Case DC oil pump spring

scooter4

Member
Good morning,
can anyone tell me where I can buy a Case DC oil pump spring?
I have looked around, but not found one. Mines is broken up.

I could also make for find one if someone can tell me the specifications.
Please let me know.
Thank you,
Scooter
 
(quoted from post at 09:45:57 06/28/20) Good morning,
can anyone tell me where I can buy a Case DC oil pump spring?
I have looked around, but not found one. Mines is broken up.

I could also make for find one if someone can tell me the specifications.
Please let me know.
Thank you,
Scooter

For NOS, call 410-398-7340 and ask for CASE part #04234AB.
 
Good evening,
410-398-7340 may have some but cant find them right now.
Don only had a used one available and I am not wanting to do that unless no other option. I am worried about it breaking.
So, I have ventured out and purchased spring stock that is the correct od and wire diameter, but I do not know how many coils per inch it is.
I do not know what the original spring rate is so I will have compare them.
I pieced my spring together and it appears that it may be 3" long with 18 coils of course closed ground ends.
.500" OD and.054" wire.
It may be a few weeks before I get this running again, but will let you know what I work out on the spring.

If anyone knows how long a NOS spring is or its other dimensions, please let us know.
Scooter
 
Scooter Don't goof around doing that idea . ,. I f Don has the correct spring ,,
Get It ,.,. It will last , It was built right ,made to last and will work perfectly
.. I feel strongly by trying to make one up,,You will end up with something that
will destroy your engine ,,.
 
Good morning,
I can appreciate the concern, but we need springs and someone has figure it out a source besides handing a spring manufacturer a NOS spring and paying for a 1000 piece run.
When I receive the spring stock I am going to make sure it has the same number of coils per inch, the other specifications are similar. Then, I will compare the spring rates using the longest portion of original spring I have.
I will see how it goes.
Scooter
 
You seem to have a background in that precision business and it seems You know what
you are doing . Pardon Me for fearing You were just pulling random stock from a
shelf and using the paper clip and staple approach. , Godspeed in Your efforts
 
I tend to not know the level of mechanical savvy of the person I am posting to but if you have all the pieces of your old spring and are able to determine its measurements, number of coils, etc., here is the source where I buy the general purpose springs I need.

I find them to be good quality. If you can get close but slightly shorter in length, use a shim(s) which this place also has a large selection of.
Untitled URL Link
 
Good afternoon,
no harm in giving someone good advice not to mess something up.
I have designed springs so that will help. The unkown for me is not having a NOS to copy, but I can get close if the spring stock has similar spring rate.

The link you posted is the source of the spring stock.

If I get one worked out, I will publish the information for others to make one.
Scooter
 
Good evening,
I finished my spring tests and have the following information for anyone who needs a Case DC spring. This produced 30 psi for my system. I just finished shimming main and rods to max .002". I also resurfaced and lapped my relief plunger and seat.

The closes spring material I could find has a lower spring rate so the spring is different length that OEM.

Spring used is McMaster 9663K27. It is 20" long and $7.22 + shipping.

To make one you need a propane or small torch.
1. Use the torch and needle nose pliers to shape one end to be closed and ground flat. start at the end of the wire to begin bending and shaping. Use as little heat as possible. Quench end. Oil or water

2. Measure 3.5" of spring + one more loop needed to close the end and cut to that length.

3. Use torch and shape end to be closed and ground. Quench end. Oil or water

4. Stand spring on ends to make sure it stands up straight so the force on the plunger will be square.

The spring cap is harder to thread up because the spring is longer. Dont worry, the spring cavity and plenty of room left.

Good luck,
Scooter
 

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