Jinma Fuel Bowl Up-Grade

bjr · Oct 8, 2010

The fuel shutoff was the first thing I changed on my JM-354. I thought the orifices were way too small on the original equipment valve and it got replaced with a 1/4" needle valve and no stainer. I'm careful to keep clean fuel and the spin on filter should trapped any thing that would hurt the injector pump. Glad to see you guys addressing the issue. bjr

Rich Waugh · Oct 9, 2010

Gauthier said, "Many don't know there is a right direction and a wrong direction,,when winding teflon tape on threads."

Very true. And most people forget to leave the first two threads clear, too. As I said, use it *right* and it works a treat. Wind it backwards or start at the very beginning of the threads (or worse, overhang the end) and you're almost certain to extrude bits of teflon into the flow path. I've used Teflon tape on literally thousands of joints for fluids and gases both, and the only problems I've ever encountered were of my own making.

Rich

Rich Waugh · Oct 9, 2010

Come to think of it, most people don't know there's a right way and a wrong way to tie their shoelaces. Do it right and you have a square knot that doesn't untie and lays flat and square to the shoe. The other way yields a granny know that looks like crap and comes loose right away.

I'm almost embarrassed to admit how old I was before I learned that little gem.:ashamed:

Rich

Bob Rooks · Oct 9, 2010

bjr said:
The fuel shutoff was the first thing I changed on my JM-354. I thought the orifices were way too small on the original equipment valve and it got replaced with a 1/4" needle valve and no stainer. I'm careful to keep clean fuel and the spin on filter should trapped any thing that would hurt the injector pump. Glad to see you guys addressing the issue. bjr

The spin-on secondary fuel filter is only rated for approx. 30µ. That is gravel where fuel cleanliness is concerned. But then it's your tractor. You threw away the 20µ primary filter screen for reasons unknown. The OEM sediment bowl assembly has a free flow rate of 3 gpm with a 4' five gallon head (w/o in-tank screen). I checked it. If your engine uses over 3 gpm you have serious problems.
It is not my intention to berate or insult, sometimes it just comes out that way.

Bob Rooks · Oct 9, 2010

Rich Waugh said:
I've used Teflon tape on literally thousands of joints for fluids and gases both, and the only problems I've ever encountered were of my own making.

Using T-tape on refrigeration lines is bad ju-ju. Don't let the EPA catch you using it. On second thought, let me catch you so I can collect the $10,000.00 reward. :laughing: Yes, there is such a reward for reporting someone breaking into a reefer or A/C systems without credentials.

It's not state, it's federal.:shocked:

Otherwise, nothing wrong with T-tape.

greg_g · Oct 9, 2010

Rich Waugh said:
There is no problem at all with Teflon tape on thread joints...

Being a relative newcomer in the world of Chinese tractors, you deserve the benefit of doubt on this particular issue. But if you were to search back far enough - on ANY Chinese tractor forum - you'll find dozens of posts over the years regarding (factory) Teflon tape clogging Jinma fuel and hydraulic systems. It sorta left some of us old-timers with a bad taste for Teflon tape on our tractors. Granted I've been around these forums longer than both Ronald and Chris. But they're not exactly newbies either. I'd have thought this historical precedent would have been a consideration in both the product and the praise.

//greg//

gauthier · Oct 9, 2010

Well,although I know how to put teflon tape on,,,the shoestrings always was a pain,and now just wear boots

Transit · Oct 9, 2010

Bob Rooks said:
OK, a closer look reveals a screen. I thought it was like a 1/4" NPT step thread with the tape on the larger thread. Mike Sorrentino won't like that. :laughing:

So does this sediment bowl have the round screen inside the bowl too?

Teflon tape: A lateral move towards convenience and customer appreciation. :cool2:

Headrace? No!

Brain tumor, yes!

Just two years going nuts only to find an un-documented filter in the fuel tank.:mur::mur:

Rich Waugh · Oct 9, 2010

greg_g said:
Being a relative newcomer in the world of Chinese tractors, you deserve the benefit of doubt on this particular issue. But if you were to search back far enough - on ANY Chinese tractor forum - you'll find dozens of posts over the years regarding (factory) Teflon tape clogging Jinma fuel and hydraulic systems. It sorta left some of us old-timers with a bad taste for Teflon tape on our tractors. Granted I've been around these forums longer than both Ronald and Chris. But they're not exactly newbies either. I'd have thought this historical precedent would have been a consideration in both the product and the praise.

//greg//

Okay, so there were problems with poor assembly technique as regards Teflon tape - that doesn't make the tape the problem it makes the USER the problem. Has nothing to do with whether or not a person has owned a tractor before or not, Greg. Improper application is improper application and THAT is the problem, not the product. British vehicles were for decades noted for drooling oil from every possible gasket - doesn't make gaskets a bad idea, just means you have to use them correctly. You gotta watch those precedents and parse them for cause and effect a bit better.

Bob Rooks,

You'll never catch me breaking a reefer line, except by accident and I'm pretty darn careful not to have those accidents. (grin) I don't do reefer work for two reasons - I don't have the ticket and I don't have the knowledge. I have heard you don't use Teflon for reefer work, though. The gases I was referring to are fuel and/or compressed gases, and we actually use a special Teflon tape for those joints, though the plumber's stuff will probably work just fine.

There are places where pipe dope is preferable to tape, and some joints where one or the other is specified for various reasons. In that case you go with what the engineer specc'ed. And, of course, there are differing pipe dope compounds, some of which are allowable in some circumstances and prohibited in others. Threaded joints are always a potential problem. I like vacuum work - no tapes and no compounds allowed. That simplifies the choices right down to zero. (grin)

Rich