Tuesday, November 13, 2012

Day 37 Sheet

Name the 9 functions of oil.
  • lubrication
  • extreme pressure wear control
  • cleaning
  • protection
  • cooling
  • sealing
  • shock-damping
  • hydraulic action
  • oil additives

Name 6 oil contaminates.
  • combustion by-products
  • acids, varnish, and sludge
  • abrasives/foreign material
  • fuel or coolant
  • soot
  • environmental

Name 9 sets of data that must be included in oil analysis.
  • Engine modl and serial #
  • Miles and hrs of oil use
  • Miles and hrs on engine since new or since rebuild
  • Oil used (brand name, performance catagory, and viscosity grade)
  • Date sample was collected
  • Engine application
  • Amount of new oil added since previous oil change
  • Any recent engine maintenance
  • Analysis of new unused oil
Briefly describe the 2 methods that can be used to collect oil samples.
  1. Take the sample from a pessurized port while the engine is idling and warm (this method makes sure the oil sample is not stagnant and represents the actual homogeneous oil mixture that is flowing through the engine.)
  2. In case engine is not operational, use a vacuum to draw a sample out of the oil sump (this sample should be obtained asap after stopping the engine so the oil is still warm and strtification has not occured.)
Note to self:
    Stratification- The process of stratifying something, or the state of being stratified.
    Stratify- To form something into a layer(s), or become formed into a layer(s).
    TBN- Total Base # (chemiacl analysis)
    TAN- Total Acid #

Summaize what you have learned from Appendix A doc.


Day 35 Sheet

Verify the problem with the scan tool.
108 Barimetric pressure. FMI #3 FMI Desc: voltage above normal or shorted high. Active: yes (PID).

Day 34 Sheet

What is FCA, and what does it do?
FCA- fuel control actuator is an electronically controlled solenoid valve. The ECM controls the amount of fuel that enters the high-pressure pumping chambers by opening and closing the FCA based on a demanded fuel pressure. When the FCA is opened, the max amount of fuel is being supplied to the fuel injection pump. Any fuel that does not enter the injection pump is directed to the cascade overflow valve. The cascade overflow valve regulates how much excess fuel is used for lubrication of the pump and how much is returned to the fuel tank through the drain manifold. An audible click from the FCA is normal when operating the key from on to the off position.

WARNING:HIGH-PRESSURE FUEL LINES DELIVER DIESEL FUEL UNDER EXTREME PRESSURE FROM THE INJECTION PUMP TO THE FUEL INJECTORS. THIS MAY BE AS HIGH AS 23,200 PSI (1600 BAR). USE EXTREME CAUTION WHEN INSPECTING FOR HIGH-PRESSURE FUEL LEAKS. FUEL UNDER THIS AMOUNT OF PRESSURE CAN PENETRATE SKIN CAUSING PERSONAL INJURY OR DEATH. INSPECT FOR HIGH-PRESSURE FUEL LEAKS WITH A SHEET OF CARDBOARD. WEAR SAFETY GOGGLES AND ADEQUATE PROTECTIVE CLOTHING WHEN SERVICING FUEL SYSTEM.

What is the pessure to be cautios of, in psi?
23,200 psi (1600 Bar)

Regarding the intake manifold air heater element, how many elements are on the truck? How much current is needed to operate the unit?
The air heater elements are used to heat incoming air to the intake manifold. This is done to help engine starting and improve drivability with cool/cold outside temperatures. Electrical supply for 2 air heater elements is controlled by the ECM through the 2 air heater relays. 2 heavy-duty cables connect the2 air heater elements to the 2 air heater relays. Each of these cables will supply approximately 95 amps at 12 volts to an individual heating element within the heater block assembly.

This unit is currenty in "cranks, but no start" condition. What codes are present? Does this relate to the no start?
Po201-Po206 Injectors control circuits fire improperly.
Yes.

With the Modis Scan tool, make the horn blow and wipers operate. What is this type of control called?
Bi-Directional Controls

Day 33 Sheet

Cooling: What is the effect of antifreeze on the sizing of radiators?
  • The ability to transfer heat diminishes when water is mixed with ethylene glycol. The loss in ambient capability due to antifreeze is about 1°C (1.8 °F)  for each 10% glycol, up to 50 %.
Detonation: What is detonation?
  • Premature combustion inside engine: a premature spontaneous burning of a fuel-air mixture inside an internal-combustion engine; uncontrolled burning of the gas in the engine.
Contamination: How, besides the recommended maintenance intervals, could oil change intervals be determined?

  • Fixed method (mileage/hrs)
  • Duty cycle method (operating conditions)
Combustion air flow requirements: "Combustion air flow requirements will vary, depending on the specific engine model and rating. Specific air flow data for CAT engines is given in both volumetric [m to the 3rd power/min (cfm)] and mass [kg/hr (lb/hr)] flow terms, at standard reference conditions.

