JDcrawlers Messageboard

I got a chance to look at the steering pump this weekend. I had to take the alternator out and tilt the nose down for access. I got the cover off to access the pressure adjustment screw. I put an orifice in the pressure gauge and the pressure stopped jumping and settled in at about 200psi see prior ...

Thanks for the reply. I was hoping to get some more insight on the bouncing pressure in relation to the health of the pump. Is it worn out? Should I be thinking of a rebuild? I am going to put snubber on my gauge, reset everything, and see if there is any functional improvement.

450() crawler, built in 1968 I am trying to get the power steering working better. The brakes and steering still require a lot of force to activate What I have done so far: Put new seals in the slave cylinders Adjusted the brakes and clutches using the method in the factory manual. I put a pressure ...

Thanks for the help. I will probably just replace it with a hose. I spent the morning trying to find a local supplier who was willing to sell a piece of repair tube and some splice fittings. It shouldn't be this hard. My go-to hydraulics parts store shut down a few months back. The fracture involves...

Questions pertain to a 1968 450() with a Drott 4in1 front end. One of the hard hydraulic lines going to the clam shell on the 4in1 caught on something and fractured. These are 1/2" ID rigid metal lines. There appears to be a braze or solder repair near the fracture. I can probably salvage the fittin...

I remember getting generic specs for o-rings from the catalog. I guess they removed the generic cross reference it so they can sell JD brand washers for $5 or $10 each plus $5 for shipping. You said that you were looking at a drawing that showed the T12952 and it looked like it's about 1/2 in thick....

The method says that the aft two bolt locations get one spacer/shim each. The manual says for the front two bolt locations ".......as many as will fit". If the thickness of the shim is know, it sets the stand off distance at the aft bolt. You can futz around to set the front shim thickness like the ...

Installation of the power steering mounting brackets on a 450() calls for shimming the mounting bracket on installation. The book procedure would install at least one shim at each of the 4 locations. That will get the mounting bracket to stand off the top of the transmission. If I read the Deere par...

Jim You confirmed what I was thinking with the divider. It may have been a band-aid to compensate for an undersized power steering pump. I guess it works so I can't complain. Thanks for pointing out the location of the shuttle valve in the parts manual. That got past me. It doesn't show any replacea...

I found some service information in a revised shop manual for the 450(). I have a little better idea what is going on but still have questions. I am hoping to get most of the parts I need before taking things apart. Questions: There is a flow divider which feeds oil from the pump to active steering ...

Simple stuff first. Have you cleaned up all the wiring from the batteries to the starter? I suspect you have tried this already. You probably want to do that before installing a new starter anyway.

The power steering on one side of crawler is not working. It will still steer and brake but it takes a lot of force and a lot of stick travel. The clutch release and the brakes are all adjusted per the shop manual. Before I pull the unit has anyone else had the problem and found a fix. I am not real...

I need some help bleeding the ripper hydraulic cylinders. The ripper does not have much push down force when the cylinders are almost fully extended. It worked well the last time it was used. No leaks anywhere. It has a 4in1 bucket and all that works fine. Specifics: It is 450 no suffix The clamshel...

Deere parts list is now specifying a JD7828 fitting which is a button head grease fitting. I don't want another grease gun for buttonheads. I will try a Alemite or a Lincoln. The no-name fittings may be good for u-joints or ball joints but it looks like I need something that seals a lot better. Than...

The track tension adjustment ram is leaking grease out of the zerk center fill hole. It is amazing how little grease they have to leak to let the track get too slack. Tried a couple of different ones (from the same batch) and they all leak. Does anyone know of a good, reliable brand that will hold g...