johnsopa
New member
Hi folks. My Bobcat CT230 (same as the CK30 HST) is bogging down when under load at RPMs over 2k.
Air filter is good. Fuel filter replace several times. There's good fuel (drained/replaced three times). Injection system has been bled a couple times. All to no avail...
However, I think I've found the issue. I shined a light through the clear plastic fuel filter housing and I now realize that the housing is not quite full. It ranges from half full (when checked immediately after bogging) to about 1/8" from the top of the housing (when idling for awhile).
There is no leaking in any of the lines going to/from the filter housing.
When I disconnect the line coming from the fuel tank to the lift pump, there is nice clear flow of diesel. Gas cap removal doesn't change the flow rate, so I think the vent is fine on the cap.
When I remove the output line from the lift pump and put my finger over the output, there is a little bit of pressure but not much. I can very easily stop the flow.
I replaced the line going from the lift pump to the housing so it's not clogged.
There's no leaking at the housing and the off/on/air valve appear to be working fine.
I'm not a diesel expert, but I think the fact that the fuel filter housing isn't full is bad and is the core problem.
Does this point to a lift pump problem? Specifically, if the fuel filter housing isn't staying full, then it seems to me that the lift pump isn't supplying enough diesel under pressure to the housing.
Am I thinking right here?
Thanks!
Air filter is good. Fuel filter replace several times. There's good fuel (drained/replaced three times). Injection system has been bled a couple times. All to no avail...
However, I think I've found the issue. I shined a light through the clear plastic fuel filter housing and I now realize that the housing is not quite full. It ranges from half full (when checked immediately after bogging) to about 1/8" from the top of the housing (when idling for awhile).
There is no leaking in any of the lines going to/from the filter housing.
When I disconnect the line coming from the fuel tank to the lift pump, there is nice clear flow of diesel. Gas cap removal doesn't change the flow rate, so I think the vent is fine on the cap.
When I remove the output line from the lift pump and put my finger over the output, there is a little bit of pressure but not much. I can very easily stop the flow.
I replaced the line going from the lift pump to the housing so it's not clogged.
There's no leaking at the housing and the off/on/air valve appear to be working fine.
I'm not a diesel expert, but I think the fact that the fuel filter housing isn't full is bad and is the core problem.
Does this point to a lift pump problem? Specifically, if the fuel filter housing isn't staying full, then it seems to me that the lift pump isn't supplying enough diesel under pressure to the housing.
Am I thinking right here?
Thanks!