V1702 injector pump timing

[jp8775]

I am assembling a rebuilt V1702. I have seen that the timing should be 25 degrees BTDC On my pully there are marks for 14 FI degrees and 31 FI degrees no 25? I had the old pump rebuilt so I should be able to just put the old shims in, but I would like to check it? It is a 743 B has any one heard of 31 BTDC?.

 

[Tazza]

From memory it is 15/18 BTDC.

If you still have the markings and pointer on the front pulley, work with those markings.

I don't do the actual rebuilds in our workshop to have exact details.

Removing the pump after the rebuild isn't hard, i'd put it in with the shims and you should be right.

 

[jp8775]

Thanks, I have spent some time with a Bobcat mechanic. He said that he always uses a home made degree wheel. I so did as well. I found that the 31FI mark is actually 25 degrees BTDC. He said that they usually listen and look at the smoke. If it is too far advanced it will smoke. If it is to late it will be to lean and will run rough and hesitate when you advance the throttle. They adjust accordingly. But I am not paid by the hour so I will try to hit it right the first time. If I have to I will make changes but that does involve a lot of disassemble and reassemble. If there is a thread that I missed that already covers timing I would like to know. I was unable to find one in my search.

 

[jp8775]

I am going to run this on a test stand I made from a small pallet. I have seen it done many times on the internet seems smarter to do especially if there is a leak or something. I have a radiator from another project. I have 4 more engines to go through so it will get used. I will post a video on this link when I get it running.

 

[jp8775]

Every 743 I have listened to at idle has a little pinging sound. Small but there. Possibilities timing or poor quality fuel. And of course bad injectors. Any body really got this to go away?

 

[Tazza]

Never heard said ping, ours always seem to purr after a rebuild