Are You having to add fluid. Are You using the correct oil. Should be the same as You use in the engine; NOT Hydraulic fluid!!! Although some people use it.
25 years ago I went see a 620 at a dealer. Very nice looking but hydraulics were not working the salesperson thought the arms were stuck. He got a breaker bar & almost lifted the front off the ground. I went over & with one hand lifted the arms. He didn't realize they were already down. Then he checked the fluid level. It didn't measure on the stick so he went for a 5 gallon pail. Poured almost all of it in when I told him the Power Troll only held about 12 quarts. The look on his face is still in my memory. He took his hat off wiped of the sweat, & said I guess there an internal split in the S.O.B. They tore it apart, & that's what it was. Price went from $2800 to $5000 fixed when 620's were around $3000 for a descent looking machine. At that moment on the phone I said good luck; but I am sorry I cant justify the money. I didn't trust them fixing it; when they couldn't even diagnose it without my help!
If no one else can help try "MR. THINKER" of "Green Magazine". He's a marvel of these things!!!
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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