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Cat D9G Power?

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3 years 3 weeks ago #226494 by gvanhouten
Cat D9G Power? was created by gvanhouten
Hi guys,

Was working the old girl yesterday on some iron pines that have a pretty good root ball system and it just seems that the old girl just does not have the pushing power she should.  I am thinking torque converter and or filters to check.  All fluids are great.  The engine is running very well but it seems that when I am up against a tree trying to push over the engine does not come up to full or half RPM.  When I was pushing before she was a beast now she is a bit wimpy... Any suggestions or do you believe I am on the right track?  Thanks guys hope everyone is well.  George 

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3 years 3 weeks ago #226503 by Rome K/G
Replied by Rome K/G on topic Cat D9G Power?
Hello George, better to send us a video so we can hear what it is or is not doing.

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3 years 3 weeks ago #226504 by kittyman1
Replied by kittyman1 on topic Cat D9G Power?
as Rome suggested, a video would be best....we like videos..

-since we're talking diesel power, my first wild guess would be fuel system....lack of fuel...fuel restriction of some type, lines, filter(s) etc...

always dropping GOLD, all you have to do is just pick it UP !

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3 years 3 weeks ago #226505 by neil
Replied by neil on topic Cat D9G Power?
Birds built a nest in your intake?

Cheers,
Neil

Pittsford, NY

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3 years 3 weeks ago #226520 by Rome K/G
Replied by Rome K/G on topic Cat D9G Power?
High idle rpm is 1455 +-30 rpm, 475 +-10 rpm, set decelerator at 700 +-50 rpm
I take it you already checked the rack and fuel pump lifter settings? If I remember that was an ordeal.
Fuel pressure good?
Check rpm at hour meter, that is half engine speed, or use a laser tach.

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3 years 3 weeks ago #226522 by neil
Replied by neil on topic Cat D9G Power?
Rome, is that decelerator setting the rpm that the engine should be at when the decelerator is fully depressed? In gear or neutral?

Cheers,
Neil

Pittsford, NY

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3 years 3 weeks ago #226524 by Rome K/G
Replied by Rome K/G on topic Cat D9G Power?
Fully depressed, neutral.

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3 years 3 weeks ago #226526 by gvanhouten
Replied by gvanhouten on topic Cat D9G Power?
I will be taking some video later today... Actually my wife will.... Yes, the rack was the first problem and then the rest.... Fuel pressure looks good starts right up... I am thinking maybe decelerator lever as engine just does not come to life with throttle fully open and decelerator engaged. When I lift my foot back engine does increase RPM of course in Forward 1 she moves and all just hard to get engine winding up. Thats why I thought torque converter first... I will take videos and post later today. Remember this is Hawaii so expect them tomorrow...

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3 years 3 weeks ago #226527 by neil
Replied by neil on topic Cat D9G Power?
Easy check would be that the decelerator really is releasing all the way and not holding back due to binding or interference. Does the engine go all the way to high idle in neutral? It can go to high idle but not be getting full fuel under load, which "usually" is because the rack is not opening all the way up under full load but it could also be intake restriction. If restricted, it would make black smoke (all the time, not just the rolling coal at acceleration : ). Could also be exhaust restriction.

Cheers,
Neil

Pittsford, NY

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3 years 3 weeks ago #226531 by Wombat
Replied by Wombat on topic Cat D9G Power?
How much oil in the converter case after shut down? There should not be much, if it is flooded it will act like a brake. This can be caused by converter failure, or scavenge pump failure or a blockage. Take a bucket underneath, you should only get about a gallon if all is ok.
best of luck, Wombat
The following user(s) said Thank You: edb

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