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Volvo EC290B Excavator problem.

E

eddmeddm

New Member
Joined
Feb 16, 2014
Messages
1
Location
Puerto Rico
Hello, I have a ec290blc excavator and it seems to be stucked in high speed mode. The engine goes up fine but when hydraulic power is applied rpm starts to slow down so it needs to release function to prevent unit from entirely shutting down. Any suggestion?
Would appreciate any help.
Thanks,
Alex
 
uffex

uffex

Senior Member
Joined
Jan 23, 2012
Messages
4,464
Location
Lincoln UK
Occupation
Admin
Good day PM
The D7 engine needs 4.5 - 5 bars of fuel feed pressure, the small gear pump driven by belts supplies this. The pump housing has a couple of check valves these are provided for bleeding.
I suggest you fix a pressure gauge after filter see if you are getting enough pressure if not try nipping the fuel leak line runs from the common gallery back to tank.
If you need pics go to excatech.com you can get them from there.
Regards
Uffex
 
L

loi

Member
Joined
Sep 7, 2015
Messages
5
Location
Malaysia
I have Ec290B same issue with this..
Already replace fuel feed pump still the same result..
I notice that the gallery fuel overflow valve can blow by my ... It is possible? .
 
T

TVA

Senior Member
Joined
May 14, 2018
Messages
2,245
Location
USA
That’s why you don’t just go and replace components willy-nilly! You need to properly diagnose systems and find out where the problem is and then fix it. People on this forum can only give you possibilities and steer you in to directions.
Overflow valve, fuel filter, tank strainer ...
Problems like this is either engine problems or torque limiters not working properly!
I always suggest check engine first.
 
T

TVA

Senior Member
Joined
May 14, 2018
Messages
2,245
Location
USA
loi said:
I have Ec290B same issue with this..
Already replace fuel feed pump still the same result..
I notice that the gallery fuel overflow valve can blow by my ... It is possible? .
Click to expand...
Was your machine sitting idle for long time before use?
 
C

Cat_man320

Well-Known Member
Joined
Nov 11, 2012
Messages
175
Location
Canada
could be your hydraulic pump or some hydraulic valve telling the pump to go full volume. My Cat 320 had a wire disconnected behind the seat and every time I'd go to move something the engine would die . discovered the wire off , installed it and everything is good .
 
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