• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Start up Fuel issue

E

Excavator jay

Member
Joined
Dec 9, 2019
Messages
20
Location
Pa
We have a ingersol rand zx125 excavator that’s a bobcat with a ingersol sticker. 29k # machine


Motor - Detuz 6 cyl

It will fire with either every time but run only at idle for the first 15-20 min, after that you can run full rpm all day, and it will restart fine. Let it sit over night and it will not start on it’s own.

I cleaned the fuel tank very good and changed out the filters twice along with fuel additives.
I’m thinking something along the lines of injectors or injection pump but why will it run fine all day after the initial start ???
 
LACHAU

LACHAU

Senior Member
Joined
Aug 11, 2009
Messages
991
Location
Saigon, Vietnam
I refer to Ingersoll Rand excavator model ZX125 specification; it's been install a engine with 04 cylinders only???!!!
Could you inform what model of DEUTZ engine is??
 
E

Excavator jay

Member
Joined
Dec 9, 2019
Messages
20
Location
Pa
50ZLX06 .1038 - engine family

BF4M 2012 - Model
 

Attachments

  • 2CDF5C54-4845-4A48-80F1-079AF5E19E87.jpeg
    2CDF5C54-4845-4A48-80F1-079AF5E19E87.jpeg
    3 MB · Views: 5
P

partsandservice

Senior Member
Joined
Feb 14, 2011
Messages
846
Location
Georgia
The fuel supply pump that is integrated into the belt pulley has a drain back check valve in it IIRC that will let the fuel drain back overnight if damaged or hung open.
 
E

Excavator jay

Member
Joined
Dec 9, 2019
Messages
20
Location
Pa
partsandservice said:
The fuel supply pump that is integrated into the belt pulley has a drain back check valve in it IIRC that will let the fuel drain back overnight if damaged or hung open.
Click to expand...
So are you thinking it’s bad and that’s why it won’t start in the motioning on it own ?
 
E

Excavator jay

Member
Joined
Dec 9, 2019
Messages
20
Location
Pa
Typo - won’t start in the morning ?

so the check valve is bad and once you use the either to start it then it will run - but after it sits then the fuel all drains out and air is into the system .... am I on the right track ?
 
P

partsandservice

Senior Member
Joined
Feb 14, 2011
Messages
846
Location
Georgia
Yes that is idea. You could probably start the engine in the morning without ether if you were to prime full at the injectors. Any of the fuel lines/ connections could cause a fuel leak down as well.
 
P

partsandservice

Senior Member
Joined
Feb 14, 2011
Messages
846
Location
Georgia
Only by removal and inspection. I have dealt with that issue before with a 6 cylinder version, but has been quite a while so ... Exact location of the check is fuzzy in the memory. I would remove the supply pump and disassemble to address the check and also look for wear in the pump.
 
You must log in or register to reply here.
Top