl sound

 

https://app.box.com/s/9bpzdhhrhz14luiuwjh02tlgnbidw7uk

[daveoman1966 3,762]

Just to clarify the components of these two valves in the pump end cap...

The growling noise...  I wonder if the spring in the Acceleration valve(s) of the hyd motor is broken, causing the valves to 'flutter'...just a thought.  The hyd motor is bolted to the left side of trans and the Acceleration valves MAY be accessible without a lot of tear-down.  Here is a pic or two of those valves...in the motor.  

[daveoman1966 3,762]

This is the motion control linkage of an 18 Automatic.  Is the cast iron part cracked where it mounts to the shaft...That would cause the pump to not fully engage.  

[953 nut 55,821]

13 minutes ago, daveoman1966 said:

I wonder if the spring in the Acceleration valve(s) of the hyd motor is broken, causing the valves to 'flutter'...just a thought.

Good thought,       but both would have to have broken at the same time. Not likely.

[hucksterfool 5]

Yea mine is not cracked. It engages fully forward and reverse. Here is a pick of acceleration valve front. The rear one  I would have to remove rear pump 

[hucksterfool 5]

Video of shaft it’s tight

 

https://app.box.com/s/fxds8hsvlwgrdfoo87azzi1ecn3s3yoy