LifeTrac II Part Sourcing

Update as of Sep. 7, 2010:

 Extreme Traction from Marcin Jakubowski on Vimeo.

Video of Tractor and Frame assembly in William's second month Dedicated Project Visits report:

   



Download open source tractor 3D source code =Cut List=

Square tube:
 * 4 × 7'8"×4"×4" tubes for base.
 * 3 × 5'×4"×4" under base tubes.
 * 2 × 52"×4"×4" vertical chassis centre tubes.
 * 2 × 55"×4"×4" vertical chassis tubes for front corners.
 * 2 × 59"×4"×4" vertical chassis tubes for rear corners (PC mounting area).
 * 2 × 84"×4"×4" top chassis tubes.
 * 3 × 44"×4"×4" top chassis tubes.

Rounds:
 * [4] 22", 27" or 28" × 1-7/8" axle shafts.
 * [2] 56"×1-7/8" loader shafts.
 * [2] 100"×6"×3" 1/4" or 3/8"? tubes for front loader arms.
 * [2] 86"×6"×3" 1/4" or 3/8"? tubes for rear loader arms.
 * [2] 45"×6"×3" 1/4" or 3/8"? tubes to re-enforce loaders.
 * [8] 6"×4" 3/8" or 1/2" angle-iron to attach re-enforcing tunes to L-arms.
 * [44] 5"bolts+nuts + [88] washers to suit to attach re-enforcing tubes, angle-irons & H/cylinders to L-arms.
 * [4] 4-1/2" 1-7/8" DOM to mount shafts through the frame.
 * [4] 3-1/2" 1-7/8" DOM to mount loader shafts to loader arms.
 * [8] thrust bearings - in the form of large washers with 1-7/8" hole to go between frame-shaft-DOM-mounts and loader arm mounts.
 * [4] 6" bushings/DOM to weld in gussets and wheel mounts.

Plate:


 * [12] 10"×8"×0.5" steel plates to mount flange bearings and hydraulic motors to frame.
 * [4] 6"×8"×1/2" QA-plate to mount motors to QA-motor plate.
 * [2] 12"×12"×1/2" plate to mount H-cylinders to frame base.
 * [4] 12"×4"×1/2" plate to weld to H-cylinder base plates.
 * [16+] 1"diameter-hole nuts to weld into above plates.
 * [1] 1/4" 4or5"×36" plate to mount Valves too.
 * [4] 10"×12"×3/8" plate to connect Rear H-cylinders to loader-arms.
 * [4] 8"×12"×3/8" plate to connect Front H-cylinders to loader-arms.
 * [4] 12×10×1/2" plates to make wheel mounts.
 * [8] 4"×4"×1/2" plate cut diagonally to make [16] gussets.
 * [4] × 32"diameter × 9" wheels.

P.C. & Seat mounting metal:


 * [1] 144" 4×4" 1/4" thick angle Iron
 * [1] 88" 2×2" 1/4" angle iron
 * [1] 192"×4" 3/8" plate

=Other=


 * [16] thrust bearings - in the form of large washers with 1-7/8" hole.

=Bolts=

Functionality list:


 * [40] 3/4x5-1/2", with [40] washers for one side and [40] metal lock nuts for the other side. For wheel plates & cylinder plates.
 * [42] 3/4"x9" bolts, [80] washers, and [40] metal lock nuts. This is for the assembly of the main frame.
 * [16] 1/2"x2" bolts + [16] nylon lock nuts + [16] lock washers to suit. Motor attachment to motor QA/interface plate. These could be 2" studs, as these are welded to the motor QA/interface plate.
 * [8] 3/4"x2" bolts for motor; [8] nuts to weld; [8] lock washers. Attachment of motor interface plate to frame.
 * [32] 5/8"x2"bolts + [32] metal lock nuts, [32] lock washers to suit. Mounting of bearings to frame.
 * [32] 9/16"x2" fine thread bolts, [32] washers, [32] nylon lock nuts. Attachment of wheel to wheel hub. Includes studs, nuts, and washers.
 * [4] 3/4"x4.5" bolts; [8] nuts; [4] nylon lock nuts. Mounting of wheel bushings to wheel shafts.

