Pinch bolt torque

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   From a pcm manual the trunnion mount pinch bolt torque is 45 ft pnds.

I'm not a mechanic, everything has a torque value and i'll torque it in sequence/pattern over 3-4 passes or as suggested in a manual as long as some college boy didn't design it so a torque wrench doesn't fit.

So i strarted by bottoming out the nuts with a box wrench, then torque at 15 ft pounds
Next pass i didn't like how it felt so i loosened and restarted at 15 and went around in 5 pound incriments real slow.
They all got to 30 ft pnd but i don't know if that's sufficient. The engine moves easily on the trunnions so i could see those need to be secure.

If one breaks the mount has to come off so i was reluctant and the half moon shape makes me think they're in there stretching as torque is applied.

I did the torque and mount lock bolts last week as part of the alignment 

Can i go to 45 foot pounds on those.

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wayoutthere Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: February-28-2020 Location: Florida Status: Offline Points: 461	Post Options Post Reply Quote wayoutthere Report Post Thanks(0) Quote Reply Topic: Pinch bolt torque Posted: September-27-2021 at 7:55pm
	From a pcm manual the trunnion mount pinch bolt torque is 45 ft pnds. I'm not a mechanic, everything has a torque value and i'll torque it in sequence/pattern over 3-4 passes or as suggested in a manual as long as some college boy didn't design it so a torque wrench doesn't fit. So i strarted by bottoming out the nuts with a box wrench, then torque at 15 ft pounds Next pass i didn't like how it felt so i loosened and restarted at 15 and went around in 5 pound incriments real slow. They all got to 30 ft pnd but i don't know if that's sufficient. The engine moves easily on the trunnions so i could see those need to be secure. If one breaks the mount has to come off so i was reluctant and the half moon shape makes me think they're in there stretching as torque is applied. I did the torque and mount lock bolts last week as part of the alignment Can i go to 45 foot pounds on those.

wayoutthere Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: February-28-2020 Location: Florida Status: Offline Points: 461	Post Options Post Reply Quote wayoutthere Report Post Thanks(0) Quote Reply Posted: September-27-2021 at 7:57pm


TRBenj Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21183	Post Options Post Reply Quote TRBenj Report Post Thanks(0) Quote Reply Posted: September-28-2021 at 8:08am
	That’s a 7/16” fastener IIRC so 45 lb-ft is in family for a normal fastener. Should be fine to tighten them up.

wayoutthere Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: February-28-2020 Location: Florida Status: Offline Points: 461	Post Options Post Reply Quote wayoutthere Report Post Thanks(0) Quote Reply Posted: September-28-2021 at 3:58pm
	Thank you, i'll run them up to 45 when i put in the shaft and rudder.

Pinch bolt torque

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