Abs and air line repairs

On the Freightliner the part that makes the clicking noise is the M21 abs modulator.  This part is now obsolete and was replaced by the M30 and that was replaced by the M32.  It works by sensing when the tire is going to skid the sylinoid closes the intake and opens the exaust preventing the tire from skidding.  It then reopens the intake and closes the exaust to reaply the brakes.  This system is designed so that even if the abs is not functioning correctly the brakes still work as normal the will just be able to lock up.  This is the url for the bendix site http://www.bendix.com/en/servicessupport/partnumbersearch/partnumbersearch_1.jsp
I also completed the two air line crimping repairs that you wanted us to do in class which are the first two pictures.

repairing damage

On this vehicle some damage happened that prevented the vehicle from starting.  When you would move turn the key the starter wouldn't engage and none of the electronics would turn on.  There was also no resistance when you turned the key.  I had an idea of what it might be so I pulled the dash apart and lo and behold the ignition was in about eight pieces.  (The picture is of the wiring harness that plugs into the ignition that controls the dash.  It was the only thing I could get a clear picture of with the lighting that I had.)  So I got a new ignition and installed it and everything but the fuel gauge worked.  I tracked the wire back from the gauge and found it to be broken and four others to have spots with insulation missing.  I repaired those and everything worked great.  I also learned in class what makes the clicking noises when you turn the key on on a big rig.  It is the abs system.  I will post more about it tomorrow when I turn the assignment in.
40 hours this week
260 hours total

brakes and bearings

This week I learned how to properly adjust wheel bearings.  I also practiced changing and adjusting brakes on the trucks in the shop.  I got my ten practice runs done for the assignment plus a couple extra.  

80 hours

220 hours total

wheel bearing adjustment

This is me testing the play in a wheel bearing with a dial indicator.  I got it to a half a thousanth of an inch of play.

coolant leak

This week I had to track down and fix a coolant leak in a F250.  The leak ended up being in the thermostat housing so I just pulled it apart and resealed it with gasket maker.  I also learned how to properly replace axle seals and bearings.
40 hours this week
150 hours total

adjusting air brakes

This week I learned how to adjust air brakes.  I also learned how to remove and reassemble the brake shoes.  I found that they are much simpler than automotive style drum brakes and are much easier to change at least for me.  I also completed my starting charging system test and count that as a valuable test to take with me into industry.
40 hours this week
110 hours total

battery starting charging test

This week I learned how to do the battery starting charging test.  I have completed three of them so far and plan to do at least seven more.  I have also completed the the air brakes pretest and got a 56%.  I am not surprised by this because I don't know a lot about air brakes and haven't worked with them much but I know by the end of the quarter I will be able to get an easy 100% on the test.
35 hours this week
70 hours total