TOTALS:


 * [40] 3/4"x5.5" bolts
 * [42] 3/4"x9" bolts
 * [4] 3/4"x4.5" bolts
 * [8] 3/4"x2" bolts
 * [120] 3/4" washers
 * [80] 3/4" metal lock nuts
 * [16] 3/4" nuts
 * [4] 3/4" nylon lock nuts
 * [8] 3/4" lock washers


 * [16] 1/2"x2" bolts
 * [16] 1/2" nylon lock nuts
 * [16] 1/2" lock washers


 * [32] 5/8"x2" bolts
 * [32] 5/8" metal lock nuts
 * [32] 5/8" lock washers


 * [32] 9/16"x2" bolts
 * [32] 9/16" washers
 * [32] 9/16" nylon lock nuts

=Hydraulics=

Note that the following list involves 2 loaders. For a simpler version, a single front loader is sufficient. Two loaders are used for extreme flexibility.

(download Blender file here)

Main
Parts from Surplus Center:

Functionality list:

Note: Green indicates finalized shopping list from Surplus Center. Blue indicates list from McMaster Carr. Red is Dalton Hydralics. See Parts Sourcing for contact information.


 * 1) [8] 1-7/8" Flange Bearings -  or 2-1/2" Flange Bearings
 * 2) [2] Front Loader cylinders - 36" - $174 - 48 5/8" retracted length -
 * 3) [4] 3/8 NPTM x 1/2 NPTF 90 SWIVEL  for Front Loader Cylinders up to hose
 * 4) 4.9 square inch area at 2500 PSI implies 12000 lb of force for each cylinder
 * 5) [0] Rear loader cylinders -
 * 6) [0] SAE 8M x 1/2 NPTF 90 SWIVEL  for Rear Loader Cylinders
 * 7) [4] QA plate hydraulic cylinders & 2 Rear Loader
 * 8) [0] 3/8 NPTM x 1/2 NPTF 90 SWIVEL  for Q.A. Plate Cylinders
 * 9) [4] Motors -
 * 10) [8] SAE M 10 to NPT M 1/2" for Ports
 * 11) [4] SAE 4M TO 1/4" NPTM CONNECTOR for Case Drains
 * 12) [8] 1/2" QC for Motors
 * 13) [4] 1/4" QC for motors
 * 14) [2] 1-1/4 SHAFT COUPLER W 5/16" KEYWAY -
 * 15) [2] 1-3/8" 6T fully splined shafting -
 * 16) [2] Female 1-3/8" 6T spline coupling -, $30 each
 * 17) [12] 1.875" double split shaft collars -
 * 18) got 10 double split
 * 19) got 2 single split -
 * 20) [1] 1/2" male QC tip, which already have female part

Valves

 * [1] 3-spool motor valve, 25 gpm -, $288
 * [4] 1/2" Quick Couplers - for motor valve work ports
 * [4] 1/2" NPT M to NPT M 90deg Elbow for Motor Valve working ports - for 2 sets of work ports to wheel motors
 * [4] 3/4" NPT quick couplers - Dalton Hydraulics - 2 for in/out, 2 for auxiliary work ports
 * [2] 1/2 NPT hex nipples -for auxiliary pair of motor valve work ports
 * [2] 3/4 NPT hex nips - in and out of valve
 * [2] 3/4 NPT to 1/2 NPT bushing - auxiliary work ports

OSE Danfoss Black 2 Spool

 * [4] SAE 8M TO 1/2" NPTM CONNECTOR for working ports
 * [6] 1/2" NPT QUICK COUPLER F/F S20-4
 * [1] SAE 10 PLUG for OSE BLACK 2 Spool
 * [2] SAE 10M TO 1/2" NPT CONNECTOR

3 Spool Husco

 * [1] 3/4" NPT quick couplers - Dalton Hydraulics - 1 pair for inlet
 * [1] 3/4" NPT nip - - for inlet
 * [3] 1/2" nip for return cross
 * [1] 1/2"-1/4" bushing - to accept case drain return
 * [2] quick coupler pairs for return line -
 * Pipe cross fitting on the return line to accommodate case drain return -
 * [1] SAE 12 M to NPT 3/4 M Connector
 * [1] SAE 10M TO 1/2" NPT CONNECTOR
 * [1] 1/2 X 1/2 X 1/2 NPTF TEE

2 Spool Prince Valve

 * [1] 3/4" Quick Coupler for outlet (already included in central 3-spool motor valve)
 * [2] 3/4" NPT nip for inlet/outlet -
 * [1] 3/4" NPT tee (already have these) for inlet
 * [2] 3/4" to 1/2" bushings -
 * [1] 1/2" NPT male elbow -
 * [2] 1/2" quick coupler pairs -