  And something I learned this week:
Stoichiometry ( stoy-kee-ah-muh-tree)- Refers to the relative quantities of elements in a molecule or the relative amounts of reactions and products in a chemical reaction. Used in regard to the amounts of fuel and air involved in the chemical reaction that is combustion. Stoichiometry combustion takes place when the fuel and air are in the correct proportions so that there is no oxygen or fuel remaining when combustion is finished.

Wednesday, November 7, 2012

Armistice Day

Armistice Day (which overlaps with Remembrance Day) is on 11 November and commemorates the armistice signed between the Allies of World War I and Germany at Compiègne, France, for the cessation of hostilities on the Western Front of World War I, which took effect at eleven o'clock in the morning—the "eleventh hour of the eleventh day of the eleventh month" of 1918. While this official date to mark the end of the war reflects the ceasefire on the Western Front, hostilities continued in other regions, especially across the former Russian Empire and in parts of the old Ottoman Empire.
The date was declared a national holiday in many allied nations, to commemorate those members of the armed forces who were killed during war. An exception is Italy, where the end of the war is commemorated on 4 November, the day of the Armistice of Villa Giusti.
After World War II, the name of the holiday was changed to Veterans Day in the United States and to Remembrance Day in the countries of the British Commonwealth of Nations. Armistice Day remains an official holiday in France and Belgium.
In many parts of the world, people observe two consecutive minutes moment of silence at 11:00 a.m. local time as a sign of respect in the first minute for the roughly 20 million people who died in the war, and in the second minute dedicated to the living left behind, generally understood to be wives, children and families left behind but deeply affected by the conflict. This gesture of respect was suggested by Edward George Honey in a letter to a British newspaper, although Wellesley Tudor Pole had established two ceremonial periods of remembrance based on events in 1917.[1][2]
From the outset, many veterans in many countries have also used silence to pay homage to departed comrades. The toast of "Fallen" or "Absent Comrades" has always been honoured in silence at New Zealand veteran functions, while the news of a member’s death has similarly been observed in silence at meetings.
Similar ceremonies developed in other countries during the inter-war period. In South Africa, for example, the Memorable Order of Tin Hats had by the late 1920s developed a ceremony whereby the toast of "Fallen Comrades" was observed not only in silence but darkness, all except for the "Light of Remembrance", with the ceremony ending with the Order’s anthem "Old Soldiers Never Die". In Australia, meanwhile, the South Australian State Branch of the Returned Sailors & Soldiers' Imperial League of Australia similarly developed during the interwar period a simple ceremony of silence for departed comrades at 9 p.m., presumably to coincide with the traditional 11 a.m. time for Armistice ceremonies taking place in Europe (due to the ten-hour time difference between Eastern Australia and Europe).
In the United Kingdom, beginning in 1939, the two-minute silence was moved to the Sunday nearest to 11 November in order not to interfere with wartime production should 11 November fall on a weekday. After the end of World War II, most Armistice Day events were moved to the nearest Sunday and began to commemorate both World Wars. The change was made in many Commonwealth countries, as well as the United Kingdom, and the new commemoration was named Remembrance Sunday or Remembrance Day. Both Armistice Day and Remembrance Sunday are now commemorated formally in the UK. In recent years Armistice Day has become increasingly recognised, and many people now attend the 11am ceremony at the Cenotaph in London - an event organised by The Western Front Association, a UK charity dedicated to perpetuating the memory of those who served in the First World War.[3]

http://en.wikipedia.org/wiki/Armistice_Day

Thursday, October 11, 2012

A thought to ponder...

Would a really loud boom boom box have any affect on a running engine; i.e. disrupt the functioning components?

Things I've learned this week...

   Let's see, I've learned how to adjust intake/exhaust valves; the proper way to hold a micrometer; what keeps bearing halves in place; the meaning of crush; and the difference between a turbocharger and a supercharger.
  
   The bearing crush (when you torque the case halves together) is what keeps the bearings in place when running.

   Crush- the outward force created by the portion of the bearing that extends above the housing bore when the bearing halves are set into place.

   Turbochargers VS Superchargers-
  • Turbochargers are powered by spent exhaust gases, which are used to spin a paddle-wheel-like part called an impeller. The impeller is connected on a shaft to the turbine, which has vanes on it to compress the incoming air, thereby creating boost, or pressurized induction.A wastegate is built into the system to prevent over-pressurization by venting the exhaust gases away from the impeller. Usually, the turbocharger will be lubricated by pressurized oil-- critically important as the impeller/turbine assembly can spin at speeds in excess of 100,000 RPM.
                                  
                                Basic Turbocharged engine diagram (courtesy of Kellom)


  • A supercharger, in contrast, is driven by an accessory belt-- much like the alternator, air conditioner compressor, and water pump. Internally, there are two (sometimes three) lobes that rotate, sucking in air and force-feeding it to the engine. The supercharger makes a very distinctive noise, which can be music to the ears of performance enthusiasts. (Note: a parasitic draw.) (Info courtesy of www.FordsChevy.com)
Cheers!
  

