4x4 Backhoe excavator home made - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
Home Made Tractors, Implements and Accessories For you guys handy with a blow torch, welder or a wrench.. show us what you can do....

Reply
LinkBack Thread Tools Display Modes
post #1 of 36 Old 10-15-2019, 11:31 PM Thread Starter
Senior MTF Member
 
snowblower's Avatar
 
Join Date: Aug 2011
Location: Québec
Posts: 298
Barn
4x4 Backhoe excavator home made

I started in mid September a new 4 x 4 excavator.



Quite simple but powerful enough: 4WD bobcat-style steering



Adjustable stabilizers at the front and leveling blade at the rear that can be used to level, lift the back and anchor the back when working with the backhoe.



Backhoe rotates 200 degrees with hydraulic cylinders and gear, 3500lbs pull force at the bucket



Lifan 2 cylinder engine 688cc 24 hp, hydraulic pump 12.5GPM



27 '' 6-ply tires (industrial machinery tires would have been too steep for the weight of the excavator, which is more important than the weight of a UTV vehicle)



All orders are adjustable in front of the seats (10 spools valves)



Valve to adjust the hydraulic flow without losing the pressure to have the right shoveling speed according to the work and the experience of the operator.



Speed ​​control valve for downhill.



Towing on the road without the need for a trailer.







snowblower is offline  
Sponsored Links
Advertisement
 
post #2 of 36 Old 10-15-2019, 11:33 PM Thread Starter
Senior MTF Member
 
snowblower's Avatar
 
Join Date: Aug 2011
Location: Québec
Posts: 298
Barn
Re: 4x4 Backhoe excavator home made

https://www.brx800.net/

snowblower is offline  
post #3 of 36 Old 10-16-2019, 02:58 AM
20,000 Posts & Climbing
 
Join Date: Jun 2009
Location: Sault Ste Marie, Ontario
Posts: 21,290
Re: 4x4 Backhoe excavator home made

Looking good!!

Bob

Click for The Hydraulics Forum!

Sometimes you get on a roll, sometimes the roll gets on you.

In Service
MF GC2310, Husqvarna YTH20B42T

Down for Repairs
MF1655 w/ FEL, MF1655, MF12H, MF8H, MF7H
Spending too much time on MTF to work on my toys.
TUDOR is online now  
Sponsored Links
Advertisement
 
post #4 of 36 Old 10-16-2019, 07:06 AM
Proud Member of the 1K Club
 
Mark in Portugal's Avatar
 
Join Date: Oct 2008
Location: algarve
Posts: 1,749
Re: 4x4 Backhoe excavator home made

Cool work;
I did something similar to the chain sprocket / cog wheel, but a lot smaller.
Mine is now failing; not enough rigidity and too much load caused slip, slight damage, and now increasing slip.
Your's is much, much stronger; but so is your load.
Attached Thumbnails
Click image for larger version

Name:	hedge cutter gearbox big.jpg
Views:	36
Size:	162.0 KB
ID:	2400797   Click image for larger version

Name:	possitioning sprocket.jpg
Views:	33
Size:	103.7 KB
ID:	2400799  

Mark in Portugal is online now  
post #5 of 36 Old 10-16-2019, 08:19 AM
Senior MTF Member
 
Join Date: Oct 2018
Location: Indiana
Posts: 292
Re: 4x4 Backhoe excavator home made

Nice work, you must have quite a shop for that kind of fabrication.
9297oldram is offline  
post #6 of 36 Old 10-16-2019, 09:32 AM
2000 Posts and climbing!!!
 
Join Date: Oct 2009
Location: ON
Posts: 2,276
Re: 4x4 Backhoe excavator home made

Subscribed! Nice webpage!

Girls with large lawns like a guy with a really big deck!
Hydronerd is offline  
post #7 of 36 Old 10-16-2019, 10:50 PM Thread Starter
Senior MTF Member
 
snowblower's Avatar
 
Join Date: Aug 2011
Location: Québec
Posts: 298
Barn
Re: 4x4 Backhoe excavator home made

Thank you!

I built it for someone who will take it this spring, I will try it before.













snowblower is offline  
post #8 of 36 Old 10-17-2019, 10:18 AM
2000 Posts and climbing!!!
 
Join Date: Oct 2009
Location: ON
Posts: 2,276
Re: 4x4 Backhoe excavator home made

I think the wheel base is long and the tires are too grippy for skid steer like a Bobcat. The early Bobcat's had really short wheelbase; shorter in length than width. Now they have increased the wheelbase for stability, but have 60HP engines to power turning. Since you are using the blade and out-riggers to stabilize while digging, the wheels are just for transport. I would consider moving the wheels much closer together.

Use counterbalance valves for downhill speed control; they are available to mount directly on motor depending on motor make/model.

Will you disconnect motors for towing?

