The Fordson Tractor Pages Forum

Well the pump Should be ok then,how About the the valve that dumps the lift perssure when you select "down"?
Could it be sticking. It Should move easy and yet seals properley in bore

As Henk says,it is more easy to measure pressure at the cover (and safer) but if the pressure is low-how do you know if the problem is in the pump or in liftsystem?

hi I think you need to run a test of the pump itself "in tractor",ram and cover off,then fit an outlet pipe to the pump itself with handoperated "strangle-valve"+your preassure gauge.This should give you a realistic picture of the pumps capacity and perhaps remove some unknowns from the equation :D ...

Are we certain it is bar and not psi?
1bar=14.6psi

If PRV is open How can he measure 150 Bar? with that much pressure the hydraulicks would be labouring audibly i think

Was the tractor lifting Something when you measured 150 bar? Otherwise I dont See how it can build such pressere,are you sure the lift isent jammed somehow.

Model? Year?

Yes , by endbearing I mean the machined surface around the hole where the lower rotor-shaft should go looks erroded(in my opinion)Sorry about the arrow,no can do .You might be able to check the clearance with a straight-edge.

Hi there,
Looking at the foto "nasty grooves" and at the area around the hole where the lower rotorshaft goes,it looks to me that a considrable wear has taken place increasing the "end clearance" of the rotor.I think that is where you are loosing pressure.
Kind Regard
svend.

Hi there, Congrats with the "new" familie member and wecome aboard! I had the same problem with my super,turned out to be down to several controlarm links inside the lift-cover having seized solid with rust.So in my opinion it is off with the lift and get it upside-down on the workbench(2 man job) a...

If you want to give it some extra lube,you can unbolt the drainpipe banjo bolt and squirt som sae 30 oil into the pump housing.Remember to clean and lube the small filter on the pump.
Ticking sound could be from the injection pump drive,thats the "major sound ".

Vacume pump is lubricated by the diesel that leaks from the pump elements,and does not require further attension besides cleaning of the little air cleaner under the little round cover bolted on top of the pump rack.
I add a little ATF in the diesel ,I Think it is good for the injection system

Owners manuel says re torque with warm engine .

Vacume or mechical governer?

You could check to See if lube oil is rreaching the rockers when you start up again,if it does then the seive Should be ok.
But still if you want to do the oil seals then the sump must be off.

Yes the vacum job seems to be in good shape and is probably what saved the day, and good fun getting the nessary bits together to make it tic!

If my near -miss could help prevent you or someone else getting hurt that would be great

since I startet the thread, i have done the following to the engine:- - changed the injectors,got a used set from another super which seemed to help the "harsh " running but not the smoke and "lumpy" starting. -converted to vacume governor and put it to work mowing the meadows,several days of work! ...

Not trying to be a wise guy but i think the effect of 0.2 mm would matter only if you took it off the Block (deck) and so bring the piston crowns closer to the head.

Goodeeeevening,
Had a similar problem with the super major i bought recentley, turned out to be due to links inside the hydraulic cover having seized in rust!!!

See page 2
FMD lnjector problems.why is it "dead"

Hello all thanks for your comments,the accident was entirley my fault for not making sure the tractor was in neutral and to make things worse the throttle was fully on and the engine warm. the shed were the major is parked is devided by a wooden wall,on the other side we keep some goats (ecological)...

Thanks Jim,
Well a quick change of undies and I was ready to go again!

hello all! I am so glad to be writing this! After i finished som topping i drove the vac-major into its shed and did a quick re-torque of its head,having completed the job i started it up just to hear it purr.Only trouble was it was parked in 4th gear and i was standing on the dirt floor next to it!...

the thrust bearings look fine to me.Lots of assembly lube and there must be no binding at all when when you spin the crank by hand after you torque the bearings.any binding and you stop and find out what is wrong.And you will end up with a good running engine.