Cushion Valves

 * [2] 1/2 NPT 30 GPM 1500-3000 PSI HYD CUSHION VALVES -
 * [4] 1/2" male QC tips to plug into valves, which already have female QCs
 * [2] 1/2 NPTM x 1/2 NPTF swivel for cushion valve to mount tees, for separating to right and left cylinders; only one swivel needed per cushion valve
 * [4] 1/2" nip - - going from between swivel and tee.
 * [4] NPTF Tee - 4 for loaders only, not QA plates

Power Cube

 * Note: pump is already obtained


 * [1] Coupler half, 5/8" - $10
 * [1] Coupler half, 1" - $10
 * [1] Solid spider - $14
 * [1] Breather cap - - $8
 * [1] 3/4 NPT coupling - found at big box hardware stores
 * [1] Suction strainer, 2" to 1-1/4" - - $23
 * Use for dual Power Cubes
 * [1] Use 2" coupler from bix box store to thread into Power Cube frame
 * [1] Pressure relief for power cube bypass-
 * [1] 20 GPM return Line Filter -
 * [1] 3/4" NPT Swivel for return line filter going into frame -
 * [2] 3/4" NPT hex nip on both sides of filter -
 * [1] 1"-3/4" NPT reducer bushing for frame receptacle for return filter -
 * [1] 3/4" quick coupler for return line to filter
 * [2] 1/2" quick couplers for main power lines

Hoses:


 * [1] 2 foot hose from pump outlet to return line filter -
 * [2] 10 foot hoses, already have these -

Pressure Bypass:


 * [1] 1/2" NPT Bypass valve -
 * [3] 1/2" Quick couplers - 1 complete for tee near pump, one going from return filter to tee, and male tip for return line. This gives one extra female quick coupler left over. This set of 3 QCs does not cover hoses going from and to the PowerCube.
 * [4] 1/2" NPTF hex nip for one and other side of tee, on both tees -
 * [2] 1/2" NPTF tee - from outlet of pump to pressure bypass, and from bypass valve into return line filter -

=Hoses=

Between Motor Valves & Motors

 * [4] 1/2" X 36" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE for in/out of the valves
 * [4] 1/2" X 36" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE for in/out of front motors
 * [4] 1/2 X 1/2 X 1/2 NPTF TEE
 * [4] 1/2" X 48" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE for rear motors

Motor Case Drains

 * [2] 1/4" X 72" NPTM 2750 PSI HYD HOSE to run parallel with tractor sides
 * [1] 1/4" X 30" NPTM 2750 PSI HYD HOSE from Tee to Tee in return hose
 * [1] 1/4" X 36" NPTM 2750 PSI HYD HOSE to Rear Motors
 * [3] 1/4 X 1/4 X 1/4 NPTF TEE
 * [3] 1/4 NPT hex nipples
 * [4] 1/4" NPT quick couplers are already with the motors

Front Loader

 * [2] 1/2" X 12" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE from Valves to Cushion
 * [2] 1/2" X 36" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE for left front loader cylinder
 * [1] 1/2" X 48" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE for right front loader cylinder
 * [1] 1/2" X 60" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE for right front loader cylinder

Front loader QA Cylinder Hoses

 * [4] 3/8" NPTM x 1/2" NPTF swivel - - swivels for QA cylinders
 * [2] 1/2" nips - going from cylinder swivels to tees -
 * [2] 1/2" NPTF tees - from cylinder to hoses -
 * [2] male QC tips - for plugging into control valves -
 * [2] 1/2" X 48" NPTM 3000 PSI HYD HOSE
 * [1] 1/2" X 120" NPTM 3000 PSI HYD HOSE
 * [1] 1/2" X 144" NPTM 3000 PSI HYD HOSE

Rear Loader Hoses

 * [2] 1/2" X 12" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE to Cushion Valve
 * [1] 1/2" X 60" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE
 * [1] 1/2" X 96" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE
 * [1] 1/2" X 84" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE
 * [1] 1/2" X 120" 1/2 NPTM X 1/2 NPTM 3000 PSI HYD HOSE

Rear loader Q.A. Cylinder Hoses

 * [4] 3/8" NPTM x 1/2" NPTF swivel - - swivels for QA cylinders
 * [2] 1/2" nips - going from cylinder swivels to tees -
 * [2] 1/2" NPTF tees - from cylinder to hoses -
 * [2] male QC tips - for plugging into control valves -
 * [2] 1/2" X 48" NPTM 3000 PSI HYD HOSE
 * [1] 1/2" X 120" NPTM 3000 PSI HYD HOSE
 * [1] 1/2" X 144" NPTM 3000 PSI HYD HOSE

