Jinma 284 wiring problem

I have the same tractor / engine combination. That is a manifold pre heater. It is designed to spray fuel into the manifold and heat/ignite it while the glow plug circuit is energized. (I don’t know if mine works or not but left it hooked up). What I did do was take the wire from the key switch going to the glow plugs and run it to the signal post on a solenoid, and running full battery power to the glow plugs through a circuit breaker, then through the solenoid. That gives the glow plugs full power which the factory setup cannot provide, as well as saves the key switch from premature failure due to excess current running through it.

I can’t answer either question. I bought it in a crate from Keno 8+ years ago and didn’t spend much time under the dash. As to why this was disconnected, I’ve seen enough backyard engineering done on tractors by challenged individuals to last a lifetime. :wacko:

I have a quanchi engine a 495 I think. it has neither a glow plugs or manifold heater it starts at 20 degrees no problem. but that is not your engine. maybe it was disconnected because somebody did not know what it is or seen that it was creating a big draw on the battery and alt. and thought it was bad. I kinda find it curious that it has both unless the relay puts fuel in the system then the glow plugs light it off ,but then why would it need to be rated a 90 amps ? do you think maybe the relay heater kinda preheats the fuel for the glow plugs. I will be watching this post.

I’m interested in what size wires are plugged into this 90 amp relay, I’m guessing 18 gauge :negative:  I think it’s time I put a meter on this thing and find out what it’s drawing and if it’s even doing anything :scratch:  I’ve seen the larger engines start easier in cold weather with most brands, better engineering, more compression, or better thermal dynamics with a larger mass? My little engine needs the glow plugs to start at 20 unless I’ve had the block heater plugged in, that much I know .

It may be this upcoming weekend before I have a chance to look at it, But I’ll try and get you the locations of your unplugged wires so you can at least hook the relay back up.

The type of engine has a lot to do with how it starts in colder weather. This is even true of older vs. newer Caterpillar engines. The Indirect Injection (IDI) engines are notoriously cold blooded, and need all the help they can get in extremely cold conditions, whereas the Direct Injection (DI) need very little, if any, help at all. Quanchi may have different combustion chamber configurations for different model engines.

Here is info on the flame start system by Borg Warner (same principle).

http://emissions.borgwarner.com/products/diesel-cold-start-technology/cold-start-aids-for-commercial-vehicles