Thursday, September 27, 2012

Blog Catch Up...

   Day 1 of SPR QTR, I enjoyed listening to how everyone's SUM internships went, though I was surprised to hear that not many students knew about how wide our field spreads. When I was on the waiting list for this program, I was told of the many possibilities (which indeed is huge), which didn't surprise me much; but then again, I'm quite fascinated with how the world works and so ask lots of questions about many things.

   Day 2 I found out the difference between a solenoid and relay; Solenoid- a mechanical connection. Relay-an electrical connection (magnetic switch). 



   Note to Don: this is a very simple diagram, anyone can make this. : p

  • Slots 85 & 86, either could be used as PWR and the other as GRND.
  • Coil to 85/86 gets charged with electrons and magnetizes which pulls arm and so switches connection from 87a to 87.
  • Spike Deppression Device- Resistor allows spike to be consumed; allows spike to go one way and not the other.
  • 12v @ 30 and 87
Note to self- continuity test is used to tell if there is an open circuit or not.

   I haven't taken a pic of the relay tester yet, but will do so shortly and post later; that was rather fun to make, must make one for my tool box. : )

   On to the light boards... Good grief, at first I felt I was behind everyone else because for the life of me I couldn't figure out how to read the schematics. After a full day (and a partial morning) THE light bulb came on and I started understanding and I really got into it. There was a lot of confusion about wire 31 coming from the headlamp switch and wire 33A; whether they were PWR all the time or SWT PWR. Even Jeff was stumped, lol. Thank you Tracy for informing me that, for the most part, I was correct on figuring out which is which (they're both SWT PWR.) That made my day, knowing that I wasn't as far behind as the rest of you as I thought I was.

   My link to "How A DC Motor Works" that helped me understand, well, how it works. Apparently the video that I viewed is currently unavailable... On to another one... http://www.youtube.com/watch?v=RAc1RYilugI I'm sorry if it's long and boring to you.

   More notes to self:
  • No current load, no voltage drop.
  • LED use very low current.
  • 12v across fuse, fuse is blown.
  • With any good fuse, there should be a slight Vd with load.
Cheers!
  

Tuesday, July 10, 2012

News from Stanwood

First day of my intern at Stanwood/Camano Island School District was exciting to me (regardless of how corny it may sound); I learned the proper way of removing/replacing a wheel by myself with the aid of a wheel bar. I removed two sets of driving wheels in less than 10 mins. YAY!!! I was so stoked I had to blab about it to many people. Hee hee hee


Since then, I've repaired many seats by either sewing or patch putty; a few lof's on vans and cars (no buses yet); tranny service on a dodge car; removed a transmission on a bus (that was fun); replaced bearings for timing belts; repaired bus floor using cement glue (very aggravating because the floor didn't want to stay down, and guess why, because my coworker didn't want to follow the instructions; blah); attempted to fix a 1950's Pfaff sewing machine (dumby me, found out later on that the needle was too short *snickers*); and used bus lifts for the first time (that was scary); and all this in the first week.

My second week wasn't very eventful giving that I only worked 2 days and the second day I left early because I was sick. In those 2 days, I reassembled the transmission and came across a problem. When replacing the bolts on the flex plate, one of the heads got sheared off. YIKES!! I had suggested using a tap and die set, in which I got the response of no, we would "walk" the bolt out instead, duh. I had forgotten about that technique.

As for this week, so far I've done (you've probably guessed it) MORE SEAT REPAIRS; timing belts; removed some brakes; and wheel swaps. Ooo ooo ooo.... for the grande finale of the day... wait for it... wait... I GOT TO DRIVE 3 BUSES FOR THE FIRST TIME!!!!!!!!! OMG! What an adrenaline rush! I was scared S@*!less when I was told I was to do that. AAAAHHHHHHH!!! But I did wonderful. No accidents for this lady. Sweet!!

Total hrs to date: 72

CHEERS!

P.S.
  I'll try to remember to keep my phone on me so that I may take pics to post. Sorry.

Friday, May 25, 2012

Alignment on the Freightliner

 

 

 
271 hrs up to date.

Brakes

Late, I know, but my electronics decided to take a vacation...




When first given this assignment, I was ready to dive right in. Until I got the wheel and brakes off then was told to remove the axle, YIKES!!! I've never removed an axle before and truthfully was afraid of unknown pieces falling out. Needless to say, nothing does and my spirits were lifted. Very educating and entertaining.
(Back right wheel of Kenworth. Waiting for other pictures I forgot to take, lost in all the excitment I was.)

Tuesday, March 6, 2012

School: The Final Boundary


School: the final boundary. These are the excursions of the student S.E. Kellom. Her continuing mission: to explore strange new things, to seek out new thoughts and new idealism's, to boldly go where moi has never gone before. Duuu dun dun duuu   dun dun duuu...

Welcome to the 1st Blog of Kellom! Today we learn the ins n outs of how to wk this thingamabobber. Another day, first post on a diesel subject. Yippee!!