Need some help with trim pumps

[spectra3279]

Anybody ever had one of the prestolite square reservoir pumps apart?

Took mine apart cause it was acting up. Now don't know where the checkballs go.

Pump now runs in both directions. Works fine one direction but not fluid comes out the other direction.

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[DrunkenSailor]

Anybody ever had one of the prestolite square reservoir pumps apart?

Took mine apart cause it was acting up. Now don't know where the checkballs go.

Pump now runs in both directions. Works fine one direction but not fluid comes out the other direction.

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Do you have a model number?

 

[spectra3279]

This is what I got off the bottom of the pump.105921

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[spectra3279]

Do you have a model number?

I should have quoted your post


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[spectra3279]

Do you have a model number?

I should have quoted you

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[DrunkenSailor]

This is what I was able to dig up let me know if this helps.

 

[spectra3279]

I found a wiring diagram let me see what else I can dig up.
View attachment 890170

Thats still all good. I need something for the actual pump. Yea, I took the bottom ate apart and springs and checkballs fell out

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[DrunkenSailor]

Found this too

 

[DrunkenSailor]

@spectra3279

 

[spectra3279]

View attachment 890178
@spectra3279

Found this also. Tried to follow it but mine is different. I have 2 of those needle and seat dojiggers and only 3 checkballs.


Prior to me taking it apart it would go up with no issues. Going down it would act like it was already down. The pump would labor and no movement.

Now just running the pump with nothing hooked to it.

And I just had a thought, the supply coming from the filter, is blocked of depending on the direction. Maybe I need to use an old line and loop it. Im wondering if right now since I don't have anything connected it has no supply to pump. It seems it works in one direction as a push pull but I could be wrong

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[Fun Times]

What stern drive model and year of boat was this pump out of?

 

[spectra3279]

What stern drive model and year of boat was this pump out of?

1979 spectra 32. Trs outdrives. Original 330 trs.

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[Fun Times]

Do you have a service manual for your TRS drive?

I was hoping for the free one to load online for you but it don't seem to be on my end...Maybe your end will load it up for you, http://boatinfo.no/lib/mercruiser/manuals/mercruiser5.html#/0

Haven't checked just yet but that pump might be in here as well, http://boatinfo.no/lib/mercruiser/manuals/mercruiser4.html#/0..., http://boatinfo.no/lib/mercruiser/manuals/mercruiser4.html#/160

The two following links would cost about $20.00 to download

1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS Workshop Service Repair Manual #5

Download Complete Service Repair Manual for 1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS. This Factory Service Repair Manual offers all the service and repair information about 1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS. The information on this manual covered everything you...

www.servicemanualbit.com

2002 Arctic Cat Snowmobile Service Manual all models

This comprehensive service manual is designed for the 2002 Arctic Cat Snowmobile lineup, covering everything from routine maintenance to engine removal. With a substantial 710 pages, it provides in-depth guidance for professional mechanics and DIY enthusiasts alike. Bearcat W/T Mountain Cat...

www.emanualonline.com

Mercuiser service manual number 5 part number 90-12935 1085 fits your TRS drive which you could buy a book on eBay to if desired, https://www.ebay.com/sch/i.html?_fr...&LH_TitleDesc=0&_osacat=0&_odkw=90-12935+1085

You'll be looking for Section 5 - Power Trim as they have two styles.
A - Oilydne Power
B - Prestolite Low Pressure Power Trimp Pump
C - Prestolite High Pressure Power Trim Pump
D - Trim Cylinders
E - Dual Power Trim Control

 

[spectra3279]

Do you have a service manual for your TRS drive?

I was hoping for the free one to load online for you but it don't seem to be on my end...Maybe your end will load it up for you, http://boatinfo.no/lib/mercruiser/manuals/mercruiser5.html#/0

checking here. jeez its slow though



Haven't checked just yet but that pump might be in here as well, http://boatinfo.no/lib/mercruiser/manuals/mercruiser4.html#/0..., http://boatinfo.no/lib/mercruiser/manuals/mercruiser4.html#/160

checking here also. slow also.


The two following links would cost about $20.00 to download

1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS Workshop Service Repair Manual #5

Download Complete Service Repair Manual for 1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS. This Factory Service Repair Manual offers all the service and repair information about 1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS. The information on this manual covered everything you...

www.servicemanualbit.com

2002 Arctic Cat Snowmobile Service Manual all models

This comprehensive service manual is designed for the 2002 Arctic Cat Snowmobile lineup, covering everything from routine maintenance to engine removal. With a substantial 710 pages, it provides in-depth guidance for professional mechanics and DIY enthusiasts alike. Bearcat W/T Mountain Cat...

www.emanualonline.com

downloaded and nothing about valve body internals.


