Fiat 70CI. Repairs, modifications and stories.

[Jeembawb]

Yes thanks,it looks like the core fits into the top ad bottom panels but am wondering are they soldered where they join or some sort of mechanical seal ?

Looks like a gasket there I think Gaz

 

[Garrie Denny]

Thanks.

 

[Garrie Denny]

Gin-Gin Garrie here, the bottom track rollers on my70CI. Are they sealed lubed or is there a grease nipple for them ?

 

[Roycehg]

Hydraulic Strainer Filter?

Hello Everyone..I have just bought myself a 70CI..I am curious to see how the hydraulic system is filtered? there is no filters in the hydraulic lines, and the hydraulic tank is a sealed tank..surely there is filter somewhere. The dozer has a new hydraulic pump and valve body so I want to make sure the system is filtered properly.

Cheers Roycehg

 

[nutwood]

Gin-Gin Garrie here, the bottom track rollers on my70CI. Are they sealed lubed or is there a grease nipple for them ?

Sorry Garrie, I replied earlier but it seems to have got mislaid! The rollers are meant to be oil filled, SAE 140. That said I have seen a home made adaptor, designed to screw into the filler hole, that was simply a reducing bush with a grease nipple to allow the roller to be filled with grease.
I hunted down the correct attachment and the appropriate oil pump. Seemed the simplest in the long term. I'll put some images up but you might have to wait a few days as the dozers up the back.

 

[nutwood]

Hello Everyone..I have just bought myself a 70CI..I am curious to see how the hydraulic system is filtered? there is no filters in the hydraulic lines, and the hydraulic tank is a sealed tank..surely there is filter somewhere. The dozer has a new hydraulic pump and valve body so I want to make sure the system is filtered properly.

Cheers Roycehg

Welcome to the world of Fiat dozers!!
I believe there's a few different arrangements for the hydraulics on these machines. I'm told they were originally imported into Australia as agricultural tractors (import duty free) and had the earthmoving equipment added here. Earth moving machinery was not import duty free of course. The result is that the basic machines conform, but the extras vary a bit. Look at the differences between Jeembawb's machine and mine, with the blade arrangements.
I'd suggest your filter, or possibly only a strainer, may well be located at the pump. Hydraulic filters are always on the return side which tends to narrow the options!

 

[Garrie Denny]

Thanks for the reply, im back down in brisvegas at the moment on commercial gas installatios so cant view my beast for a few weeks, but from memory i cant recall seing any connections at all o the sides of of the bottom rollers are the behind that side plate between the top and bottom of tracks ? thanks. Garrie.

 

[Garrie Denny]

From what i can remember there is no filtering system on the hydraulic line shown in my workshop manual for our girls. im not at home at the moment to check but there are many ad much more well iformed people that follow this thread that could put their finger on the right page for you ,just wait someone will come good, guaranteed/ (fortune favours those that wait,(Old 70CI saying).

 

[nutwood]

I'm in a bit of the same position Garrie. In reality my dozer's not a long walk away but it's an awfully muddy walk. I've included an image to show how things were going shortly before I walked away. Haven't seen it for a week but I'll get back there and take some images of the rollers as soon as I can see them again.
In the mean while I've included a couple of images of my oil gun and the relevant fitting. It's on the centre of the roller, facing outwards

 

[Garrie Denny]

Thanks for going to all the drama for your return poat firstly. I see that that attachment looks very much like the one i have on my grease gun that i use on the top roller (large button head grease nipple) oon the top roller, vi just need to tae the side protector plates off the tracks now to find the ends for the bottom rollers i assume to access these bottom rollers, gettinng close? thanks Garrie gIN-gIN.

 

[nutwood]

Hi Jeembawb. Was wondering how the clutch repair job was going. Haven't heard much recently, worried you've hit my problem, too much stuff to fix, too little time ?

 

[Garrie Denny]

I see the rollers on my machine have bolt heads in the centre of the roller,do these come out and you put the button head grease nipples in their place nutwood ?

 

[nutwood]

That'll be it Garrie. I still haven't been able to get you an image of my track rollers. They're down there somewhere!
I'm on a mission to build myself a souped up pressure cleaner. I've got a Cat pressure pump, an old fashioned 2hp motor that pulls about 14A, a lance and a length of hydraulic hose. If I can get all these components together, the days of going mining to find bits of the dozer will be over. I hired a serious petrol driven unit when I did the clutches and it made me realise how nice it was to have a clean machine. I do a fair bit of work in almost bogged situations; "let the tracks spin and it's all over" sort of ground. At this time of the year the lower half of my machine exists only in my memory!

