D
Digerman
New member
Hi, I have a Volvo ecr28 my problem is, it’s pulling to left over a very short distance, it won’t go
up a very small incline. It Digs fine, no problem. The digger was sent to a large reputable company for investigation and repair. Attached is the report.
Please see below a summarisation of my engineer's reports, unfortunately I do not have an official report from Volvo, but because I was present whilst he was here, I will summarise what was investigated on your machine.
Work Carried out Volvo ecr28
When starting the machine to move it to the wash area to be cleaned off, machine would not start and seemed like something hydraulically was stuck on after investigation and testing we found this issue was being caused by a faulty pump. We contacted Volvo who took the pump back and issued a full credit. A new pressure relief valve was fitted to the machine as this was found to be what was initially causing the drop in pressure (this was advised to us by Volvo).
Valve changed and the pressure issue was solved.
I then spoke with yourselves to tell you the machine was ready, at this time you asked me if the machine was now tracking straight to which I replied now the issues noted above would not cause the machine to track off to one side.
Work carried out
The next point of call was to get SMT Volvo to attend our workshop to investigate the issue on the machine.
Work carried out by Volvo & our Engineer
I then spoke with our supplier of the track motors and explained the issue we were having and they we certain that it must have been a faulty unit, so they agreed to send another track motor out to us.
We then fitted the replacement motor and found that the issue remained.
Whilst the tracks were removed, we decided to swap the tracks from left to right in case this was the issue, which it was not. We also check over all the under carriage which again was all fine apart from X 1 bottom roller being seized, this was not found to be the cause of the issue as we removed the bottom roller and ran the machine with it off and the issue remained.
As mentioned to you on the phone of Friday, we at a loose end with regards to your machine and the issue that remains. We have spoken to many different people within our industry to try and sort the issue, but all are coming back with the same prognosis as we are.
Can anybody help, all suggestions greatly appreciated.
Kevin
up a very small incline. It Digs fine, no problem. The digger was sent to a large reputable company for investigation and repair. Attached is the report.
Please see below a summarisation of my engineer's reports, unfortunately I do not have an official report from Volvo, but because I was present whilst he was here, I will summarise what was investigated on your machine.
Work Carried out Volvo ecr28
- Washed off machine
- Removed counterbalance
- Checked over main pressures which were found at 235 bar
- Pressures found to be dropping when machine was warm
- Drained hydraulic oil from machine
- Removed hydraulic pump as the testing carried out pointed the hydraulic pump was at fault.
- Fitted new hydraulic pump to machine
- Changed hydraulic filter
- Filled hydraulic system with 40lts of new oil
- Tested hydraulic pressures at valve block now at 250 bar
- Stripped down king post
- Removed boom and king post from machine
- Pressed out bushes from king post and replaced with new
- Removed bushes from boom arm and replaced with new
- Removed bushes from chassis of machine and replaced with new
- Refitted king post and boom to machine
- Fitted new pins and greased
When starting the machine to move it to the wash area to be cleaned off, machine would not start and seemed like something hydraulically was stuck on after investigation and testing we found this issue was being caused by a faulty pump. We contacted Volvo who took the pump back and issued a full credit. A new pressure relief valve was fitted to the machine as this was found to be what was initially causing the drop in pressure (this was advised to us by Volvo).
Valve changed and the pressure issue was solved.
I then spoke with yourselves to tell you the machine was ready, at this time you asked me if the machine was now tracking straight to which I replied now the issues noted above would not cause the machine to track off to one side.
Work carried out
- Carried out flow and pressure tests on the track motors & at the valve block
- This determined that there was a fault with the left-hand track motor
- Ordered and fitted x 2 new track motors
- Machine still carrying the same fault
- We then stripped and resealed the rotary joint.
- This also did not cure the issue
- We swapped all components from left to right
- The issue remained V
- We then swapped the four hoses from left to right that go from the rotary joint to the track motor, to check for hoses delamination or blockages.
- The issue remained
The next point of call was to get SMT Volvo to attend our workshop to investigate the issue on the machine.
Work carried out by Volvo & our Engineer
- Reset all pressures on machine
- Tested pressures as at valve block and pump
- Tested pressures when dead ending services to the tracks
- Checked over all work we had carried out
- Could not determine what the issue was
- Mentioned maybe trying another track motor as they may be a fault in one of the new ones
I then spoke with our supplier of the track motors and explained the issue we were having and they we certain that it must have been a faulty unit, so they agreed to send another track motor out to us.
We then fitted the replacement motor and found that the issue remained.
Whilst the tracks were removed, we decided to swap the tracks from left to right in case this was the issue, which it was not. We also check over all the under carriage which again was all fine apart from X 1 bottom roller being seized, this was not found to be the cause of the issue as we removed the bottom roller and ran the machine with it off and the issue remained.
As mentioned to you on the phone of Friday, we at a loose end with regards to your machine and the issue that remains. We have spoken to many different people within our industry to try and sort the issue, but all are coming back with the same prognosis as we are.
Can anybody help, all suggestions greatly appreciated.
Kevin
