Leandra's Log

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July 12, 2013

Google doc for pivot instructions

July 08, 2013

NEW File:LifeTrac4 CabLoaderArm.skp

June 25 through July 4th, 2013

Workshop! Projects included the construction of the dozer blade (1), cutting the slots for the spokes of the steel wheels, first with plasma torch then with a 9/16" bit on the mill. Note: when using a plasma torch in the extreme humidity of Missouri summers the water trap must be emptied every 30 min. Mill made a better cut and was actually faster as well. In order to keep the angle from pushing out of the vice we had to hold it down with a 2x4 which was C-clamped to the table of the mill. See photo below. We tried many other ways of securing it, however this jerry-rigged set up ended up best.

(1) IMG 2918.JPG Fabrication 037.JPG

Also made the plate for mounting hydraulics in the cab, for up to four power cubes. This was done out of 1/2" sheet using the punch and die on the first ironworker. Hydcontrolpanel.png


Finished: Fabrication 053.JPG

Then I made and mounted ribs for the dozer blade, custom cut to fit its new dimensions (will update those soon) out of 2x2 angle iron.

Fabrication 109.JPG

Then worked on drilling holes and putting together the boom for the backhoe:

IMG 2919.JPG

I worked on welding the collars into the pivot plates. Then I assisted Cory and Lucas working on the pivot of the backhoe.

June 24, 2013



Loader Arms

NEW File:LoaderArm2.skp

Loader Arm Module Assembly

June 22, 2013

NEW' File:Backhoe stabilizerarms1.skp

Stabilizerarm2.PNG Backhoe quickatt2.PNG

June 19, 2013

Edited Cory's stabilizer arms for the backhoe: File:Backhoe stabilizerarms1.skp


June 18, 2013

  • Worked on converting the parts of the dozer blade that will need to be CNC cut ahead of time, including the pivot plate and mount as well as the ribs and bottom reinforcments, and the new plate for mounting the blade to the pivot:

June 18, 2013 June 18, 2013 June 18, 2013

File:Dblade and ribs.dxf



  • Fixed up the dozer sketchup more: expanded the ribs, made the plates for attaching the hydraulic cylinders more robust.
  • Altered the mount of the dozer blade to contact: took out the vertical 4x4 tubing and now have 2 strips to mount, also shortened the plate that mounts onto the pivot:


June 18, 2013

June 17, 2013

Loader Module

Google Doc for Loader Arm Module Hydraulics

Loader Module Sourcing

Considered using this, could have possible application in the future: https://www.surpluscenter.com/item.asp?item=9-7367&catname=hydraulic 5 Spool combo.jpg

Cab Module

Google Doc of Cab Module Hydraulics

Cab Module Sourcing

June 14, 2013

Bulldozer Blade Module

Google Doc for Dozer Hydraulics

Bulldozer Blade Module Sourcing

June 13, 2013

June 13, 2013 June 13, 2013


Review, Aug 4, 2015

  • It makes it easier if the rotation is on the tractor side, not on the blade side, to keep the complexity and weight towards the tractor.-MJ

June 12, 2013

  • Began work on the modular redesign of the loader arms File:LoaderArm1a.skp. Still needs lots of work, look into sourcing and prices of larger bore hydraulic cylinders.
  • After a discussion with Marcin, revisited the dozer blade to create the design for the actual blade as well as the mounting structure. Led to small alterations with the mount, but not much. Will need to do some minor adjustments and measurements on it tomorrow. File:DozerBlade3.skp

June 12, 2013 June12, 2013 Dozer3front.PNG

June 11, 2013

The hydraulic cylinders are sourced: Angle: https://www.surpluscenter.com/item.asp?item=9-7261-10&catname=hydraulic Tilt: https://www.surpluscenter.com/item.asp?item=9-8262-06&catname=hydraulic

June 11, 2013

June 13, 2013

June 10, 2013

June 10, 2013

  • This design is based off the modular dozer blade found here:

http://www.degelman.com/products/material_handling/dozer_blades/5900/index.php June 10, 2013

  • Hydraulic cylinder for angle:


  • Hydraulic cylinder for tilt:


June 7, 2013

  • Revisited the attachment for the File:DozerBlade1.skp, made a new way of joining the arm to the blade for movement in six directions. Here are screen shots of the preliminary designs:

June 7, 2013 June 7, 2013

  • This is the more complete model. The dark blue pieces represent hydraulic pistons and where they would attach. This is still a sort of rough sketch. Measurements are not exact. However the central plate allows the blade to have tilt, while the pin attached to the plate gives it the forward and back angled motion. This design attaches the dozer blade to the LifeTrac (File:3DLifeTrac.skp):

June 7, 2013 June 7, 2013 June 7, 2013 June 7, 2013

June 6, 2013

Current ideas and designs found online for the Bulldozer 6-way Blade:

  • This one is the most modular design with very compact and simple hydraulics:


  • Detailed description of one style for mounting arms and hydraulic control (4-way):


  • Good Specs on weights, heights, and angles for varying widths of 6-way blades:


  • Having difficulty determining if this joint is feasible or strong enough. Trying to adapt the concept of a large bearing joint for the entire arm of the dozer blade attachment.

Here are some images of the joint:

June 6,2013 June 6, 2013

June 5, 2013

  1. Corrected orientation of PowercubeFile:PTcube2.skp in design. Updated version: File:Microtrac preliminary.skp
  2. Altered Quick Connect Wheels and motors to fit the MicroTrac.
  3. Designed the hub attachment to fit wheel to shaft for both the 20" and 21" donuts at the shop.
  4. Began research on bulldozer blades in order to begin design process.

June 5, 2013 June 5, 2013 June 5, 2013, Hub attachment redesigned for the 21" wheels found in workshop

June 4, 2013

This is the microtrac frame with a powercube File:PTcube2.skp. Sorry its upside down, its just for size reference at this point. Also it has the Quick Connect Wheels and the wheels with tracks File:Micro fulltrack6 4.skp.

June 4, 2013 MicroTrac Design File:Microtrac preliminary.skp

June 3, 2013

June 3, 2013 MicroTrac Frame File:Framewarehouse.skp

This is an updated model of the frame for the microtrac using the warehouse tubing found in the File:Warehouse.skp.