SPQ13 Tracy J

Wrapping up this quarter was preventative maintenance.  Jeff did some very helpful PM walkarounds that will help me immensely in the future.  I have come to realize how vitally important the lube guy is, as he is the one that is most familiar with equipment and will be the one to have a developed eye for noticing anything that may be on the road to failure.
I did a PM on the 2005 INTL 4300 with a DT466, an Allison 2200HS tranny, and a Spicer rear axle.

The MSDS for the oil was found on the Shell website by searching Rimula Premium Oil.
Filter LF9025
Rimula Premium Oil MSDS #400843L

There is a tag located driver side underhood that specifies exactly the type of oil that it was filled with at the factory as well as what is required for re-fill.  It should be noted that there are multiple API categories, but only the ones that meet or exceed these requirements should be used.

This is straight out of the service manual that points at every part of the truck that requires scheduled preventative maintenance.  I used this as a tool to help my eyes stay focused on what to look for while inspecting the truck.

I counted 17 zerk fittings throughout the truck.

 However, since the brakes are hydraulic and the tranny is automatic I looked at the Kenworth and located the rest of the fittings, which include the ones pictured here that I noticed would be harder to locate.  Especially while creeping under the truck.

Coolant MSDS # 1194E
































Specifics for Belt Maintenance and Schedule

Air Filter indicator
Fleetguard AF257067
















I think that having a good eye for preventative maintenance requires a lot of experience and patience, and is something that I hope to excel at.  It is one of the most important jobs in the shop, if not the most important and should not be overlooked.  Finding a procedure is the most efficient way to go about it.  I started driver side front and looked over the exterior, sweeping into the hood then the cab, and around the truck and back under the hood.  Same process for under the truck.  Allowed me to take my time and not get distracted by bouncing back and forth like I am so prone to do.

Hours
Week: 30
Total: 335

SPQ13 TRACY

Did some hydraulic tests on the Bobcat E32 this week.  Cycle times for bucket curl and dump are 2.7 and 1.9 respectively.  Timed out to 2.4 and 1.6, contributing any error of that small amount to human error in running the stopwatch.

http://youtu.be/2MIvnn3orU4

Another test done was to locate the travel speed of one track in 60 seconds, then calculate and prove it.  Service manual specced the vehicle speed at 2.6 mph in second gear and high rpm.
Calcs:
  2.9mph x 5280ft=15312/60sec=255.2/14.5(track length in feet)=17.6 revolutions in 60 seconds
Proven - 18.25 revolutions counted (give or take some for human error)
  18.25 x 14.5 = 264.6 x 60 = 15877/5280 = 3 mph

http://youtu.be/BhMuCsSBd5E

Also hooked up an electronic psi gauge  to test the pilot pressure relief valve, located on the pilot line manifold.  Since testing requires the hydraulic fluid in the system to be at or above 150 F, we extended the boom out past relief pressure and it only took a few minutes for the fluid to quickly reach proper temp.  Used an infrared thermometer to verify temperature.  Once done, we jacked the rpms to full.  Test called out to engage the bucket curl and fully curl the bucket, with a target psi of 428 and a range of 406-450psi.  Pressure gauge read high 440's psi with a spike to 453 psi.


This past week I have grown very confident in my ability to read and understand hydraulic schematics, the hydraulic system itself, and a majority of its components.  Now that we are capping the quarter off with preventative maintenance, I was outside looking at the shops new Peterbilt and I was better able to understand and follow even things I've gone over before - like the drop down suspension and the small valve body hidden away under the frame.

Hours: 90
Total: 305