In need of an oil pump shaft - Chevelle Tech
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post #1 of 29 (permalink) Old Nov 22nd, 19, 12:58 PM Thread Starter
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Josh
 
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In need of an oil pump shaft

I have an older Melling pump that has uses a hex shaft instead of the standard slotted. It has a pickup on it that is sort of specific to my pan as well. I was sending a set of pistons to Line2Line to be coated and decided to get the pump gears coated as well and put it back in service. Well I got it back together,went to spin it with the shaft and noticed a lot of play. Looked inside the shaft and noticed there was a good amount of wear, didn't inspect it upon teardown. Apparently they only used them for a while and then went back to the standard, Melling said they haven't had any on the shelf for years. I was hoping one of you guys had one in good shape lying around that I could purchase before going to a whole new pump and pickup. Thank you very much

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Big Shot Plate
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12 bolt
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post #2 of 29 (permalink) Old Nov 22nd, 19, 1:51 PM
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Re: In need of an oil pump shaft

It is not worth it to reuse an older pump like that, cost wise I would just get a new pump. just my 2 cents.

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post #3 of 29 (permalink) Old Nov 22nd, 19, 2:18 PM Thread Starter
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Josh
 
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Re: In need of an oil pump shaft

Quote:
Originally Posted by Jebchevelle View Post
It is not worth it to reuse an older pump like that, cost wise I would just get a new pump. just my 2 cents.
I understand where you're coming from Jeb. The reasons I want to use it is, it's not the standard M77 pump, it's the select anti-cavitaition version that is good shape, especially now with the coated gears that I have invested in. Plus I have a very unique pickup that fits my custom pan that is one with the pump. I have a local CNC guy that said he can make one but I'm just hoping by chance someone has one lying around first.

1970 ElCamino
440ci "Baby" BBC
Big Shot Plate
TH400 w/Brake
12 bolt
Best#'s- 1.35-5.94-120-9.59-141
Getting it done with 10"
2015 Pinks All Out 8-9sec Winner
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post #4 of 29 (permalink) Old Nov 22nd, 19, 6:02 PM
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Re: In need of an oil pump shaft

If you can't find one maybe replace the drive gear with a slotted one and use the regular drive. Everything else will still work with your pan. Could have one made but at what cost?
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post #5 of 29 (permalink) Old Nov 22nd, 19, 8:39 PM
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Mr Bill
 
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Re: In need of an oil pump shaft

Josh,
Did Melling give you a part number for the shaft ? You would be amazed at how much old/discontinued stuff I have found on E-bay. I have some old Melling catalogs at the shop and could probably find the number for you Monday if you want.
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post #6 of 29 (permalink) Old Nov 22nd, 19, 9:36 PM Thread Starter
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Josh
 
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Re: In need of an oil pump shaft

Quote:
Originally Posted by sleeper View Post
If you can't find one maybe replace the drive gear with a slotted one and use the regular drive. Everything else will still work with your pan. Could have one made but at what cost?
I mentioned that to Melling and they strongly advised against it because of the risk of losing the press fit. I'm thinking it would be ok, but also think it would be always be in the back of my mind.. I'm not sure of the cost on a new one yet, he said he needs to see it in person first and I haven't had a chance yet.

1970 ElCamino
440ci "Baby" BBC
Big Shot Plate
TH400 w/Brake
12 bolt
Best#'s- 1.35-5.94-120-9.59-141
Getting it done with 10"
2015 Pinks All Out 8-9sec Winner
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post #7 of 29 (permalink) Old Nov 22nd, 19, 9:40 PM Thread Starter
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Josh
 
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Re: In need of an oil pump shaft

Quote:
Originally Posted by BillK View Post
Josh,
Did Melling give you a part number for the shaft ? You would be amazed at how much old/discontinued stuff I have found on E-bay. I have some old Melling catalogs at the shop and could probably find the number for you Monday if you want.
I had a Melling dealer make some calls this week and no luck on part number, but if you have the time to look into Bill I would certainly appreciate it.