 

[ianoz]

Hi Garrie ,If your rollers have a bolt type plug in them .They should be "sealed for life" oil filled ones .
"sealed for life" Means until the seals start leaking .

 

[Garrie Denny]

Hi ianoz,long time no talky, hope you and yours are well,thought you may have left these pages but obviously not thank-god. My bottom rollers do have what look to be 3/8, or larger end plugs in them, so assuming that they are for life bearings and not having had this machie since new and no knowledge whether oil has leaked out of any of them would you suggest removing these end plugs and see-ing if there any oil or lube in them ? Always thankfull for your opionions, Garrie-Gin-Gin.

 

[ianoz]

HI Garrie , Yes mate undo the plug see if there is any oil in them . Water level with the bung hole ,should be the level .Top up with gear oil . Then keep an eye on the track plates to see if any rollers are leaking down on to them .If they are leaking , I would back the track adjuster off ,Lift the machine to get the rollers clear of the track . And carefully check if there is any play in the rollers .. If there is wear in them ,I would replace the bungs with the Button head grease nipples, and run them till their stuffed .Most of the time rebuilding rollers is dearer than replacing with new rollers .. New ones would be between $300 and $400 each , So it is not cheap either .

 

[Garrie Denny]

Thanks as usual with the info Ian, ill do this when im back up home in the next few weeks,Garrie

 

[Jeembawb]

Back from Catland

Hi Jeembawb. Was wondering how the clutch repair job was going. Haven't heard much recently, worried you've hit my problem, too much stuff to fix, too little time ?

I'm back in Fiat land again - Actually Nutwood I have been too busy to scratch myself (those pullers etc will be back to you shortly) - I had a bit of a deadline to get some stuff done & instead of trying to fix my steering clutches up on a bushtrack, I got a bloke to come in with a D6D & do some of the hard yakka & drag my 70 down to some flat accessible land. So now my 70 is getting a birthday - steering clutches (courtesy Nutwood - cheers mate), head gasket & studs (have to gee myself up for that part but I learnt a few lessons last time, like let the penetrant penetrate - just wait for the studs to come loose cause its a whole lot easier than drilling & tapping & making inserts), & lastly a few of the grousers have bits missing so I am going to get a few (not sure maybe 10) 2nd hand grousers to tidy it up with (not sure yet what the go is whether they are just a bolt off job & if the bolts are special to fiat?).

Luckily for me the D6D operator got called away to another job pretty much after the 1st day or so & the owner was good enough to let me have a go with it - I clocked up over 60 hours with it in an a/c cab - man they are a good dozer - I am going to try to incorporate the blade/tilt control mechanism into my fiat instead of 2 peices of waterpipe for blade & tilt - I reckon if I had it like that I would not have toasted the steering clutches because I would have had more steering control in the blade while benching into a bank. I'm back from Cat land but I reckon I might still paint the old girl in Cat yellow?

Jimbob

 

[Jeembawb]

AD7 Steering Clutch Job - ready to commence

The poor old girl is back on flat land ready to get gutted & stitched back up ready for another days work - Just making a list & checking it twice.

1. Steering Clutches
2. Change ripper ram pos'n. (the ROP upright got bent a bit when the D6 was pushing me into pos'n - was fair crappin' marself sittin right in front of it).
3. A few replacement grousers.
4. Head gasket & studs.
5. Some different tilt control mechanism.
6. Cat yellow paint

 

[Jeembawb]

Can you identify this dozer

Hi Fergie.

I used to own a BT7D in North East Victoria many years ago. It has a later model, smaller, quieter, higher revving engine than the 70CI which I also owned as well. (I wonder if your BT7D is our old machine?)

We never had any problems with the motor, final drives or steering clutches in the BT7D but we did in the 70CI.
The BT7D as well as having a different motor, has a different final drive configuration. Instead of having the pinion from the steering clutches drive the bull gear directly, there is an intermediate reduction gear/layshaft assembly which is driven by the steering clutch pinion and then drives the bull gear. This spreads the wear and the load on the final drives and they lasted very well for us. I can't remember for sure but I think it may have had an oil filled main clutch too.

All in all it was a good machine. The 8 foot semi U blade held a lot of dirt and we had a good set of rippers on the back.
I think you can get a lot more info on these particular machines from GW Tractors as mentioned in this thread.

AusDave

I looked at this dozer a short while back when it was for sale as it looked quite similar to my 70ci / AD7's - It is said to be an AT7?? - It seems to have different motor & ripper arrangement - floor controls look similar. I am interested because it is also said to have had CAT steering clutch plates fitted (maybe D4 - and steel ones at that which would seem to make them a wet system??). I was wondering if it is a BTD7??

Interested to see what others think

Jimbob