SQ Hans

 This week my group and I finished our measurements and put the 3176 cat engine we were working on back together. Throughout this project we found several measurements that were out of spec. Some of the things that I had learned on this project were measuring the crank journals for the connecting rods, measuring connecting rods for out of round, and how to set the Jake brake adjustment.

 

 

 

   

 

  

  

SQ Hans

This week I learned about testing different sensors. One of them was a temp sensor, on this sensor I hooked the leads from my meter to each end of the sensor and tested the resistance through the sensor. Then I was able to use hot and cold air to make the sensor function and watch the resistance go up and down.

I also learned about three wire pressure sensors. These sensors have one ground wire a signal wire and a voltage reference wire. When pressure is applied to these sensors a plate inside the sensor moves to make contact and send out a signal voltage that is equal to or less than the voltage reference. The amount of voltage sent out is determined by the pressure put on the sensor and then that voltage reading is displayed on a gauge as a pressure reading.

SQ Hans

 This week I was doing a starting testing on an international truck that wouldn't crank over. I didn't have to get any parts for this truck because as I found out the spot where you test or dont test can mean the difference between new parts or just tightening a loose nut.

 

You can see the black spot on the post on the solenoid where there was a loose connection. This is where the point that you test makes a difference because on the solenoid post I got 12v and at the bar that goes between the post and the starter I got 0v

 

 

This was what is left from the last start before the truck wouldn't crank. A lock washer that was barely making contact, because of a nut that had loosened up,until the starting current melted it in half. The other half of the washer was welded to the nut. 

 

 

   

 

 I also completed my engine research worksheets

 

 

this week = 60

 

SQ Hans

 This week I was finally able to assemble my Eaton fuller RT-910 transmission. This transmission wasn't to hard to get parts for, but since it is out of a truck from 1966 it did take about a week and a half to get the input shaft and bearing spacer.

 

The input shaft goes in first and then a snap ring followed by the bearing spacer

 

 

to install this input shaft the top cover must be removed and the transmission locked into two gears to stop it from spinning. To install the input shaft bearing you want to hold the main drive gear against the front of the transmission case, I used a piece of wood wedged in to hold the gear from moving. Then the bearing can be installed on the input shaft.

 

 

Bearing installed

 

 

then a nut is threaded onto the input shaft, the nut also has left hand threads and gets torqued to 250 Ft lbs. I used red locktite on the threads and a gland nut wrench to tighten the nut. Then the nut gets penned on two spots onto the input shaft.

 

 

bearing cover installed with new gasket, clutch housing installed with new gasket, cross shafts installed

 

 

 

  

 

 

    

  

 

This week = 66