k4330
Bronze Member
I have a jd 330 with a yanmar in it that I picked up. The prior owner put new injectors and glow plugs in it. It does not run good, I want to check the timing but don't know how.. Thanks
Injection timing
- Thread starter k4330
- Start date
- Views: 1103
thepumpguysc
Elite Member
The timing is set w/ steel shims under the injection pump & normally doesn't "just change"..
Its pretty involved, so you better get a book.. and a torque wrench.
What is> "doesn't run good" mean? slow acceleration? skip or miss? doesn't start quick enough?
Its pretty involved, so you better get a book.. and a torque wrench.
What is> "doesn't run good" mean? slow acceleration? skip or miss? doesn't start quick enough?
thepumpguysc
Elite Member
If the injectors are new & its running on about 2 cylinders & is hard to start,
the problem is either the injection pump itself.. feed pressure going TO the inj. pump if it has a lift pump..
Or it may be a restriction in the line from the fuel tank up to the inj. pump..
I would disconnect the line AT the inj. pump, take off the fuel tank cap & blow back thru the line TO the tank & listen for bubbles.
MAKE SURE the shut off valve is OPEN, if you have one..
You'll prob. get a real good stream of fuel coming back out atcha so be alert..
Hook the line back up & loosen the lines AT the injectors..
With the THROTTLE IN THE WIDE OPEN/FULL THROTTLE POSITION..crank the engine until fuel squirts out w/ no air & tighten..
It should "bust off" then.. Let us know what happened..
the problem is either the injection pump itself.. feed pressure going TO the inj. pump if it has a lift pump..
Or it may be a restriction in the line from the fuel tank up to the inj. pump..
I would disconnect the line AT the inj. pump, take off the fuel tank cap & blow back thru the line TO the tank & listen for bubbles.
MAKE SURE the shut off valve is OPEN, if you have one..
You'll prob. get a real good stream of fuel coming back out atcha so be alert..
Hook the line back up & loosen the lines AT the injectors..
With the THROTTLE IN THE WIDE OPEN/FULL THROTTLE POSITION..crank the engine until fuel squirts out w/ no air & tighten..
It should "bust off" then.. Let us know what happened..
thepumpguysc
Elite Member
Did you buy it w/ this problem?? & that's why the guy sold it??
thepumpguysc
Elite Member
If you google JD 332, on utube, theres a vid of a fella getting his going.. how to bleed the fuel system.
What to look for on the filter, what screws to turn to bleed the air & such.. hope this helps.
What to look for on the filter, what screws to turn to bleed the air & such.. hope this helps.
rScotty
Super Member
- Joined
- Apr 21, 2001
- Messages
- 9,565
- Location
- Rural mountains - Colorado
- Tractor
- Kubota M59, JD530, JD310SG. Restoring Yanmar YM165D
Right. As the pump guy says. Dollars to donuts says your problem is somewhere between the fuel tank and the injectors. And it sounds like something so simple that it is easy to overlook. Either something is blocking fuel through the lines, or some joint is leaking air into the lines. If it ran on 2 cylinders recently it probably isn't the high pressure fuel pump. Don't go there yet. If you do go there, first thing is to measure the pressure at the injectors and at the pump.
You want to leave changing injector timing to the very last. Way last. For one thing, it can't really change unless it is messed with. Injector timing should last unchanged for the life of the injector pump, and often for the life of the tractor. For another, injector timing isn't hard to understand, but it is real picky work. The sort of thing that mechanics prefer to do in a clean shop with all the right tools which includes things like degree wheels, dial indicators, pressure gauges, and very exact shims measured in thousandths of an inch. Otherwise you just end up guessing at it.
YMMV, rScotty
You want to leave changing injector timing to the very last. Way last. For one thing, it can't really change unless it is messed with. Injector timing should last unchanged for the life of the injector pump, and often for the life of the tractor. For another, injector timing isn't hard to understand, but it is real picky work. The sort of thing that mechanics prefer to do in a clean shop with all the right tools which includes things like degree wheels, dial indicators, pressure gauges, and very exact shims measured in thousandths of an inch. Otherwise you just end up guessing at it.
YMMV, rScotty
thepumpguysc
Elite Member
They wont run very well on 2 cylinders, if at all..
Loosen the steel lines up AT the injectors.. actually, take them completely loose..& pull them away from the injectors SLIGHTLY.
Now crank the engine.. what do the squirts look like.. only 2.?? All 3.?? 2 strong & 1 dribble.??
So lets pause a sec.. You have GOOD STRONG fuel UP TO the inj. pump.. but "crap" coming out.. Theres only 1 thing between them.. the injection pump..
If you need guidance getting it off, let me know..
PLEASE.. do not take the pump apart if you expect someone else to work on it.. it costs more & we're here to help each other out..& save money.
Loosen the steel lines up AT the injectors.. actually, take them completely loose..& pull them away from the injectors SLIGHTLY.
Now crank the engine.. what do the squirts look like.. only 2.?? All 3.?? 2 strong & 1 dribble.??
So lets pause a sec.. You have GOOD STRONG fuel UP TO the inj. pump.. but "crap" coming out.. Theres only 1 thing between them.. the injection pump..
If you need guidance getting it off, let me know..
PLEASE.. do not take the pump apart if you expect someone else to work on it.. it costs more & we're here to help each other out..& save money.