1970 ElCamino
440ci "Baby" BBC
Big Shot Plate
TH400 w/Brake
12 bolt
Best#'s- 1.35-5.94-120-9.59-141
Getting it done with 10"
2015 Pinks All Out 8-9sec Winner
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post #8 of 29 (permalink) Old Nov 23rd, 19, 12:35 AM
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Re: In need of an oil pump shaft

the shaft is press fit?

Asking as I have a melling with 60 mi and the shaft leans to one side when the dist is pulled always has. ????
It was from that era of funky castings....dont mean to hijack

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post #9 of 29 (permalink) Old Nov 23rd, 19, 10:23 AM Thread Starter
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Josh
 
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Re: In need of an oil pump shaft

Quote:
Originally Posted by cuisinartvette View Post
the shaft is press fit?

Asking as I have a melling with 60 mi and the shaft leans to one side when the dist is pulled always has. ????
It was from that era of funky castings....dont mean to hijack
Yes the main shaft is pressed into the one gear. I'm sure what you are seeing is the driveshaft leaning because of the slotted style which is nice bug deal. The distributor gear centers it up.

1970 ElCamino
440ci "Baby" BBC
Big Shot Plate
TH400 w/Brake
12 bolt
Best#'s- 1.35-5.94-120-9.59-141
Getting it done with 10"
2015 Pinks All Out 8-9sec Winner
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post #10 of 29 (permalink) Old Nov 24th, 19, 9:03 PM
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Re: In need of an oil pump shaft

Hope you find what your looking for.
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69 VW baja 1679cc. stick shift toy.
96 chevy 1500, tow vehicle.
03 yz85 fun bike.
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post #11 of 29 (permalink) Old Nov 25th, 19, 9:49 AM
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Mr Bill
 
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Re: In need of an oil pump shaft

Josh,
It looks like it is probably a 10778C pump. Can you measure the shaft length ? What size is the hex ? Maybe 3/8" ? The catalog I have has a list of shafts with lengths and hex sizes etc. Picture would be nice also.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md


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post #12 of 29 (permalink) Old Nov 25th, 19, 11:42 AM Thread Starter
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Josh
 
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Re: In need of an oil pump shaft

Quote:
Originally Posted by BillK View Post
Josh,
It looks like it is probably a 10778C pump. Can you measure the shaft length ? What size is the hex ? Maybe 3/8" ? The catalog I have has a list of shafts with lengths and hex sizes etc. Picture would be nice also.
Yeah that's it Bill. I dont have the shaft with me but can get a pic of it later. I know the hex on the pump is .340 so an 11/32" broach is used to make the shaft.

1970 ElCamino
440ci "Baby" BBC
Big Shot Plate
TH400 w/Brake
12 bolt
Best#'s- 1.35-5.94-120-9.59-141
Getting it done with 10"
2015 Pinks All Out 8-9sec Winner
Qwiktripz1320 is offline  
post #13 of 29 (permalink) Old Nov 26th, 19, 6:34 PM
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Re: In need of an oil pump shaft

is the pump shaft male or female?

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post #14 of 29 (permalink) Old Nov 26th, 19, 8:30 PM Thread Starter
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Josh
 
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Re: In need of an oil pump shaft

Quote:
Originally Posted by Tom Mobley View Post
is the pump shaft male or female?
Male

1970 ElCamino
440ci "Baby" BBC
Big Shot Plate
TH400 w/Brake
12 bolt
Best#'s- 1.35-5.94-120-9.59-141
Getting it done with 10"
2015 Pinks All Out 8-9sec Winner
Qwiktripz1320 is offline  
post #15 of 29 (permalink) Old Nov 26th, 19, 8:47 PM
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Re: In need of an oil pump shaft

I suggest you dial up this place and have a conversation with Vern the owner. He'll probably answer the phone. Get a new pump built by him to your exact needs.

Schumann Oil Pumps | High Performance Oil Pumps

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