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JD 650 J timing issue

J

JLsanzaro

Active Member
Joined
Dec 29, 2013
Messages
37
Location
Toms River, NJ
i bought a 650 j a couple months back and it never really seemed to be running right. had it in the shop last month and did injectors and still runs rough. just wondering if anyone knows about the timing of the injection pump. its got a 4045 ht engine in it. any info would be greatly appreciated, thanks
 
D

Delmer

Senior Member
Joined
Jan 3, 2013
Messages
8,887
Location
WI
What does it do when it's running rough? If you suspect the timing, just scratch a line across the pump and engine mating surface, loosen the back nut and leave the one in front tight enough, then start it back up (I'd do it warm, but that's me?), loosen the remaining nut and turn the pump forward and backward to see if it improves.

Have you checked the valve clearance? disconnected the injectors one at a time?
 
E

eric12

Well-Known Member
Joined
Feb 10, 2011
Messages
236
Location
new york
Have you changed all the fuel and air filters and looked for more obvious things? Also when is it running rough, at idle or when its pushing or always? It might just need the throttle control adjusted. I'd hate to see you get even further into it and find out its something simple you over looked.
 
J

JLsanzaro

Active Member
Joined
Dec 29, 2013
Messages
37
Location
Toms River, NJ
yea we've done all the simple obvious things. after looking at the link that deeretracks sent I'm gonna check the backlash on the drive gear tomorrow
 
J

JLsanzaro

Active Member
Joined
Dec 29, 2013
Messages
37
Location
Toms River, NJ
ya that would be great, thank you. i have 52 pieces of cat equip and 4 JD. with cat SIS i kinda feel spoiled with all the info lol, my other equipment always makes me think a little harder
 
Deeretracks

Deeretracks

Senior Member
Joined
Feb 17, 2014
Messages
568
Location
Western Washington
Occupation
Shop Foreman
I know what you mean. I love the Deere manuals compared to Cat but I hate that Deere won't let me have Service Advisor with a full set of disks. My Cat dealer gave me unlimited SIS for free.
 
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