Who had had them? What caused them?
The other day I was driving my 1990 K5 down a gravel road. I came to a stop sign, stopped, and then accelerated away. As I was getting up to speed a noise developed suddenly. I let out of the throttle, and turned the radio off to listen, and before I had a chance, my rear axle locked up. It brought me to a pretty quick, hard to control stop. I got out and looked things over. No obvious signs of breakage. I tried to drive it back and forth. Nothing, would kill the engine the second I let the clutch out. I locked in the front hubs, shifted the front axle into gear, and shifted the rear axle into neutral. I could move. Kind of. It drug the back tires pretty hard. So I called the buddy I was headed over to help. He picked me up, we went to his place and got the head off of his 3020. Then we went and borrowed another buddy's wrecker and towed it to his shop.
We dropped it off, and I let it sit there for a few days. Monday morning I went over and unbolted the axle flanges. Drove it into his shop and onto a hoist. Pulled the inspection cover on the 14 bolt. Looked good inside. Then I pulled the rear driveshaft. It wouldn't turn. The output of the transfer case was seized. I pulled the PTO cover off and looked inside. It looked fine inside. So I pulled the rear yoke, the rear seal housing, and when I tried to pull the speedometer housing off the back of the NP205, it was stuck. Took a couple pry bars, but I got the housing off. It brought the rear output shaft and gear with it.
I got the rear output shaft out of the speedometer housing (it took a big swing press). The smaller needle bearing that presses into the speedometer housing had disintegrated, and locked up the shaft. I ordered a new bearing, but then I found one locally. I took a different speedometer housing and output shaft from a "parts" NP205 I had. Installed the new bearing and put it back together. It is working fine.
Nothing else looked bad inside of the NP205. Is this a common failure? Has anyone else had problems with this? There was gear lube in the transfer case (it was very cold when this happened). The NP205 is part of a doubler, and it is clocked up 2". This means you can't put as much gear lube in it as you could if it was in the factory orientation.
I ordered a PTO cover from ORD with a fill plug. I was thinking about over filling the NP205 a little. Thoughts?
Martin
The other day I was driving my 1990 K5 down a gravel road. I came to a stop sign, stopped, and then accelerated away. As I was getting up to speed a noise developed suddenly. I let out of the throttle, and turned the radio off to listen, and before I had a chance, my rear axle locked up. It brought me to a pretty quick, hard to control stop. I got out and looked things over. No obvious signs of breakage. I tried to drive it back and forth. Nothing, would kill the engine the second I let the clutch out. I locked in the front hubs, shifted the front axle into gear, and shifted the rear axle into neutral. I could move. Kind of. It drug the back tires pretty hard. So I called the buddy I was headed over to help. He picked me up, we went to his place and got the head off of his 3020. Then we went and borrowed another buddy's wrecker and towed it to his shop.
We dropped it off, and I let it sit there for a few days. Monday morning I went over and unbolted the axle flanges. Drove it into his shop and onto a hoist. Pulled the inspection cover on the 14 bolt. Looked good inside. Then I pulled the rear driveshaft. It wouldn't turn. The output of the transfer case was seized. I pulled the PTO cover off and looked inside. It looked fine inside. So I pulled the rear yoke, the rear seal housing, and when I tried to pull the speedometer housing off the back of the NP205, it was stuck. Took a couple pry bars, but I got the housing off. It brought the rear output shaft and gear with it.
I got the rear output shaft out of the speedometer housing (it took a big swing press). The smaller needle bearing that presses into the speedometer housing had disintegrated, and locked up the shaft. I ordered a new bearing, but then I found one locally. I took a different speedometer housing and output shaft from a "parts" NP205 I had. Installed the new bearing and put it back together. It is working fine.
Nothing else looked bad inside of the NP205. Is this a common failure? Has anyone else had problems with this? There was gear lube in the transfer case (it was very cold when this happened). The NP205 is part of a doubler, and it is clocked up 2". This means you can't put as much gear lube in it as you could if it was in the factory orientation.
I ordered a PTO cover from ORD with a fill plug. I was thinking about over filling the NP205 a little. Thoughts?
Martin
