753 pump?

[Packrat]

Hello Im new to this forum. I have 753 no reverse or jerky on left side Fwd and right side is fine. I switched hoses on pump and got good reverse and jerky or no fwd. I heard good things about a member name Tazza hope someone can help Thanks

 

[RonAus]

Tazza is the biz and so are quite a few other members, one of them will point you in the right direction. As I do not know a fraction of what the other guys know, I will leave it to them. Good luck and welcome to the forum.

 

[OldMachinist]

Tazza is the biz and so are quite a few other members, one of them will point you in the right direction. As I do not know a fraction of what the other guys know, I will leave it to them. Good luck and welcome to the forum.

Check the replenishing valves on the hydrostatic pump for wear, damage or debris. Items 27 and 30 on the diagram.

 

[Packrat]

Check the replenishing valves on the hydrostatic pump for wear, damage or debris. Items 27 and 30 on the diagram.

Can I get to them without removing pump. Where are they?

 

[Tazza]

Can I get to them without removing pump. Where are they?

It does sound like a relief valve issue. They are behind allen headed plugs screwed into the middle pump section, the part where the hoses connect to.
Sadly, i don't know which one you will need to pull out.

 

[Packrat]

It does sound like a relief valve issue. They are behind allen headed plugs screwed into the middle pump section, the part where the hoses connect to.
Sadly, i don't know which one you will need to pull out.

I have heard you are the one who knows on other forums. I see 1 on left side of hoses Will try to figure it out. Not sure where 2nd one is. Manual not that good. Thanks for your imput Tazza. Nice to have guys you can trust to help when you need it. Packrat

 

[Packrat]

I have heard you are the one who knows on other forums. I see 1 on left side of hoses Will try to figure it out. Not sure where 2nd one is. Manual not that good. Thanks for your imput Tazza. Nice to have guys you can trust to help when you need it. Packrat

Taz manual says the ones on top are for reverse. Not clear on where!

 

[Tazza]

Taz manual says the ones on top are for reverse. Not clear on where!

You will probably need to remove the centering plate. Under there, you will see two things that look like plugs with about 6mm or 1/4" allen head holes. These are the relief valves. Un-screw them, they have O rings to seal them against the pump housing.

 

[Tazza]

You will probably need to remove the centering plate. Under there, you will see two things that look like plugs with about 6mm or 1/4" allen head holes. These are the relief valves. Un-screw them, they have O rings to seal them against the pump housing.

I sent you an e-mail, but it seemed to bounce. I sent it from another e-mail address, hopefully it will get there. If not, let me know!

 

[Packrat]

I sent you an e-mail, but it seemed to bounce. I sent it from another e-mail address, hopefully it will get there. If not, let me know!

Taz pump # M91-35916

 

[Tazza]

Taz pump # M91-35916

Sorry, i forgot about the picture. I just accessed my home pc and found pictures of a pump and drive motors that i re-built a few years back. It shows the plugs i mentioned that contain the relief valves.
I really need to sort my pictures out a bit better to make it easier to locate what i want!