Seat

 * [1] Tractor Seat

|

=Total Weight=


 * Frame 4x4x1/4" square tubing - 1277 lb
 * Loader arms (2 sets), 3x6x3/8" tubing - 900 lb
 * Loader arm shafts, angles - 150 lb (even)
 * Loader arm cylinder mount plates (base (66lb) and top(80)) - 146 lb
 * Loader arm bottom eyes - 46
 * Hydraulics, wheel bearings - 811 lb
 * Wheel mounting plates, gussets, tubes - 112 lb
 * Bearing and motor plates - 160 lb
 * Wheels - 200 lb
 * Wheel tracks (140 lb chain, 209 lb rebar (2.6 lb/ft for 1" rebar)) - 349 lb
 * Bolts - 75 lb
 * Pins - 30 lb
 * Power Cube (1) - 420 lb
 * Quick Attach Plates (2 sets) - 234 lb

Total weight of tractor with 2 sets of loader arms, 1 small Power Cube, and wheel tracks 4910 lb dry weight, with 2 Power Cubes - 5330 lb. Weight of loader arms with cylinders and Quick Attach plates: 940 front, 900 back, for total of about 1840 lb. Weight of 2 Power Cube version with only front loader - 4430 lb.

=Cost=

Basic Structure


This is about a buck fifty per pound of the 2214 lb machine, or about the going price of tomatoes. That is without the PowerCube. If you use an off-shelf 18 hp engine – the price may be $1225 ($500 for 18 hp engine + $200 pump + $225 frame + $300 balance of system). The total is then $4808.

Front Loader
TOTAL FRONT LOADER COST – $1716
 * Heavy duty front loader arm metal (3/8″x3″x6″ rectangular tube) – $500
 * Cylinders – $600
 * Control valve – $200
 * Hoses – $100
 * Couplers and fittings – $100
 * Quick Attach plate – $150Cushion valve – $66

Rear Loader
TOTAL REAR LOADER COST – $1256
 * Rear Loader Cylinders – $520
 * Heavy duty rear loader arm metal (3/8″x3″x6″ rectangular tube)- $340
 * Selector valve (4) – $180
 * Quick attach plate – $150
 * Cushion valve – $66

Steel Tracks
TOTAL for Wheel Tracks - $518
 * Chain - 80 feet - $270 at $3.37/foot
 * Links - $28
 * Rebar - 140' at $1.57/foot - $220

Quick Attach Plates
(See Open Pario for design)


 * [6]1"x5" pins (30") - $10
 * [129"] 3/16"x3" sq tubing - $46
 * [113"] 1/2"x3" flat - $34
 * [6"] 1" DOM tubing - $15
 * [24"] 1" rebar - $3
 * [66"] 1/4"x2" flat - $6
 * [6"] 1/2" rebar - $1
 * [15"] 3/4" threaded rod - $3
 * [8] 3/4" lock nuts - $1.60
 * [2] 3/4" nuts - $0.40

MATERIALS FOR EACH QA PLATE - $124

Overall cost for a dual loader tractor – wheel base of about 7×7 feet, designed to handle 3 Power Cubes, for a power limit up to approximately 150 hp – $6550 without the PowerCubes. Design is absolutely scalable, such that a half-size version – or MicroTrac, may be made – and it can be designed readily from our Blender model drawings.

Package 1

 * Basic 4 wheel drive tractor - $3583
 * Tracks - $520
 * Front loader with quick attach plate- $1840 (with quick attach plate)
 * Power Cube - $1236 for 18 hp

Total cost is $7179 in materials. The 18 hp may be undersized, so we recommend 2 PowerCubes for 35 hp

Package 2

 * Basic 4 wheel drive tractor - $3583
 * Tracks - $520
 * Front loader with quick attach plate- $1840
 * Quick Attach plate - $124
 * Front loader bucket - $400
 * 2 Power Cubes - $2472 for 35 hp

Total cost is $8815 in materials fpr 35 hp.

Package 3
Now here’s the good part. We aim to develop the induction furnace within 2 years, with which we will be able to produce all tractor structure and components, minus the rubber parts, from scrap steel. This means that we will demonstrate how to build a tractor at the cost of scrap metal plus rubber, plus energy to run the induction furnace. This should be about $1k in materials such as hoses and hydraulic seals, plus labor. This indicates a possibility of closing the industrial divide between the developed and developing worlds.