EGCfarms

Figured out the adaptor for the compression check.... 210psi on cylinder 1 and cylinders 2 and 3 were both less than 50psi..... its a bit relieving to find the issue, but now hoping that it is stuck rings. Filled all 3 cylinders with atf and acetone to try and free them up. Making hay and camping this week so it will have plenty of time to soak before we can drain and try again.

I did check the stop cable and even tried changing the throttle position and stop cable position while cranking and no audible changes other than the stop cable shutting off fuel. I have confirmed the timing, fuel, and air side of things to the best of my knowledge. I am down to compression. I have a compression test kit, but none of my adaptors fit. My plan is to pull an injector and make something custom.

I went back to check the timing. It was set at 20 degrees advanced, so I adjusted it to 12 degrees but no change. I pulled the intake boot off to make sure it was clear and it has a bunch of suction while cranking. Gave it a shot of ether again and there is almost no change with ether other than a slight knock. If it was fuel related I would think it would fire on the ether. So low compression? Could the rings be stuck?

Thanks for responding. Long time reader, but first time really needing to post. -I haven't put a feeler gauge on the valves, but they don't feel excessively loose. - Definitely will check the shutoff cable. That will be extremely frustrating if that is what I have been missing this entire time. - Timing is my biggest question on this thing. The scribe line and pointer don't line up, but it is back in the same place from when I pulled the pump (Bosch VA). If that is the problem, then it moved or slipped out of time when running it last somehow. The manual I have been reading mentioned there should be a second scribe line labelled with an "L", but there is no such line and there also doesn't seem to be any timing marks on the gear that I can see. It made it very confusing to put back together when i got the pump back even though I marked the gears before pulling it apart. The manual gave a method for checking time with a dial indicator, so I am working on getting something rigged up to try that. This thing is a real pain to rollover with the hydraulic pump coming off the crank pulley.

I have a 500c dozer with the D155 engine that won't start. It was sitting in my barn for some months over winter and then wouldn't start. (It ran and started like a top when we parked it there) It cranks and acts like it wants to start with some smoke out the exhaust, but won't take off. I have tried ether, replaced fuel filters, new injectors, sent the injection pump off for a rebuild (they said they didn't find anything wrong with it) and I am in the same condition. The engine does seem to "knock" a little when using ether, but doesn't seem to really fire. I don't have the right adaptor to check compression with a gauge, but it sent an injector across the shop while cranking when it wasn't bolted down. There also doesn't seem to be blowby coming out of the oil fill while cranking. We have confirmed that fuel is getting all the way up to the injector and it smokes grey/black while cranking, so it seems like it is getting some sort of fuel. Am I missing anything before we tear into the engine deeper? Would it be a terrible idea to advance the timing on the pump a bit and give it a try? I also thought about disconnecting the fuel return and trying it with the return in a bucket, but I am just grasping at straws here. Any help would be appreciated.