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Author Topic: Hi everybody.  (Read 2879 times)

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Hi everybody.
« on: February 01, 2014, 09:15:16 pm »
Just thought id say hello and sign up to the forum. I have a 1963 u900 406 that I use weekly for tree work. I bought it from Vos in Oct last yr and I love it to bits!! Its great some times I drive it more than my pickup just because I can :)
Its a full Ag spec model and ive added a rather large chipbox to the rear bed and it is also fitted with Vos's own winch bumper with 5t hydraulic winch. My plans for the future are to fit front linkage and pto reverser. Also I would like some more grunt and have looked into having the pump recalibrated with the larger plungers. I've spoken to vos about a turbo conversion for the u900 but its still developmental and as such cost quite a bit. If anyone has any info on tuning it would be welcomed.
Cheers people :)
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Re: Hi everybody.
« Reply #1 on: February 02, 2014, 09:35:49 am »
Hi mr mog. Welcome to the forum.

Sounds like you've got a nice little setup there. As a side note, there is a chipper on ebay at the moment complete with a mog reversing box - could be worth a look. I think they look great with a front mounted chipper running into a chip box!

Tuning wise it seems like this is quite a delicate affair. I'd like to do mine too but I'm not sure if there is anyone local who can take it on. I don't want to melt anything, and it sounds like that is quite easily done if the job isn't done correctly!

Edit... We need pictures! :D
« Last Edit: February 02, 2014, 10:01:41 am by njc110381 »
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Re: Hi everybody.
« Reply #2 on: February 02, 2014, 10:25:00 am »
 Yeah i've seen that but its the same as what I already have minus the reverser box. Its under a ton but still makes the mog sit down an inch or two. Most mog owners that run front mounts say the u900 is a bit light to run 8"+ chippers up front. On the tuning front my mog had about 85ish HP when new and from what I can gather 120hp is a factory spec for this engine. Also the om352 was turbocharged to 150-160hp from the factor too and im not talking om352a with oil squirters either. It is a low comp lazy plodder of an engine so I would of thought you would have to get something propper wrong to melt one! There is a place near preston called merlin that recon and tune pumps for vos and price and can get you to 120hp no problems. My issue is I cant afford to have it off the road for a couple of weeks. But could maybe manage it for a turbo :)
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Re: Hi everybody.
« Reply #3 on: February 02, 2014, 10:44:21 am »
I was tempted to ask if the guy would sell the reverser as a separate item, but in truth I don't have the money to throw at it.

You've got to ask yourself why the 352a exists if it doesn't need to? The engine may well be capable of taking 160hp with a turbo but how does it like it long term? My thoughts on this come from when Land Rover put a turbo on their n/a diesel engine... What a mess that turned out to be for reliability! I'm not really the person to offer anything more than an opinion on it in truth, but it does seem to me that problems can arise when they are tuned up badly.

We need Brian or moose on this one. They've probably touched more mogs than you and I have seen pictures of them! :D
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Re: Hi everybody.
« Reply #4 on: February 02, 2014, 11:05:18 am »
Aye I know what your saying and I think that is why square cabs are often looked at as expensive to run. They more power you have the more you tow and the faster you go. Its stands to reason that things are going to break or wear out quicker. I would be happy with 150hp which I would like to think would be achievable with a low pressure turbo setup. More to take advantage of the lower torque curve than out and out power.
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Re: Hi everybody.
« Reply #5 on: February 02, 2014, 03:05:04 pm »
the u1100, 1300 and the "freightliner military tractor" (the 419) came with 130 bhp from the factory. tuning an om352 up to 130hp is in fact incredibly simple, i am not willing though to post the info up online, because if somebody does it wrong it costs a lot of money to repair.
the om352 certainly has been turbo'd to 150bhp without causing an issue, but when you think that you can get 130 naturally aspirated, is it really worth it for that extra 20 bhp? if your going to do it, you might as well do it properly and invest the time and money in piston coolers etc... theres also the fact that mercedes then brought the 352A out with piston coolers (not all of the 352A's had piston coolers), there must have been a reason, even if it was just to prolong the life of the engine.

a prime engine that was turbo'd from the factory without coolers was the om312A, the predecessor to the om352, indirect injection the om312  was ideal for a turbo because it had a very low compression ratio. you can find the 312 on the back of 411 snow cutters, with an incredibly big turbo on the top of the head (because turbos were so inefficient back then). it only produced 115 ponies though.

there was also an m352,, which produced 130 bhp, it ran off petrol, so i wouldnt really want the fuel bill...
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Re: Hi everybody.
« Reply #6 on: February 02, 2014, 07:49:17 pm »
Hi Mr mog, nice to have another mog mad person on board!
I have a U1000 at present but used to have a U900 with a Gandini 9" chipper on the back that I had the pump recalibrated by Ken Day Unimogs, it never gave any trouble and the extra power was great towing a timber trailer in the cotswolds.
I used to work with a Gloucester tree surgeon who front mounted a chipper on a u900 and had problems with the rear wheels lifting when braking hard :o
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Re: Hi everybody.
« Reply #7 on: February 04, 2014, 06:57:16 pm »
welcome Mr mog... sorry for being so late with my welcome  :-*

sounds like the same sort of rig im after in the end but its taking me rather a long time to do it  :D i wouldnt bother with a turbo as a fuel pump tweak is powerful enough on a u900 imo and then you have to cut into the engine cover to fit the turbo in. mine runs a 6" turntable on the rear and shes not tuned but shes happy enough with it. i have thought about front mounted but unless you have good weigh over the rear axle you will be doing endos all day!  ::)

I used to driven a u900 for a lad with a 9inch front mounted chipper and that was tuned to 110hp which ran lovely. only slight problem was the chipper was so big and heavy it needed the crane on the back to balance it! once went over a speed hump (one of those stupid shear cliff ones) at about 10-15mph and nearly hit my haed on the roof and bottomed the chipper out!  :o

cheers Casto
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Re: Hi everybody.
« Reply #8 on: February 07, 2014, 08:18:37 pm »
Great info guys! In regards to the front mount im looking at a greenmech tmp150 which is side mounted. Think this might keep the weight closer to the front axel.it also only weighs 490kg which fairly feather weight really. I did a bit of towing today with a 8t Dump trailer and it sits at 55k  quite happily itsjust getting there lol
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Re: Hi everybody.
« Reply #9 on: February 07, 2014, 09:23:47 pm »
Dont go to mad with the dump trailer :o
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Re: Hi everybody.
« Reply #10 on: February 07, 2014, 11:30:37 pm »
Haha! I love that picture. There's only one way out of that... Lock the diffs and pull like hell!
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Re: Hi everybody.
« Reply #11 on: May 12, 2014, 09:16:53 pm »
Mr Mog
if your running on 88ish horses and your engine is fit with say less than 4000 hrs I would recommend fuelling her up, AC Price now has a PTO Dino it truly is the only way! You will love the difference. Check if you still have the lead seals on the plate at the back of your pump, if there still there and it's never been messed about with.
 If yours is a 1963 it's could be one of the first u900s but the earlier mogs came with the OM312 an indirect version of the OM 352 not good for tunning  but in fifty years it's probably had a heart transplant by now.
Moose
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