FQ Hans

This week I put some fittings on DOT air lines used on trucks. These fittings use a feral to seal them when the two ends are screwed together

FQ Hans

This week I adjusted a wheel bearing on the kenworth in the shop. I used the TMC procedure to adjust the bearing. The procedure for this is to 1. Tighten the inner nut to 200 ft lbs to seat the bearing. Then 2. Back off the inner nut one full turn. Next 3. Torque the inner nut to 50 ft lbs. Then 4. Back the inner nut off 1/4 turn. Then you can install the washer and the outer nut. Finally you torque down the outer nut. The torque of the outer nut is dependent on whether it is a drive or steer axle, how many threads per inch it has and what type of washer it uses. In this case the finally torque was 300-400 ft lbs. Once that is done you can place a dial indicator from the wheel hub to the axle nut and move the hub back and forth to measure endplay. Endplay should be between. 001-.005 of an inch. If you have a reading of zero, the adjustment needs to be redone because then you don't actually know how much preload is on the bearing.

FQ Hans

This week I was testing on my truck why the turn signals on the right side would blink faster than the turn signals on the left. It was pretty obvious that the relay for the turn signal flashers was going bad. I had also found out that the way the bulb for the turn signals in the tail lights goes in makes a difference. The bulb for the blinker is also a bulb for the tail lights and brake lights. I had put a bulb in the wrong way on one of them so you could see the turn signal light when the tail lights where. So after I saw that was going on I tested to make sure I had proper voltage and the I looked at the bulb and realized the filaments were different sizes. So I switched the bulb around and it worked fine again.

Week = 51 , total = 260

FQ Hans

This week I learned about adjusting wheels bearings using a dial indicator. You want your wheel bearing to have .001-.005 inch of endplay. There is also a procedure that was created by the technical and maintenance council uses to adjust wheel bearings. This procedure makes it very simple to adjust wheel bearings with the correct amount of endplay.

FQ Hans

This week I got to take the head off of a tractor because it was getting water into the oil, water into the cylinders and blowing compression into the cooling system. This was a pretty easy head to take off because all you have to do is take the hood off of the tractor and there is nothing in your way to pull the head off. The rocker arms also come off as one assembly so you just have to loosen the head bolts that hold them on and pull off the rocker arms for all four cylinders as one unit. Now I just have take the head to a machine shop to make sure its not cracked and to make sure its not warped.

FQ Hans

This week I learned about performing starting and charging test with my multimeter. I actually ended up getting a chance to use these test on a 1984 Chevy pickup to figure out why the starter would crank slowly and sometimes start and sometimes not. I knew the battery was brand new so I didn't think that could be the problem. After testing I knew I had good connections and minimal voltage drop and 10 volts while cranking. So I did a voltage drop test on the starter solenoid and had .3v of drop so I knew the solenoid was fine. The only thing left that it could be after that was the starter so I replaced it and the truck now starts almost instantlly after turning the key.

I took the old starter apart to try and figure out what was wrong with it and after looking at all that I could tell was there was a wire inside of it that had some broken strands and corrosion on it.

This week = 55,  total =  107

FQ Hans

This week I learned about finding parasitic battery drains using an amp clamp and multimeter. You can use the amp clamp to measure the amount of current being drawn and then use a multimeter to measure the voltage drop across a fuse in millivolts to find where the draw could be coming from. If there is a voltage drop then you know that there is current flow.

Hours = 52