Oil pump roulette

[TheOldHokie]

A recent poster reported that the oil pump rebuild kit he just recently purchased here at YT was a TISCO branded kit. I have been having troube getting the TISCO kits so I ordered two - one APN6600A and one APN6600B. They arrived today (fast!!) and low and behold the APN6600A is an Atlantic kit, the APN6600B is a TISCO kit. The TISCO kit (APN6600B) is just fine. The Atlantic kit is not. This time the Atlantic pump gears are oversize by .009/.010 (.571/.572) AND it contains two driver gears and no driven gear :twisted: I could make them work with some re-machining but I am not even going to try. I'll call YT on Monday to see what the heck they can do to correct the problem. These oil pump rebuilds are getting to be a royal PITA....

TOH

 

[L.B,]

Is TISCO made in the land of pack it up and ship it- Ever try the oil pumps made
in the USA.

 

[from the hill]

One thing about YT, they do ship fast. Ordered rear rim bolt kits for the 8n Tuesday night and arrived Friday at noon. Old "Red' now has new rims and tires installed. Also help out the forum sponsor.

 

[TheOldHokie]

(quoted from post at 19:58:16 04/14/18) Is TISCO made in the land of pack it up and ship it- Ever try the oil pumps made
in the USA.

I do not know where the TISCO kits are made. They used to say Made in the USA on the package but that is no longer the case. What I do know is that in the last few months I have purchased a half dozen of them and they have all been dead on specification and worked perfectly.

In that same time frame I have also received a half dozen or more Atlantic kits and every single one of them has been defective. The gears in the latest one are oversize rather than undersize but still defective AND the kit contains the wrong mix of parts.

TOH

 

[DavidBond]

TOH that was me that posted about the Tisco kits at YT. They were 3/4 inch. While the gears were right on the shaft was so rough that I had to chuck in a drill press and polish it out some. When I say rough I mean that not only were the big lathe groves in it, it was also wavy along the shaft. Like they tried to take off to much at once. The original Ford shaft I took out was in better shape even though it had been running crooked in the bore for some time.

 

[TheOldHokie]

(quoted from post at 00:53:53 04/18/18) TOH that was me that posted about the Tisco kits at YT. They were 3/4 inch. While the gears were right on the shaft was so rough that I had to chuck in a drill press and polish it out some. When I say rough I mean that not only were the big lathe groves in it, it was also wavy along the shaft. Like they tried to take off to much at once. The original Ford shaft I took out was in better shape even though it had been running crooked in the bore for some time.

I have three Tisco kits setting on the bench right now and the shafts on them are all fine. When I talked to YT about the Atlantic kit they told me they did not have any Tisco kits with 9/16" gears so they drop shipped one from Sparex. We shall see how that works out. Apparently Tisco is having trouble supplying the 9/16" kits. Took them quite a few weeks to send me the last one they drop shipped for Just 8N's

TOH

 

[TheOldHokie]

I received my replacement oil pump kit from Yt about 30 minutes ago - Sparex APN6600A . It doesn't appear to have been drop shipped and apparently came direct from YT. If anything it is worse that the Atlantic kit I received earlier. They will both be going back to YT in the morning.

The face width on the pump gears in the Sparex kit measure .573 and 582 respectively. Plus the driven gear will not go on the idler shaft. I am going to call Dennis Carpenter and see what they are selling.

TOH

 

[cowdog]

I realize, you buy something you expect it to be correct. That is not unreasonable. Given the situation, can you buy the 3/4 gear set and mill it down to spec. for the 5/8 oil pump? Beings how you have all them machine tools. Or is the dimension in the other plane differant as well? Furthermore, all other things being ok except gear width. Perhaps you could mill down gear housing a few thousands to get the proper clearance between gear face and oil pump side plate? I am just trying to think out of the box for a solution to this ongoing problem.

 

[TheOldHokie]

(quoted from post at 15:11:56 04/20/18) I realize, you buy something you expect it to be correct. That is not unreasonable. Given the situation, can you buy the 3/4 gear set and mill it down to spec. for the 5/8 oil pump? Beings how you have all them machine tools. Or is the dimension in the other plane differant as well? Furthermore, all other things being ok except gear width. Perhaps you could mill down gear housing a few thousands to get the proper clearance between gear face and oil pump side plate? I am just trying to think out of the box for a solution to this ongoing problem.

Taking .010/.020 off the .572/582 face width is easy as is reaming the undersize bore in the driven gear. My inspection didn't go beyond that so I don't know if there are other issues. None of that should be needed and as long as I can get the Tisco kits (or other good ones) it isn't something I am willing to do.

Modifying a perfectly good pump to fit new out of specification gears is not something I would even consider. Push come to shove rebushing the pump and reusing the old gears is definitely a lot cheaper and probably a better solution.

TOH