MarlinSlayer
Bronze Member
First I want to say this is an awesome forum and I really have a good handle on the care and MX and repair of the old NAA....the only thing I didn't do myself was the lift cover because I ran out of time (More on that later)
To sum up...I have way more in this thing than it's worth, but I know it will run for a long, long time without too much major mx (I hope).
To sum up all the repairs: replaced gas tank, radiator(three times...more on that later), installed shroud, did a screw on conversion, replaced rotor(twice) plugs, wires, condenser (twice), points (twice).
Replaced every gasket/filter element on outside of tractor, and valve cover gasket, adjusted valves, replaced oil pick up tube gasket.
Rechecked timing. new solenoid, rebuilt starter.....days and days of cleaning. removed broken stud on axle support bracket.
Reinforced axle support bracket where some rust had formed and drilled drain holes in bottom to avoid collecting so much water.
Replaced front axle, axle pin and bushing. Replaced front spindles, bearings and bushings (had front bushings inline reamed). Replaced dustcover boots on all the steering linkages, greased and adjusted all linkages.
Adjusted clutch pedal, rear end brake job (More on that later)....fixed a water leak in the water Jacket and used a product to ceramic line the inside of the water jacket. Checked compression (Really, really good)
Completely rewired tractor.
New rear rims and tubes.
Removed hood tins, welded up some cracks, took out some dents, then ground down the flanges a little where the spot welds had broken and someone tried to screw them together and ran a weld bead down the flanges. the left lower hole where the bottom bolt goes on was completely cabbage and just kind of sat on the bolt with the upper semicircle still intact. I took a big fender washer and welded that to the back of the semi-circle and it worked like a champ. No more rattling.
This is my first try at welding and with a friends mig welder, it was easy.
Rebuilt carb (Three times)....adjusted governor linkage.
I had difficulty tuning carb. In another post I found out what the problem was and I will repeat it here: Mine would run great...then it would be all over the place. I had completely rewired it and thought I had screwed something up. Put in a new coil and condenser....you know what? When I originally took off the distributor....it was in the dark. I had forgotten that I felt a piece go flying...but wasn't sure cause it was in the dark. I figured the new rotor would have everything I needed. Anyway, I rebuild carb three times, tried to enrich/lean as according to procedure, but I couldn't get it to run consistently especially with throttle changes.....went to buy another condenser and points, talked to the local tractor guy about my problem....also had weird brass shavings sitting on dust cover...(Soundguy probably already knows what the problem is). The shavings bewildered him, I told him the rotor seemed "Awfully loose and had a lot of play in it" but he said "you did put the rotor block back on?" I said "the what"....he reaches into a bin and hands me a 2cent clip. Told me that was the problem and to go in peace. Sure enough, there was no block underneath...and by this time the new rotor had cracked and had worn down the contacts on the new diet cap I had put on. Replaced rotor (with block) cap and she purred like a kitten once I tuned the carb. Geez that was a lot of work for a 2 cent part.
Radiator: I ordered a radiator from a reliable source but got the cheapest one as I figured I'd put a stick through it shortly. Once installed, I noticed a small (nickel sized) collection of green fluid at the bottom around some of the fins. Hoping against hope that I had somehow spilled fluid..that it somehow hadn't evaporated, and it found it's way there I cleaned it up and went on a trip out of town. When I came back, the puddle had re-appeared this time quarter size. SHOOT....I need to bushhog farm before deer season. Hadn't been cut in a year! Got on the phone and the supplier was more than willing to replace it and said that they get about 10% of them back. New one should be ok. Installed new one and took my awesome almost new tractor to the farm.
Bushhogged for two hours and then lift wouldn't work.....dang...when putting it up on the trailer, driving across farm, I go over a bump and radiator 2nd new radiator lets go. Turns out these after market radiators have the radiator outlet extending too far aft. Since I had replaced the axle, thought maybe I had done something wrong. With the axle on the innermost adjustment, when you articulate the axle, it makes contact with the radiator outlet and breaks the weld. A quick search on yesterdays tractors confirmed my suspicion and my already proposed solution. I told a grinder to the part of the axle arm that is unused and extends in the way of the radiator outlet and ground off a portion to allow the axle to articulate. Had to jack up tractor to test it. Now I have a worst case 1/4 inch clearance at full throw. Kind of like taking off a piece of your belt that goes too far around your waist. I still have enough structure that I can extend the axles all the way out, but I'm likely never to do that. I have gotten really good at pulling tins and replacing radiators now. Third time was a charm. Took tract to the shop and they fixed the llft cover cheap....
Brakes....The brakes had been replaced but not adjusted and the seals looked like they had been replaced, but whoever did that forgot to adjust brakes, Cleaned them up, adjusted them....good thing I did, because I tried to roll the tractor into a ravine that was covered in grass. Stopped with just the right front, and two rears on 1 foot of good ground each. Rest of tractor was suspended in mid air with me holding on for dear life afraid to step on clutch and reverse it. Tractor stalled when I dropped bush to help anchor me in the emergency stop. Got a four wheeler and chain to make sure I didn't roll forward when I started it up and was able to reverse it. I am thankful that I had the previous problem with the radiator, because with the tractor hanging off the right front wheel, there's no way the radiator would have survived if I hadn't relived the impact point on the axle.
Anyway, more later, I have to go pick up daughter.
