I have a question or two for 1370 Rod or anyone else familiar with the 70 series diesel engine fuel systems.
Last week I started plowing my 84 acres. A problem soon developed. My 1170 pulls good for a short distance and then sputters.
Since fixing the clutch and having to disconnect the fuel line behind the bleeder hand pump, the 1170 had only been lightly loaded and no signs of a fuel system problem. As a matter of fact for the last several years, I had only used the 1170 on light loads because of the weak clutch.
But after hard plowing about a quarter of a mile, the 1170 sputtered. My first thought was fuel filters so I proceeded to change the fuel filters. I remembered I had found the bleeder hand pump to be bad when I was trying to bleed the fuel lines and restarting the tractor this past spring. A CaseIH parts man tried hard but said the OEM part number of the bleeder hand pump is no longer available and no replacement number was listed. I had to patiently let a full tank of fuel and gravity bleed the system.
Changing the fuel filters did not fix the problem or change anything; another quarter of a mile plowing and more sputtering.
This time, I inspected the transfer pump internals and they looked fine but the symptoms include maybe low fuel flow or maybe air getting sucked into the supply lines. My first QUESTION is what is you experience with 70 series transfer pumps going bad?
This prompted me to remove a panel and inspect the fuel line connection that I had disconnected last winter to fix the clutch. I then saw the bad bleeder hand pump was wet with fuel as shown above.
I also discovered the bad seal around the bottom that got busted when I removed it. I am assuming this bad seal may be a source of air leak into the fuel system. I will find out if an o-ring fixes any leak here.
My 70 series IT repair manual shows on later models the bleeder hand pump integral with the transfer pump.
My other QUESTION is if I get a new transfer pump for the later 70 series models, with the built-in bleeder hand pump, will it work on my early 1170?