Delta Kits B-300 Injector Seal Replacement

[candyman]

Brent or any of you ! I know we are suppose to replace the white seal on the B300 Delta Kits Bridge injector after 10 repairs. My question is this. I replaced the seal on Wednesday, and by Friday I had performed 10 repairs with that bridge. The seal still looks good and has only been in the injector 3 days. Is it just a rule of thumb, that we replace it after 10 repairs or can we stretch it out a few more repairs, when the replacement time is so short?

[screenman]

I have made mine last longer, I do feel that we lose a bit of pressure and that the seal is less reliable the longer I leave it. For the very few cents per repair I feel it makes sense to change it.

[Kgobin]

How often do you change out your end seal? We talk with technicians that are trying to get 40-50 repairs out of a seal. However, you cannot consistently do great repairs unless you are changing your seals regularly. Delta Kits recommends changing your seals every 10 repairs. An old seal is much more likely to leak than a new one, but that is just one reason to change your seal regularly. After about 10 repairs, the walls of the seal begin to break down. This allows some resin to blow past the piston and up into the injector while you are applying pressure to the repair. When this happens, even though the seal is not visibly leaking, your pressure and vacuum cycles will be less effective.

[kennycrane]

why do we have writing on the one end of the seal? it seems that we should be able to turn the seal over and use the other side. just a thought?

[candyman]

Thanks guys for the information: Korey, will that also cause the plunger to seat all the way in, instead of stopping?
I just learned I am a Grand Pop. 4:13pm west coast, 7 lbs 4 oz, 19 inches long: Taylor Renee, San Diego: Beautiful and healthy. My son is in the middle east on military assignment. If any of you are in the San Diego area the week of Aug 27 - 3 Sept contact me. I would like to meet other WSR Tech that may have more experience. I will be staying in the Chula Vista area, and a place called Spring Valley, Claifornia.

Candyman:
NWRA Certified
Delta Kits, Trained & Certified

[Roo]

Well, I am going to have to agree changing the seal at around 10 repairs. I have tried to stretch it further and the resin usually starts leaking out around the seal about that time or you end up with a little air bubble that will just not come out of the repair.

Here's a tip I just started doing a few months ago to keep track of repairs made per injector. I take the curing tab and store it between the foam and the tray by the injector cut out. When I get 10 curing tabs stacked in the spot, I change the seal...simple and effective and keeps the guesswork out of how long you have been using the seal.

[Brent Deines]

why do we have writing on the one end of the seal? it seems that we should be able to turn the seal over and use the other side. just a thought?

The writing on one end of the seal is to let you know that is the side that goes into the injector. Both ends are not the same, but the differences are subtle enough that many technicians many not notice the difference without the writing, which by the way, says this side in.

One one end the hole is flared out slightly to make the injector slide in easier, while the other end tapers in slightly to create a bit more pressure just as the resin enters the break, and to help prevent leaking. If you look carefully at the end of the seal you will notice that the hole on the writing end is slightly larger than the hole on the opposite end.

It's not typically the end of the seal that wears out, so there would be no benefit to switching ends, even if they were exactly the same.

[Brent Deines]

Thanks guys for the information: Korey, will that also cause the plunger to seat all the way in, instead of stopping?
I just learned I am a Grand Pop. 4:13pm west coast, 7 lbs 4 oz, 19 inches long: Taylor Renee, San Diego: Beautiful and healthy. My son is in the middle east on military assignment. If any of you are in the San Diego area the week of Aug 27 - 3 Sept contact me. I would like to meet other WSR Tech that may have more experience. I will be staying in the Chula Vista area, and a place called Spring Valley, Claifornia.

Candyman:
NWRA Certified
Delta Kits, Trained & Certified

Congratulations DB!

[Mr Bill]

Well, I am going to have to agree changing the seal at around 10 repairs. I have tried to stretch it further and the resin usually starts leaking out around the seal about that time or you end up with a little air bubble that will just not come out of the repair.

Here's a tip I just started doing a few months ago to keep track of repairs made per injector. I take the curing tab and store it between the foam and the tray by the injector cut out. When I get 10 curing tabs stacked in the spot, I change the seal...simple and effective and keeps the guesswork out of how long you have been using the seal.

Thats a good idea!

[screenman]

Candyman, congratulations on the exciting news, good thing about grand kids is you can give them back when you have had enough, unlike your own kids.