Directions on removing hydraulic exhaust port

[Blindberg]

Anybody got any instructions on removing the sleeve on hydraulic pump exhaust port? I’m pretty sure it is clogged in housing. I tapped on the sleeve with a socket slightly smaller than the sleeve and a hammer. But I was afraid to hit it to hard and crack the housing…. But it didn’t budge… just hit it harder or is there a trick so not to crack the housing? Also is there a place to buy just the housing incase I crack it?

 

[Hobo,NC]

Anybody got any instructions on removing the sleeve on hydraulic pump exhaust port? I’m pretty sure it is clogged in housing. I tapped on the sleeve with a socket slightly smaller than the sleeve and a hammer. But I was afraid to hit it to hard and crack the housing…. But it didn’t budge… just hit it harder or is there a trick so not to crack the housing? Also is there a place to buy just the housing incase I crack it?

I made a punch for this yes it comes out hard. There was a post on this 7/8 years are so back.

 

[Blindberg]

I made a punch for this yes it comes out hard. There was a post on this 7/8 years are so back.

So, basically you need something slightly smaller than the sleeve, set it on blocks and beat it out? Does it matter if you drive it into the pump or out the front?

 

[soaked]

The light green color manual showes driving bushings rearward.

Driving back in

Exhaust bushing has two exit holes that are to be installed vertically when driving back in ( according to service bulletin on 8N-640-A2)
The INTAKE passage for the pumps left side chamber passes around the exhaust valve bushing.
White wire is intake passage
Black wire is exhaust passage

My thought is that in order to do a good job cleaning, one needs to dissassemble the pump, then drive both intake and exhaust bushings out per the manual.

 

[JMOR]

The light green color manual showes driving bushings rearward.
View attachment 84223
View attachment 84224
Driving back in
View attachment 84225

Exhaust bushing has two exit holes that are to be installed vertically when driving back in ( according to service bulletin on 8N-640-A2)
The INTAKE passage for the pumps left side chamber passes around the exhaust valve bushing.
White wire is intake passage
Black wire is exhaust passage
View attachment 84226
My thought is that in order to do a good job cleaning, one needs to dissassemble the pump, then drive both intake and exhaust bushings out per the manual.

I only see one hole?

https://imgur.com/pt7P13Z

 

[soaked]

.076 drill bit

 

[JMOR]

.076 drill bitView attachment 84235

Got it.. My brain saw "two exit holes that are to be installed vertically" as two holes vertically, as both 'on top'.

 

[soaked]

This is the language in the bulletin

If zoom in, can see the exhaust pressure chamber area encircling the where the bushing lives.

 

[JMOR]

This is the language in the bulletin
View attachment 84238

If zoom in, can see the exhaust pressure chamber area encircling the where the bushing lives. View attachment 84241

nice collection of info. THX for posting.

 

[Blindberg]

thanks! That is very helpful info! I guess I’ll get work driving them out! I wish I had a press, but looks like it can be done with out one. Thanks again!

 

[Hobo,NC]

The light green color manual showes driving bushings rearward.
View attachment 84223
View attachment 84224
Driving back in
View attachment 84225

Exhaust bushing has two exit holes that are to be installed vertically when driving back in ( according to service bulletin on 8N-640-A2)
The INTAKE passage for the pumps left side chamber passes around the exhaust valve bushing.
White wire is intake passage
Black wire is exhaust passage
View attachment 84226
My thought is that in order to do a good job cleaning, one needs to dissassemble the pump, then drive both intake and exhaust bushings out per the manual.

Cool, my punch small end .580 step to .948
View attachment n hydraulic tool.jpg

 

[Hobo,NC]

This is the language in the bulletin
View attachment 84238

If zoom in, can see the exhaust pressure chamber area encircling the where the bushing lives. View attachment 84241

I just noticed it gives the siz of the valve. That being said I have never see them in color.