Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 07-05-2011, 12:06 AM
whiffyspark whiffyspark is online now
LawnSite Fanatic
 
Join Date: Jul 2011
Location: Chesapeake beach
Posts: 5,425
JD 4400 Yanmar Won't run

My JD 4400 Isn't getting fuel past the injection pump. The tractor had been sitting for a couple years, I drained the fuel changed filters, lines, etc. and now it won't start. If I give it a wiff of wd40 it'll run, but i'm not getting any fuel out of the injector lines. I've tried bleeding them with the plunger to no avail. The soleniod has a loud click and i'm getting over 12 volts at it with the key on so I don't think it is the solenoid or thermistor. I'm getting fuel to the pump.

If i crack open either line on the pump fuel comes out, but it won't come out of the injector line no matter what i do.

Any Ideas?

Thanks, Mike
Reply With Quote
  #2  
Old 07-05-2011, 07:05 PM
whiffyspark whiffyspark is online now
LawnSite Fanatic
 
Join Date: Jul 2011
Location: Chesapeake beach
Posts: 5,425
Anyone? \\

I really need to get this running
Reply With Quote
  #3  
Old 07-05-2011, 08:21 PM
ricky86 ricky86 is online now
LawnSite Bronze Member
 
Join Date: Aug 2008
Location: Monmouth Cty N.J.
Posts: 1,262
I think there is a screen in the inlet of the pump. Just something to check. Does anything come out the bleeder valve? You have to be positive the solenoid isn't stuck. That might mean removal for inspection.
Reply With Quote
  #4  
Old 07-05-2011, 08:48 PM
whiffyspark whiffyspark is online now
LawnSite Fanatic
 
Join Date: Jul 2011
Location: Chesapeake beach
Posts: 5,425
Well I inspected it some more. Looks like the fuel pump isn't running. I've got a good ground and 7.5 volts on the thing outside the tank. Nothing changes when the key is turned on. I guess this explains why there is no pressure. I switched the relay and cleaned the contacts. Anyone have wiring diagrams?

I can fix a powerstroke all day but these little tractors are kicking my ... lol
Posted via Mobile Device
Reply With Quote
  #5  
Old 07-06-2011, 12:32 PM
whiffyspark whiffyspark is online now
LawnSite Fanatic
 
Join Date: Jul 2011
Location: Chesapeake beach
Posts: 5,425
Well in a hurrry last night the voltage i checked was the tank level sensor lol.. still can't get it started
Reply With Quote
  #6  
Old 07-06-2011, 07:10 PM
ricky86 ricky86 is online now
LawnSite Bronze Member
 
Join Date: Aug 2008
Location: Monmouth Cty N.J.
Posts: 1,262
You don't seem to listen to any suggestions.
Reply With Quote
  #7  
Old 07-06-2011, 07:15 PM
whiffyspark whiffyspark is online now
LawnSite Fanatic
 
Join Date: Jul 2011
Location: Chesapeake beach
Posts: 5,425
Where is the actual bleeder valve bud? I took the solenoid off and cycle it its not stuck. Disregard the voltage that was for the level sensor. I have 12.xx volts at the solenoid plug. I have fuel coming out of all the lines but the injectors. I couldn't find a screen.
Posted via Mobile Device
Reply With Quote
  #8  
Old 07-06-2011, 07:16 PM
whiffyspark whiffyspark is online now
LawnSite Fanatic
 
Join Date: Jul 2011
Location: Chesapeake beach
Posts: 5,425
I don't think it actually has a fuel pump either I think its just gravity fed. I took the black mechanical pump apart couldn't find anything wrong with it
Posted via Mobile Device
Reply With Quote
  #9  
Old 01-25-2013, 03:56 PM
dstifel's Avatar
dstifel dstifel is offline
LawnSite Senior Member
 
Join Date: Oct 2012
Location: des moines ia
Posts: 797
THis is a long shot but do you have any pictures of the thermistor mine is bad but i can't seem to locate it. Thanks
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 04:06 AM.

Page generated in 0.07016 seconds with 9 queries