JASinIL2006
Vice Admiral
- Joined
- Feb 10, 2012
- Messages
- 5,724
Trying to get the boat ready for the summer. I have drained the gear lube and was pressure testing my A1G2 drive before refilling. Over the winter, I did nothing to it (except drain the lube) and it sat in my basement.
I pumped the drive to 10 psi and let it go about 10 minutes. I turned the drive shaft, prop shaft and shift rod, and noted no change. It held steady for 10 minutes.
Then I increased pressure to 15 psi and let it go about 15-20 minutes, again moving the shift rod, drive shaft and prop shaft. After about 20 minutes, I noticed it had dropped pressure about 1/2 psi. I let the pressure out, and retested at 15 psi, and now the pressure is dropping perceptibly; I can watch the dial and see it very slowly losing pressure (e.g., about 3.5 psi in 5 minutes).
I tested (with soapy water) the lower drain hole, the upper vent hole (where my tester is installed), and all the connections on the tester itself, with no bubbles showing. I tested around the top cover and the four screws that hold it on, and around the shift rod (where it sticks up out of the lower part of the drive). I also put some soapy water around the prop shaft, where it emerge from the drive and the thrust hub fits, No bubbling at any of these spots.
I'm not sure where else to check; I know there are other seals, but I'm not sure how to properly check to see if they're leaking.
Can anyone point me toward where to check any remaining seals? Am I right in thinking a seal is bad? Any idea why it held pressure for a while but now is leaking badly?
Thanks for your help!
jim
I pumped the drive to 10 psi and let it go about 10 minutes. I turned the drive shaft, prop shaft and shift rod, and noted no change. It held steady for 10 minutes.
Then I increased pressure to 15 psi and let it go about 15-20 minutes, again moving the shift rod, drive shaft and prop shaft. After about 20 minutes, I noticed it had dropped pressure about 1/2 psi. I let the pressure out, and retested at 15 psi, and now the pressure is dropping perceptibly; I can watch the dial and see it very slowly losing pressure (e.g., about 3.5 psi in 5 minutes).
I tested (with soapy water) the lower drain hole, the upper vent hole (where my tester is installed), and all the connections on the tester itself, with no bubbles showing. I tested around the top cover and the four screws that hold it on, and around the shift rod (where it sticks up out of the lower part of the drive). I also put some soapy water around the prop shaft, where it emerge from the drive and the thrust hub fits, No bubbling at any of these spots.
I'm not sure where else to check; I know there are other seals, but I'm not sure how to properly check to see if they're leaking.
Can anyone point me toward where to check any remaining seals? Am I right in thinking a seal is bad? Any idea why it held pressure for a while but now is leaking badly?
Thanks for your help!
jim
