alk1174
Well-known member
- Joined
- May 22, 2020
- Member Number
- 1207
- Messages
- 124
Cliffs What is the typical minimum thread engagement you get on the 1/4" npt fitting when tapping into the "vein" on the top of an ifs box?
Long story
I am in the process of putting a TG hydro assist kit on my truck using an early style IFS box. I heard all of the horror stories about doing it but they were all related to the disassembly and reassembly of the box. I did some searching and found the post below on the OFN that explains a simple way to do it and that part has been easy. Now on to the fun. I tapped the hole into the side of the box and that went well. I am able to get about 3 turns on the fitting before it gets finger tight and another turn or so with the wrench. It did chowder up the tap a bit. On to the hole in the vein on the top of the box. Drilling was no problem and unless you are ham fisting it and not using your brain it would be pretty hard to drill through the vein. Tapping has been another story. With the chowdered up tap I was only able get deep enough to get about a turn and a half finger tight. Got a new tap and was able to get to the bottom of the hole before I had to grind off some of the tapered end of the tap to go deeper. Got to where I could get about 2 turn finger tight and another turn with a wrench. I felt like 3 full turns was not enough so I tried to get a little more depth and the tap snapped. Starting all over again and I figured I would ask for some input to see what others are getting to find out if this is common or I am the idiot here.
In looking at the chart linked below I should get almost a 1/4" of thread depth engagement finger tight and just over 3/8" wrench tight if I am reading it correctly. I feel like I am close to that now on the second attempt just don't want to push it much more and snap another tap.
FYI I am using a Hanson made in the USA tap from lowes that I flattened the bottom on to turn it into a bottoming tap. Took care not to burn it up and ruin the temper.
The original one didn't break easily I put quite a bit of force on it.
More useful info.
The seal kit part number for the early style box it 8846.
Long story
I am in the process of putting a TG hydro assist kit on my truck using an early style IFS box. I heard all of the horror stories about doing it but they were all related to the disassembly and reassembly of the box. I did some searching and found the post below on the OFN that explains a simple way to do it and that part has been easy. Now on to the fun. I tapped the hole into the side of the box and that went well. I am able to get about 3 turns on the fitting before it gets finger tight and another turn or so with the wrench. It did chowder up the tap a bit. On to the hole in the vein on the top of the box. Drilling was no problem and unless you are ham fisting it and not using your brain it would be pretty hard to drill through the vein. Tapping has been another story. With the chowdered up tap I was only able get deep enough to get about a turn and a half finger tight. Got a new tap and was able to get to the bottom of the hole before I had to grind off some of the tapered end of the tap to go deeper. Got to where I could get about 2 turn finger tight and another turn with a wrench. I felt like 3 full turns was not enough so I tried to get a little more depth and the tap snapped. Starting all over again and I figured I would ask for some input to see what others are getting to find out if this is common or I am the idiot here.
In looking at the chart linked below I should get almost a 1/4" of thread depth engagement finger tight and just over 3/8" wrench tight if I am reading it correctly. I feel like I am close to that now on the second attempt just don't want to push it much more and snap another tap.
FYI I am using a Hanson made in the USA tap from lowes that I flattened the bottom on to turn it into a bottoming tap. Took care not to burn it up and ruin the temper.
The original one didn't break easily I put quite a bit of force on it.
More useful info.
The seal kit part number for the early style box it 8846.
Guide to drill and tap a Toy Ifs box for hydro assist. - OFN Forums
Guide to drill and tap a Toy Ifs box for hydro assist. Offroad Fabrication
www.offroadfabnet.com
Basic Dimensions, American National Standard Taper Pipe Threads, NPT, (ANSI B2.1-1968)
Your ultimate source of Hose Fittings, Spray Gun Connectors and various attachments. Hose Fittings, Spray Gun Connectors, Adapters and reducers are all part of our parts inventory.
www.ultimatewasher.com
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