755 new owner: needs info

[v8only]

Hey all,

Im new here and I am a new owner of a 1988 John Deere 755 4wd with a FEL and 48" tiller.

I have ordered a owners manual and service manual from JD but I need some quick information on some maintenance items such as filters and fluids to change, if you guys have WIX product numbers that would be great. Also since I have no idea on the past history what should I check out to ensure all is working properly.

Also what is the correct starting procedure? The previous owner just told me to let the glowplugs warm up (light to shut off) put the throttle to halfway and crank till she fires. Is this correct is there a choke for cold starting?

thanks

 

[wthompson]

check NAPA, they have quality filters and other parts like belts and such here's the link... NAPA AUTO PARTS

 

[beenthere]

Also what is the correct starting procedure? The previous owner just told me to let the glowplugs warm up (light to shut off) put the throttle to halfway and crank till she fires. Is this correct is there a choke for cold starting?

:welcome: to the forum

That is the correct procedure. With a diesel, there is no "choke" to pull, as there is no carburetor. One of the beauties of a diesel.

 

[RoyJackson]

Welcome to TBN!!

Go with BeenThere's starting instructions...never use ether!!
Since I think you're in Canada (Manitoba), you might want to consider installing a block heater too.

 

[v8only]

thanks. Yes for winter use i will be installing a block heater. How many times should i have to crank before she fires up?


Also do you guys have a list of grease nipples to hit and i will do an engine oil/filter change, fuel filter, both air filters. Anything else i should do? it has over 2000 hours on it.

Thanks

 

[beenthere]

The grease zerks will be every location that moves (very likely). And when the service manual and operators manual arrives, you will get that information specific to the 755.

Times to crank before start? Once for about 3 seconds max if operating well. Mine fires off after 2-3 revolutions.

If you change all the fluids and filters, including the radiator coolant, you should be good to go. Then just follow the manual. There will be test procedures in the service manual to troubleshoot if something comes up. As well, TBN will be here to help.

And fill out your bio for additional info we may use to help you out.

 

[v8only]

thanks.

Well mine does not start after 2-3 revs im cranking it over for at least 15 seconds max at least 3 or 4 times....

The battery is new, glow plugs are new and it turns over fairly fast.

 

[beenthere]

Maybe the 2000 hours are showing. Others may have some helpful suggestions.

 

[v8only]

well im not going to think i fixed the problem but, I put a slow charge on the battery, put new battery terminals on it cleaned the grounds, and within 10-15 cranks she fired. **** of alot better than before.

I would still like ensure the machine is going to be reliable (start fast) so what is the next step? The glow plug light activates for maybe 5-8 seconds shuts off then I crank. Is this long enough? it is about 15 degrees C (59 F) out right now.

 

[Mechanos]

I have a 955 but don't have an owner's manual. I haven't been advancing the throttle to start it... I just crank it over and it fires right up.

 

[malwayne55]

Starting instructions and grease locations from the 755 manual. Hope this helps.

 

[v8only]

great thanks!

So tonight i went to start it up again and it took a while to get it started. Once it fired up i let it run for a few minutes then shut it down. I used a light test on the glow plugs to ensure that they were working and they are getting power and continue to get power once my glow plug indicator light goes out.

My dad mentioned to try and start it at full throttle instead of the half way position and as mentioned in the PDF copy of starting instructions posted by Malwayne55 it says it should be placed between half and full throttle. This seems to be working alot better, but as i posted before i want this tractor to run top notch.

What else can do I do ensure i have proper start up.

Thanks

 

[burnieman]

Replace the fuel filter. I know my Cummins 5.9 is hard to start when the filter is starting to get restricted. Just a thought

 

[RoyJackson]

great thanks!

What else can do I do ensure i have proper start up.

Thanks

Since the tractor has 2000 hours on it, those glow plugs are probably coked up (soot from unburned fuel). Even with power getting to them, they may not be efficiently heating the cylinder.
Might be worthwhile pulling them out and cleaning (if possible) or replacing (better way to go, IMHO).

I've only replaced glow plugs once...in an ancient Mercedes Benz 240 diesel. The threads were pretty gunked up and it took quite a while to get them out. These aren't something you want to break off while removing.
So, if you do pull the glow plugs, take your time...backing them out and then tightening slightly (but NOT tighten...just a quarter to half thread) might help.

 

[v8only]

I will look that over, I know the previous owner changed the glow plugs 2 years ago from an old invoice he gave me.

How do I change the fuel filter? the bowl is always full of fuel.

 

[laurelrun]

You are ahead of me with the fuel filter problems I had with my 855.

I think the fuel filter bowl is similar or the same. Just use a wide pair of pliers to gently turn open the ring at the top of the fuel bowl. Mine was pretty tight, so I used a prybar and some light tapping to crack it loose. Swap out the filter element, and replace.

Then open the bleed screw to fill the bowl again and you should be all set. If necessary, bleed the injector pump as well. Hopefully you won't also have to bleed the injectors themselves.

Avoid my mistake and don't overtighten the bleed screws. I stripped mine out and had to replace the entire assembly. Not a tough fix, but it cost me about $50 I didn't need to spend ruining a brand new filter unit. My old one had a loose elbow fitting that was sucking air. The 2nd new one works like a champ!

 

[v8only]

ok so i ended up running out of fuel and i had to rebleed the system. I noticed the bulb was only 3/4 full before I bleed, after bleeding the system the bulb is 100% full, would this have caused my hard starting problem?