masterwelder
Well-Known Member
CJC00776, 3046 engine, 6500 Hrs
All hydraulic functions pull engine down. Worse when switch is flipped to manual mode. I calibrated throttle, changed fuel and air filters, checked screen at banjo fitting before lift pump (was clean), made a adapter that screws into bleeder port on filter housing to check fuel pressure. Pressure at idle- 18 psi, max rpm no load 14 psi, max rpm curling bucket or stick to dead head 7 psi. No smoke what so ever at anytime or throttle setting. Also did the same with a can of fuel as source run directly to lift pump. Got same results. I checked boost late last season and I believe it was around 9 to 12 psi full throttle while digging.
I don’t believe it a HP problem but I’m unsure and can’t find anywhere a fuel pressure or boost pressure spec.
Engine starts right up, never stalls, only thing that is a little unusual is a shaking/ vibrating on setting 3 and very slight in setting 4, all other settings run smooth.
I do not have service manual yet- I’m looking, any suggestions on where to buy?
I will be changing the pilot, case drain and hydraulic return filters this am. I have checked ground continuity to the hydraulic pump solenoids (good), power supply was 27 volts. There is a third electric 2 wire sensor with good ground and I got a 11.75 volt reading on that one.
No active codes showing.
I know where to go to do a prv calibration but I don’t know how to do it.
Seams to track straight. There is a small bit of hydraulic fluid dripping out of bell housing (bad seal on input shaft?).
I don’t have hydraulic gauges or flow meters yet- I’m pretty good mechanically and have read a lot of threads to get up to speed on basic hydraulic terminology and operation on an excavator.
Can anyone walk me through the prv calibration? I would like to preform after I change filters.
Can anyone speak to the fuel and boost readings for the 3046 engine?
Any further suggestions and/ or comments on the fuel system or engine power?
All hydraulic functions pull engine down. Worse when switch is flipped to manual mode. I calibrated throttle, changed fuel and air filters, checked screen at banjo fitting before lift pump (was clean), made a adapter that screws into bleeder port on filter housing to check fuel pressure. Pressure at idle- 18 psi, max rpm no load 14 psi, max rpm curling bucket or stick to dead head 7 psi. No smoke what so ever at anytime or throttle setting. Also did the same with a can of fuel as source run directly to lift pump. Got same results. I checked boost late last season and I believe it was around 9 to 12 psi full throttle while digging.
I don’t believe it a HP problem but I’m unsure and can’t find anywhere a fuel pressure or boost pressure spec.
Engine starts right up, never stalls, only thing that is a little unusual is a shaking/ vibrating on setting 3 and very slight in setting 4, all other settings run smooth.
I do not have service manual yet- I’m looking, any suggestions on where to buy?
I will be changing the pilot, case drain and hydraulic return filters this am. I have checked ground continuity to the hydraulic pump solenoids (good), power supply was 27 volts. There is a third electric 2 wire sensor with good ground and I got a 11.75 volt reading on that one.
No active codes showing.
I know where to go to do a prv calibration but I don’t know how to do it.
Seams to track straight. There is a small bit of hydraulic fluid dripping out of bell housing (bad seal on input shaft?).
I don’t have hydraulic gauges or flow meters yet- I’m pretty good mechanically and have read a lot of threads to get up to speed on basic hydraulic terminology and operation on an excavator.
Can anyone walk me through the prv calibration? I would like to preform after I change filters.
Can anyone speak to the fuel and boost readings for the 3046 engine?
Any further suggestions and/ or comments on the fuel system or engine power?