Girls with large lawns like a guy with a really big deck!
Hydronerd is offline  
post #9 of 36 Old 10-17-2019, 03:56 PM Thread Starter
Senior MTF Member
 
snowblower's Avatar
 
Join Date: Aug 2011
Location: Québec
Posts: 298
Barn
Re: 4x4 Backhoe excavator home made

Quote:
Originally Posted by Hydronerd View Post
I think the wheel base is long and the tires are too grippy for skid steer like a Bobcat. The early Bobcat's had really short wheelbase; shorter in length than width. Now they have increased the wheelbase for stability, but have 60HP engines to power turning. Since you are using the blade and out-riggers to stabilize while digging, the wheels are just for transport. I would consider moving the wheels much closer together.

Use counterbalance valves for downhill speed control; they are available to mount directly on motor depending on motor make/model.

Will you disconnect motors for towing?
I am 55 '' wide and 53 '' wheelbase.

So I proportionally a little longer than the bobcat that would have 44 '' of wheelbase for this width.
This vehicle will not work on pavement, often gravel and dirt, it's easy. Especially since the weight on the rear wheels is lower than the weight on the front wheels, the rear wheels will be easy to derail.
The machine will circulate in the wood, so I wanted it not too late pouring when the terrain is uneven.
For engine power and traction, the Bobcat 60hp is more than 6000lbs without load in the bucket, and my excavator will weigh less than 2400lbs, and will have a lower movement speed, so much torque compared to the weight of the excavator.

I have not seen these motor with valves, are they expensive? My method of 'braking' is not perfect but very affordable.

The excavator tires would not ride well on the road, and the weight on the tow bar would be much too high. It's trailer tires that will be on the ground with trailer hubs, the 4 wheels of the excavator will be 6 '' to 10 '' in the air.

snowblower is offline  
post #10 of 36 Old 10-17-2019, 07:35 PM
2000 Posts and climbing!!!
 
Join Date: Oct 2009
Location: ON
Posts: 2,276
Re: 4x4 Backhoe excavator home made

Okay, you did your homework. I realized the weight was big factor, but I choose not to mention . About 5.8mph. I have a Melroe Bobcat that's 18HP; I have to set speed at about 3 mph to have enough HP for a 360.

What is pressure rating of hydraulic motors?

Girls with large lawns like a guy with a really big deck!
Hydronerd is offline  
post #11 of 36 Old 10-17-2019, 10:10 PM
Super Moderator
 
tracktortag's Avatar
 
Join Date: Dec 2009
Location: ny
Posts: 10,696
Re: 4x4 Backhoe excavator home made

Another great build in the making, Snowblower!


Dave
tracktortag is offline  
post #12 of 36 Old 10-18-2019, 10:11 AM
2000 Posts and climbing!!!
 
Join Date: Oct 2009
Location: ON
Posts: 2,276
Re: 4x4 Backhoe excavator home made

Here is a motor mount counterbalance. Maybe you can find two Case (Ingersol) hill valves.

mmcb-10_520-p-131300-en (1).pdf

Girls with large lawns like a guy with a really big deck!
Hydronerd is offline  
post #13 of 36 Old 10-18-2019, 11:00 PM Thread Starter
Senior MTF Member
 
snowblower's Avatar
 
Join Date: Aug 2011
Location: Québec
Posts: 298
Barn
Re: 4x4 Backhoe excavator home made

Thank you!,

One of the biggest challenges is to manufacture it for less than $ 12,000 CND with hardware, new parts, consumables included and a small profit.

*

I used a valve that allows to adjust the flow that passes in the valve spools, as on my first excavator, it is very pleasant to be able to precisely adjust the speed of work according to what we do.

I'm going to have more tire torque than my first excavator.

The steering (bobcat) will greatly reduce the turning radius compared to my previous excavator.

On the other hand there will not be 2 moving speeds , limitations of costs.

snowblower is offline  
post #14 of 36 Old 10-18-2019, 11:02 PM Thread Starter
Senior MTF Member
 
snowblower's Avatar
 
Join Date: Aug 2011
Location: Québec
Posts: 298
Barn
Re: 4x4 Backhoe excavator home made

Quote:
Originally Posted by 9297oldram View Post
Nice work, you must have quite a shop for that kind of fabrication.
Thank you, but I just have a small garage of 14 'x 24', a small milling table top, a mini lathle, circular saw, grinders, a hydraulic press of my manufacture.

I have a new mig 275amp welder that saves me time with its big duty cycle.

snowblower is offline  
post #15 of 36 Old 10-18-2019, 11:06 PM Thread Starter
Senior MTF Member
 
snowblower's Avatar
 
Join Date: Aug 2011
Location: Québec
Posts: 298
Barn
Re: 4x4 Backhoe excavator home made

Quote:
Originally Posted by Hydronerd View Post
Okay, you did your homework. I realized the weight was big factor, but I choose not to mention . About 5.8mph. I have a Melroe Bobcat that's 18HP; I have to set speed at about 3 mph to have enough HP for a 360.

What is pressure rating of hydraulic motors?
The engines are capable of 2900psi continuous, 19 CU-IN

The speed will be 6 km / h

Thank you

https://blog.bobcat.com/2016/03/m440...oader-in-1962/

snowblower is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 2 (1 members and 1 guests)
1969140
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome