My Lawnmower Forum banner

1 - 5 of 5 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter · #1 ·
Hello all. I recenty purchased a property with 5 acres, soon after, I purchased a used JDF935 with a 72" deck and snow thrower, 1008 hrs. I'm a complete noobie, and I have never worked on anything like a 935 my entire life, so I guess I have to learn. :D

I've used the mower twice. After using the unit the first time I notice tranny fluid on my garage floor. After the second time there was a bit more, so, fear of ruining the unit I'm not going to use it till I fix it.

I think the fluid is slightly leaking out of the tranny fluid filter, so I'm going to replace it and see what happens. I also notice the fuel glow light never goes out before I start the mower with both right and left tanks. The manual says it should go out after 8 secs, I've left it on for 4 minutes and it never goes out. There are two fuel lines to each tank, and a set of terminals. I'm not sure if the terminals are thermistors or if they are for the heater. I tested voltage (thinking it was a heater), I'm getting 6 volts on the right, and 7 volts on the left (I also cleaned the terminals. I also check amperage, got 0 amps. However, I'm not sure if I'm supposed to be getting amps there, especially if it's not a heater, and just a thermistor.

Behind the seat, right side I can here something rapidly clicking, kinda faint. Perhaps that's the heater? I removed the two locking bars and about 2 table spoons of diesel spilled out before I could snap it back together. I stopped there, because I don't know what I'm doing. IDK

Any help or insight would be appriciated.

Thanks all!
 

·
Premium Member
Joined
·
6,106 Posts
Hi Glossy, welcome to MLMF. Your new purchases sound exciting. Thanks for your questions, let's see if we can come up with some answers for you.

From the sounds of things, you may have come up with your own answer for the leak. Anyplace there is a joint or a seal on anything that's carrying a fluid can potentially be a source for leaks. Could be it just wasn't tightened up enough or worked itself loose. You've already checked the owner's manual, so maybe there is a trouble shooting section to narrow down possible solutions, and you've probably already seen descriptions in it on how to perform basic maintenance just so you know you are going about it in the right way. I do a lot of work on my own stuff, but I still go back to the manual before doing any of it.

I'm not familiar with glow plugs, so I'll let somebody else step up on that one.

Let us know how it goes for you.
 

·
Administrator
Joined
·
6,224 Posts
I found a wiring diagram for the F935. It might not match yours exact depending on serial number but at least it will give some place for you to start. The terminals on the fuel tanks look to be variable resistors so you won't find much current flow there. If you measure resistance across the terminals and rock the unit you should see some fluctuations as the fuel sloshes around. If your fuel gauge is working normally they are fine.

I've never owned a diesel so I won't be of much help there as far as glow plug operation either. I don't know whether they cutout based on time or temperature or some other input that a control module is looking for. (They heat up the individual cylinders on a cold engine since you don't have spark plugs with a diesel. Once you get the engine started, it warms on it's own from combustion enough to light the fuel to burning and they no longer need to be turned on.)

The slight clicking sound might just be the fuel injector pump or injector noise. That might well be a normal sound for that engine. But again I don't really know, just guessing. ;)

Here's the wiring diagram:

 

·
Registered
Joined
·
3 Posts
Discussion Starter · #4 ·
Thanks for all the info and the wiring diagram, that should come in handy. Well after doing some research, my glow lights are working. They don't fully shut off, so I thought they never shut off. But after 8 secs or so, the light fades. I changed the oil filter and added some oil, however the next day there was a puddle of oil right under the tranny, Ughh...

Will have to do some further work to find the leak. Perhaps a seal or joint like you guys mentioned. Once I find it, I'll report what it was.
 

·
Registered
Joined
·
3 Posts
Discussion Starter · #5 ·
I tightend up some bolts around the transmission and added some ucky pucky around some of them but I'm still getting a leak. I'm thinking I might have to pull the tranny and rebuild it. I don't want too, but I have to get the leak to stop. :mad:

Other than that, I'm very happy with the machine. A bit slower than I like, but that might have to do with the transmission too.
 
1 - 5 of 5 Posts
Top