Mercuiser service manual number 5 part number 90-12935 1085 fits your TRS drive which you could buy a book on eBay to if desired, https://www.ebay.com/sch/i.html?_fr...&LH_TitleDesc=0&_osacat=0&_odkw=90-12935+1085

Same as the above book. nothing on valve body internals.

You'll be looking for Section 5 - Power Trim as they have two styles.
A - Oilydne Power
B - Prestolite Low Pressure Power Trimp Pump
C - Prestolite High Pressure Power Trim Pump
D - Trim Cylinders
E - Dual Power Trim Control

thanks. I have been meaning to get these books anyway.

 

[spectra3279]

Do you have a service manual for your TRS drive?

I was hoping for the free one to load online for you but it don't seem to be on my end...Maybe your end will load it up for you, http://boatinfo.no/lib/mercruiser/manuals/mercruiser5.html#/0

Haven't checked just yet but that pump might be in here as well, http://boatinfo.no/lib/mercruiser/manuals/mercruiser4.html#/0..., http://boatinfo.no/lib/mercruiser/manuals/mercruiser4.html#/160

The two following links would cost about $20.00 to download

1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS Workshop Service Repair Manual #5

Download Complete Service Repair Manual for 1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS. This Factory Service Repair Manual offers all the service and repair information about 1978-1993 Mercury Mercruiser Stern Drive Units TR, TRS. The information on this manual covered everything you...

www.servicemanualbit.com

2002 Arctic Cat Snowmobile Service Manual all models

This comprehensive service manual is designed for the 2002 Arctic Cat Snowmobile lineup, covering everything from routine maintenance to engine removal. With a substantial 710 pages, it provides in-depth guidance for professional mechanics and DIY enthusiasts alike. Bearcat W/T Mountain Cat...

www.emanualonline.com

Mercuiser service manual number 5 part number 90-12935 1085 fits your TRS drive which you could buy a book on eBay to if desired, https://www.ebay.com/sch/i.html?_fr...&LH_TitleDesc=0&_osacat=0&_odkw=90-12935+1085

You'll be looking for Section 5 - Power Trim as they have two styles.
A - Oilydne Power
B - Prestolite Low Pressure Power Trimp Pump
C - Prestolite High Pressure Power Trim Pump
D - Trim Cylinders
E - Dual Power Trim Control

after reading the flow diagram in the first link, the down is a push pull, it pushes fluid from the up lines to the down lines. so right now with no lines hooked up, i have no fluid to pull from.

 

[Fun Times]

after reading the flow diagram in the first link, the down is a push pull, it pushes fluid from the up lines to the down lines. so right now with no lines hooked up, i have no fluid to pull from.

Sounds like the service manuals are helping you out better with this project?
Edit: And you can see the info within the first link which would be service manual number 5? It doesn't load up to where I can see it on my computer is the reason I ask. http://boatinfo.no/lib/mercruiser/manuals/mercruiser5.html#/0

 

[spectra3279]

Sounds like the service manuals are helping you out better with this project?

Yes they are. Tomorrow I'm going to use an old hose and loop the flow back onto itself. Then I'll really know whats up

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[spectra3279]

Sounds like the service manuals are helping you out better with this project?
Edit: And you can see the info within the first link which would be service manual number 5? It doesn't load up to where I can see it on my computer is the reason I ask. http://boatinfo.no/lib/mercruiser/manuals/mercruiser5.html#/0

It does but it takes like 10 minutes

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[Fun Times]

It does but it takes like 10 minutes

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On days and home projects like these then it's worth the wait...Thanks for letting me know as I'm often on that site trying to help others doing the same.

 

[spectra3279]

Thank you, I would have never known about that site

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[Fun Times]

Good luck.

 

[spectra3279]

Good luck.

Thanks

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[spectra3279]

So it was a push pull setup.

Hooked everything back up. It still had the original issue. Everything is new except the valve body. I pulled the distribution block off bottom of out drive. I then removed the new lines that go to the pump. I used old lines and hooked them to the pump and the distribution block.

No issue.

So one of my new lines must be collapsing. Now to figure out which one and replace it

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