fld120 steering problem ! pls someone help me !

It has to be one of three things. Sounds like the caster has been eliminated. I like what HeavyD says ^^^

I'd say it's safe to say you have some restriction.

The hot gear box ought to be your clue though. Are you positive the gear to reservoir and the pump bypass hoses are returning fluid? It might be dead pumping causing the gear box to heat up.

Look on the bottom of the reservoir. There should be one big line (pump feed) and two little return lines. With the engine running break each little line open barely and the fluid should squirt out. If it barely dribbles from reservoir drainage, then you have gear box problems with your fluid circulation.

The center line is your return and the little outside line is the bypass.

 

No, the faster you rev, the more that goes to the bypass. It's designed to run 100% at idle.

I found this maintenance manual. I don't know if it will help you. It gives you a few things to look for and lubrication points.

Section 32, 33 and 46 is on the front end and steering.

http://www.freightlinertrucks.com/C...glish/heavyduty_trucks_maintenance_manual.pdf

 

$1000 bucks, I'll give you 500 things to look at. One of them has to be right!

 

At this point, the way I see it, as long as the steering gear input shaft rotates freely and since sector shaft adjustment made no change, the only thing remaining is that the sector shaft is bound up in the gearbox. I would return the gearbox for a full refund and find a different supplier. You might locate your local distributor for a Power steering specialists reman out of Westerville Ohio, Their gearboxes have been flawless.

 

I agree, especially if it's a reman. Lemons get tossed through all the time. New employee, lunch time, shift change ....

 

Oh man, I would love to see this problem in person! I love a good mystery!

 

There's your problem...BiNGO! Get a good gearbox on it and be done with this ordeal!