ec160b starts but takes too long.

[jerod]

Hi guys, I have a volvo ec160blc that takes too long to start. It starts and runs ok. Bled the fuel system, changed the filters and changed the fuel pump. Still doing the same thing. Any help would be great.

 

[jerod]

Nobody has this problem on volvo excavators?

 

[uffex]

Good day jerod
I suggest you begin check the primary pump pressure before and after filter should be about 700 psi, it may be that it takes time to build up pressure, hence the long cranking time.
Kind regards
Uffex

 

[jerod]

Uffex, thanks for the reply. I do believe the fuel pump is only a pickup pump. The actual fuel injection and pressure is in the injectors. I tested the psi and the relief valve is supposed to be 9.5 bar (135psi). Talked to a volvo parts guy. Very slow to reach 9.5 bar. I replaced the filters and pump and bled the fuel system. Still long starts.

 

[Ben Witter]

Is the problem only upon initial start or does it act the same upon restarts? You could have air intrusion at the hand pump, primary filter or fuel lines. Or your problem could be low cranking speed due to starting system problems or excessive load from the hydraulic pumps.

Does the engine run strong and smooth? Any smoke?

 

[jerod]

Engine runs strong. Every time you start it, even when you have been running it for a while, turn it off, go to start it again, same result every time. Long startups. Transfer pump has been replaced too. Thanks Ben.

 

[jerod]

Battery voltage before starting, 24.5v. When started, 27.7v. Not bad.

 

[uffex]

View attachment EC160B.pdf

Good day Jerod
Suggest this test as it has the same issue each start up watch for pressure and drain time.
Kind regards
Uffex

 

[Ben Witter]

Fuel feed pressure for the D6D engine is 50-72PSI not 700PSI. Also this is not a common rail engine. The easiest way to check feed pressure is with a banjo bolt with a test nipple incorporated into the fuel filter lines. You should see at least 20PSI after cranking it for a bit.

 

[uffex]

Good day guys
Stand corrected however a common feed to all injectors would you prefer the a common pipe it means the same.
KR
Uffex