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7305 - Lack of power
I'm wondering if someone can help me out with an issue I'm having with my 1998 7305 (hydro) which currently has 442 hours. When I bought it (used with 350 hrs) the dealer went through it - changed all the oils & filters and gave it a once over for me so that I would not have to do any scheduled maintenance for a period of time.
My problem: I've noticed that it seems to be losing its power. Lately when I go to drive it to the neighbors or the park to do some work I can't drive it in High Gear - it starts speeds up fine, but shortly after I get up to speed it starts slowing down - to the point that it is creeping along. I've also noticed that if I'm plowing the driveway it tends to bog down as I am pushing the snow. Thinking on it, I believe that when I was mowing this fall it would slow down as I would go up hills (more than normal).
Here is what I see when it does slow/bog down: the rpms of the motor go down with the speed - as it gets slower I sometimes see bluish smoke coming from the exhaust - lastly a few times it has smelled "hot".
I thought that maybe it needed a hydro fluid & filter change, so I went to my local dealer, bought a filter (both hydro and hydraulic) and the oil and changed it - it seemed to be better for the next few runs but then it started acting up again.
I'm wondering if there is something I'm missing? Any help would be appreciated!!!
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7305 - Lack of power
Have you changed the fuel filter and cleaned the bowl also while doing this look for water condensation I would change fuel filters and add some time of fuel additive.
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7305 - Lack of power
I did replace the fuel filter and the air filter as well. I haven't seen anything indicative of a problem such as condensation in the bowl.
As far as the lack of power - as I mentioned I see it when I'm driving in high gear (all the time) and it doesn't matter if I'm going up hill, on flat ground, or down hill - it always slows down. In fact - the rpms on level ground will go from 2000 down to 1200 as it slows (I don't usually let it drop that far but have seen it drop that much once).
Also, I've noticed that I don't seem to have as much power at my mower either. I used to go through long grass with no problem, but now even the mower can bog down when I'm using it. I used to do my mowing in M gear - but now I have to use L when I'm working on the inclines.
Any other ideas?
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7305 - Lack of power
If the temperature is OK. Then I would check the filter on the intake line which is in the fuel tank. The screen takes out the bigger particles which is what you commonly get in the diesel fuel. If this clogs then the system has trouble pulling enough fuel. As you run at speed this is when you see the problem this is indicative of this root cause as the finds in the bottom of the tank tend to collect on the filter screen and then drop off when you stop.
Also make sure that you have the winter blend as you could get waxing this time of year with the same result, a clogged intake screen.
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7305 - Lack of power
Do you mow in four wheel drive?
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7305 - Lack of power
On a hydro, particularly in high range, if you set the RPM's too low it will bog down, increase the RPM up to 2600 or so, and let us know if it still bogs down. Also if the throttle RPM is too the hydro pedal will be more sensitive sudden chomps on it so be gentle on the peddle also.
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7305 - Lack of power
As far as the rpms that I'm running at in high gear - I have run as high as 2700 and the same thing happens at all ranges. As I mentioned before, I do accelerate (not jump on it) up to speed. But once I'm there for a short period of time it begins to slow down - and will continue to slow down to a crawl. As I mentioned the rpms will drop as the speed drops. Now, if I left up on the peddle some then the rpms jump back up but the tractor never picks the speed back up if I slowly step down on the peddle again.
As far as the strainer in the tank for the fuel line - I've never looked at it. Is it easy to get to? I'm trying to visualize my tank - they are a molded with a soldered line coming off the bottom where the fuel line connects (I believe). How do you get to the strainer inside??
Yes - it is getting cold here now. I currently have #2 but have a fuel additive to help me get through this tank. I'll be running winterized fuel till spring. But this problem is occuring in the summer as well as now.
Lastly, I mow in 2 wheel drive for most of my property. There are however a few areas where I use 4 wheel so I don't slip and tear up the ground.
I think I mentioned (maybe I didn't) that this problem has slowly come and got worse and worse - then I did the changing of the filters and the fluids and it seemed to pick up a bit for a short period but then it came back on again.
I appreciate everyones help!
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7305 - Lack of power
You should check the brakes.
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7305 - Lack of power
Art - when you say check the brakes - do you mean the linkages? What should I look for (I'm new to this with my tractor - but mechanically inclined)? Am I looking for binding - lack of travel - or physically checking the brakes themselves?
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7305 - Lack of power
To run a hydro you don't wear out clutch's and the other good thing is they don't wear the brakes out like on a gear drive as you hardly use them because the hydro's hold back. Unfortunatly the brakes aren't being used much so they tend to rust up a little and we have been seeing where they are being held on by the rust. The petal often feels nearly the same but you will find a dead or no resistance in the petals early travel. Then it will feel like they are hard as a rock. They do tighten up the more you drive from the heat.
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7305 - Lack of power: Cub Cadet -- Other Tractor Brands Discussion Forum
Tutorial on Murf pipe needed
12-17-2003, 11:40 
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