Kubota 1613ss bogging under load

[Kanada]

Hi there, I have a Kubota 1613ss that boggs under load. I've changed the fuel filter, hydraulic fluid and filter with no changes in behaviour.

It will start to bog down then be fine for a minute then bog again... Over and over

If I run it for an hour or two it does seem to work better

Any help is greatly appreciated

 

[North Idaho Wolfman]

Did you check the water separator?
It's before the filter.
Have you drained the bottom of the tank? There is a valve for that on it.
It could be the electric fuel pump failing.
Remove the line to the Injection pump and check for flow with key on.

FYI: Can possibly give you better answers if you give me the serial number.
As there is not a KX161-3SS.
There is a
KX161-3
Kx161-3S
Kx161-3ST
And the fuel system is different between all those models.

 

[Kanada]

I'll go try that right now.
Here's a picture of plate

 

[rentthis]

Chech the fuel hose connection fittings at the water separator. I have had several cause that problem. If you can turn the fittings by hand, it's probably sucking air. They can be sealed temporarily with JB weld.

 

[North Idaho Wolfman]

I'll go try that right now.
Here's a picture of plate View attachment 93499

Thanks, got to love Kubota's inconsistency with product names and documentation names.
So it's a KX161-3S for parts and build info.
And as Rentthis said, that style of separator is know to have loose fitting on it, so check that too.

 

[mikester]

My M59 TLB bogs down when I am in high gear trying to push and lift a 5 ton load. When I stop pushing and lifting the engine recovers and it works better. When I'm not lugging the engine it works good. Does this sound familiar?

 

[Ozzyris]

Workshop Service Manual

Kubota_KX121-3_KX161-3_Workshop_Manual_Excavator.pdf

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