hucksterfool 5 #26 Posted January 27, 2019 Thirty is all I have at idle reguarless of rpm Share this post Link to post Share on other sites
pfrederi 17,147 #27 Posted January 27, 2019 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. Share this post Link to post Share on other sites
hucksterfool 5 #28 Posted January 27, 2019 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? Share this post Link to post Share on other sites
hucksterfool 5 #29 Posted January 27, 2019 Looks compressed? Share this post Link to post Share on other sites
pfrederi 17,147 #30 Posted January 27, 2019 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 Share this post Link to post Share on other sites
hucksterfool 5 #31 Posted January 27, 2019 Yea that’s all of it. Share this post Link to post Share on other sites
pfrederi 17,147 #32 Posted January 27, 2019 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. 1 Share this post Link to post Share on other sites
hucksterfool 5 #33 Posted January 27, 2019 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 Share this post Link to post Share on other sites
hucksterfool 5 #34 Posted January 27, 2019 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. Share this post Link to post Share on other sites
pfrederi 17,147 #35 Posted January 27, 2019 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. Share this post Link to post Share on other sites
hucksterfool 5 #36 Posted January 27, 2019 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. Share this post Link to post Share on other sites
pfrederi 17,147 #37 Posted January 27, 2019 I certainly understand your frustration. Is you charge pump spring (the thinner one) 1" long and did it have a ball or a cone? Share this post Link to post Share on other sites
hucksterfool 5 #38 Posted January 27, 2019 Yea thinner one 1 inch and thick 3/4 I’ll check the valve to see if ball or cone Share this post Link to post Share on other sites
hucksterfool 5 #39 Posted January 27, 2019 It’s a ball Share this post Link to post Share on other sites
pfrederi 17,147 #40 Posted January 27, 2019 (edited) 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 Share this post Link to post Share on other sites
hucksterfool 5 #41 Posted January 27, 2019 Did that 30psi if I do the same to the implements 150psi Share this post Link to post Share on other sites
pfrederi 17,147 #42 Posted January 27, 2019 Sorry I am out of ideas the moment Share this post Link to post Share on other sites
hucksterfool 5 #43 Posted January 27, 2019 Thanks for everyone’s idea and help. Share this post Link to post Share on other sites
953 nut 51,720 #44 Posted January 27, 2019 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? Share this post Link to post Share on other sites
hucksterfool 5 #45 Posted January 27, 2019 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 Share this post Link to post Share on other sites
daveoman1966 3,611 #46 Posted January 27, 2019 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. 1 Share this post Link to post Share on other sites
daveoman1966 3,611 #47 Posted January 27, 2019 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. Share this post Link to post Share on other sites
953 nut 51,720 #48 Posted January 27, 2019 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. Share this post Link to post Share on other sites
hucksterfool 5 #49 Posted January 27, 2019 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 Share this post Link to post Share on other sites
hucksterfool 5 #50 Posted January 27, 2019 Video of shaft it’s tight https://app.box.com/s/fxds8hsvlwgrdfoo87azzi1ecn3s3yoy Share this post Link to post Share on other sites
