Difficulty with I-100 injector

[StellarChip]

It seems quite difficult to pull back on the plunger without applying excessive pressure on the bridge. Sometimes when I pull back it breaks the seal allowing air into the injector. Is this normal?? I'm hesitant to apply to much pressure against the bridge for fear of spreading the break. Thanks in advance for the help.

[Brent Deines]

Use two hands, one on the cylinder, and one on the plunger when pulling up on the piston. With a little practice the cylinder should not lift at all.

Hold the injector like a syringe when applying pressure, with two fingers under the cylinder knob and your thumb on the plunger knob. This way you are not putting any extra pressure against the glass.

I know that the amount of pressure it takes to press the plunger into the seal sometimes makes new users feel a bit uncomfortable, but it is that hydraulic pressure and the tight fit of the seal that make the injector so effective.

It is also possible that you are getting a resin build up inside your injector that is not allowing the spring to function properly. Recently a couple of injectors were returned to us because the customer had failed to clean them properly after each repair and they had been storing the plunder with the spring compressed. We were able to get the injectors working again, but because of the resin build up inside the injector the spring travel was compromised, making it much more difficult to pull the plunger back far enough to lock it into the vacuum position.

Although unlikely, it is also possible that the injector is defective. Every injector is inspected before it is packaged for shipment, but if you rule out everything above we would be more than happy to take a look at your injector to make sure that everything is functioning properly.

Please feel free to give us a call if you want to take advantage of this free service.

[screenman]

Stellarchip, can I ask did you have training in the use of this equipment. At first I found it a bit unusual compared with the plastic injectors I had used for the previous 15 years but with a little perseverence and practising on a practise screen I mastered it, now I would certainly not go back.

[t4k]

Use two hands, one on the cylinder, and one on the plunger when pulling up on the piston. With a little practice the cylinder should not lift at all.

Hold the injector like a syringe when applying pressure, with two fingers under the cylinder knob and your thumb on the plunger knob. This way you are not putting any extra pressure against the glass.

I know that the amount of pressure it takes to press the plunger into the seal sometimes makes new users feel a bit uncomfortable, but it is that hydraulic pressure and the tight fit of the seal that make the injector so effective.

It is also possible that you are getting a resin build up inside your injector that is not allowing the spring to function properly. Recently a couple of injectors were returned to us because the customer had failed to clean them properly after each repair and they had been storing the plunder with the spring compressed. We were able to get the injectors working again, but because of the resin build up inside the injector the spring travel was compromised, making it much more difficult to pull the plunger back far enough to lock it into the vacuum position.

Although unlikely, it is also possible that the injector is defective. Every injector is inspected before it is packaged for shipment, but if you rule out everything above we would be more than happy to take a look at your injector to make sure that everything is functioning properly.

Please feel free to give us a call if you want to take advantage of this free service.

What is the proper procedure to clean the injector?

[Brent Deines]

The Delta Kits I-100 injector should be cleaned thoroughly with denatured alcohol after every repair. We now supply a cleaning jar with every windshield repair system and every stand along injector we sell, so you can simply put a couple of ounces of denatured alcohol in the jar, drop the injector parts in the jar, shake to make sure the alcohol covers and rinses through the parts, then remove and allow to dry. Compressed air can be used to speed up the drying process.

Compressed air may also be used to blow out the injector parts between windshield repairs if you are doing them back to back, but if it will be more than a few minutes between repairs you should always use the alcohol, and alcohol should always be used at the end of the day.

It is also important to store the injector in a vertical position with parts separated, and spring in the relaxed position, and to avoid turning the injector upside down with resin in it.

Fresh alcohol should be used each day.

If you did not receive a cleaning jar at the time you purchased your Delta Kits injector they can be purchased separately for a very minimal price. Denatured alcohol can be purchased at most hardware and paint stores.

[jayjacque]

Resin build-up. I didn't know any better when I first got mine, and after cleaning I would leave the plunger in the compressed position. When it got stuck a couple of times and I had to use something to forcefull pry it apart, I finally figured it out.

[Guelster]

I carry a little can of compressed air and hit it with the canned air after every repair. Be careful though...wear eye protection when doing so! A few times I had the injector cupped in my hand & when I hit it with the air, some resin squirted right back at me. I also carry a little glass jar filled with Denatured alcohol and soak it in the down time. I do take out my end seals when soaking it. I thought I read somewhere on here where it said you can leave them in but I take them out.

[harrellbenjamin]

I use a spray bottle of denatured alcohol .I use it for a quick clean on the windshield and a quick spray of my injector before I put it up.

[freightshaker]

Would denatured alchohol be good to clean LR's RQT injector? They recommend the cleaner in a can that they send with their kit, but alchohol would be cheaper (of course). What do you LR fellas use?

I'm not tryin' to hi-jack a thread about Delta's injector (I wish I owned one). I just figured it would be better to ask here than start a new thread.