Tue Apr 28, 2020 5:43 pm by nikkinutshop
This picture is out of the MT221A IH parts book. The picture shows exactly what I found on all 14, but one, of the IHC pickups I have owned.
There is a two way banjo fitting ( numbers 8-9-10-11) at the master cylinder. One side, of the banjo fitting goes to the back brake line and the other side of the banjo goes to the front tube/line. The left side had a three-way fitting that accommodated the flexible brake hose to the left wheel and the brake line/tube continued on from this fitting to the right side brake flexible hose. Only one "R" pickup had the brake tube go to the front center of the frame and into a double flare brass "T" fitting. This where the brake tube split left and right for the front brakes.
Pascal's law states that the pressure of a gas or liquid exerts force equally in all directions against the walls of its container. The inside of the sealed and connected brake lines and the cylinders are a "container". Knowing this it may not be necessary to center the front "T" fitting, as some persons say.
Many of these trucks used a pressure activated brake light switch at the master-cylinder. I have seen some of the original switches last for many decades. I do not use the pressure switch now. They appear to be made off-shore and every one I tried leaked. I like to use DOT5, silicone brake fluid. Silicone brake fluid will find the slightest imperfection and leak. There are many good mechanical brake switches on the market.
If any person is installing DOT5 or any other brake fluid, is important to not agitate the fluid, by shaking it, before pouring it, carefully, into the brake reservoir. Brake fluids other than silicone will become aeriated and hold the bubble for an hour or more. Silicone brake fluid will retain small bubbles for days and cause the brakes to feel spongy.
DOT5 will not mix with other brake fluids. Not mixing is not a problem. The brake fluid other than the DOT5 will continue to be hygroscopic and add to the inside corrosion problem I ran DOT5 for 20 plus years and 225,000 mile in an "R". Silicone brake fluid need not be flushed and changed every two to three years as the other DOT fluids should. .
When purging the brake lines, be gentle and do not pound the heck out of the brake pedal. It is good practice to put something about 2 inches thick under the pedal, in the cab, to prevent the pedal from going all of the way to the floor and pushing the piston to the end of the master cylinder. This is very much more important on a used system. It is common for the inside of the master cylinder to become corroded where the piston does not normally travel. Pushing the piston seal(cup) over this rough area will destroy it in one pass.
- Attachments
-
- Cole Hersey switch and my adapter bracket
-
- OEM IHC
I would rather have tools I do not need than to need tools I do not have
Artificial intelligence is no match for real stupidity....