Pic follows:
[URL=http://s998.photobucket.com/user/wtss1/media/IMAG0183%202_zpsqyq6thas.jpg.html]
[/URL]
To sum up...I have way more in this thing than it's worth, but I know it will run for a long, long time without too much major mx (I hope).
To sum up all the repairs: replaced gas tank, radiator(three times...more on that later), installed shroud, did a screw on conversion, replaced rotor(twice) plugs, wires, condenser (twice), points (twice).
Replaced every gasket/filter element on outside of tractor, and valve cover gasket, adjusted valves, replaced oil pick up tube gasket.
Rechecked timing. new solenoid, rebuilt starter.....days and days of cleaning. removed broken stud on axle support bracket.
Reinforced axle support bracket where some rust had formed and drilled drain holes in bottom to avoid collecting so much water.
Replaced front axle, axle pin and bushing. Replaced front spindles, bearings and bushings (had front bushings inline reamed). Replaced dustcover boots on all the steering linkages, greased and adjusted all linkages.
Adjusted clutch pedal, rear end brake job (More on that later)....fixed a water leak in the water Jacket and used a product to ceramic line the inside of the water jacket. Checked compression (Really, really good)
Completely rewired tractor.
New rear rims and tubes.
Removed hood tins, welded up some cracks, took out some dents, then ground down the flanges a little where the spot welds had broken and someone tried to screw them together and ran a weld bead down the flanges. the left lower hole where the bottom bolt goes on was completely cabbage and just kind of sat on the bolt with the upper semicircle still intact. I took a big fender washer and welded that to the back of the semi-circle and it worked like a champ. No more rattling.
This is my first try at welding and with a friends mig welder, it was easy.
Rebuilt carb (Three times)....adjusted governor linkage.
I had difficulty tuning carb. In another post I found out what the problem was and I will repeat it here: Mine would run great...then it would be all over the place. I had completely rewired it and thought I had screwed something up. Put in a new coil and condenser....you know what? When I originally took off the distributor....it was in the dark. I had forgotten that I felt a piece go flying...but wasn't sure cause it was in the dark. I figured the new rotor would have everything I needed. Anyway, I rebuild carb three times, tried to enrich/lean as according to procedure, but I couldn't get it to run consistently especially with throttle changes.....went to buy another condenser and points, talked to the local tractor guy about my problem....also had weird brass shavings sitting on dust cover...(Soundguy probably already knows what the problem is). The shavings bewildered him, I told him the rotor seemed "Awfully loose and had a lot of play in it" but he said "you did put the rotor block back on?" I said "the what"....he reaches into a bin and hands me a 2cent clip. Told me that was the problem and to go in peace. Sure enough, there was no block underneath...and by this time the new rotor had cracked and had worn down the contacts on the new diet cap I had put on. Replaced rotor (with block) cap and she purred like a kitten once I tuned the carb. Geez that was a lot of work for a 2 cent part.
Radiator: I ordered a radiator from a reliable source but got the cheapest one as I figured I'd put a stick through it shortly. Once installed, I noticed a small (nickel sized) collection of green fluid at the bottom around some of the fins. Hoping against hope that I had somehow spilled fluid..that it somehow hadn't evaporated, and it found it's way there I cleaned it up and went on a trip out of town. When I came back, the puddle had re-appeared this time quarter size. SHOOT....I need to bushhog farm before deer season. Hadn't been cut in a year! Got on the phone and the supplier was more than willing to replace it and said that they get about 10% of them back. New one should be ok. Installed new one and took my awesome almost new tractor to the farm.
Bushhogged for two hours and then lift wouldn't work.....dang...when putting it up on the trailer, driving across farm, I go over a bump and radiator 2nd new radiator lets go. Turns out these after market radiators have the radiator outlet extending too far aft. Since I had replaced the axle, thought maybe I had done something wrong. With the axle on the innermost adjustment, when you articulate the axle, it makes contact with the radiator outlet and breaks the weld. A quick search on yesterdays tractors confirmed my suspicion and my already proposed solution. I told a grinder to the part of the axle arm that is unused and extends in the way of the radiator outlet and ground off a portion to allow the axle to articulate. Had to jack up tractor to test it. Now I have a worst case 1/4 inch clearance at full throw. Kind of like taking off a piece of your belt that goes too far around your waist. I still have enough structure that I can extend the axles all the way out, but I'm likely never to do that. I have gotten really good at pulling tins and replacing radiators now. Third time was a charm. Took tract to the shop and they fixed the llft cover cheap....
Brakes....The brakes had been replaced but not adjusted and the seals looked like they had been replaced, but whoever did that forgot to adjust brakes, Cleaned them up, adjusted them....good thing I did, because I tried to roll the tractor into a ravine that was covered in grass. Stopped with just the right front, and two rears on 1 foot of good ground each. Rest of tractor was suspended in mid air with me holding on for dear life afraid to step on clutch and reverse it. Tractor stalled when I dropped bush to help anchor me in the emergency stop. Got a four wheeler and chain to make sure I didn't roll forward when I started it up and was able to reverse it. I am thankful that I had the previous problem with the radiator, because with the tractor hanging off the right front wheel, there's no way the radiator would have survived if I hadn't relived the impact point on the axle.
Anyway, more later, I have to go pick up daughter.
Pic follows:
[URL=http://s998.photobucket.com/user/wtss1/media/IMAG0183%202_zpsqyq6thas.jpg.html]
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