PSB pump timing 88 Diesel

oliverkid

Member
Have a buddy that bought an 88 Diesel. Its having issues with hard starting and running hot. Once you get it running it makes plenty of power, good throttle response and runs very smooth with very little smoke. Story he got was that the PO was trying to pull to much plow with it so they advanced the pump timing to make more power which would jive with the hard starting. How do you go about checking the timing on these and how do you go about changing it if its off? He doesnt have a book and I havent had any experience with the Bosch pumps yet.
 
The I&T manual explains timing well on that model, if it's advance too far it will start harder. The injection pump drive gear has two bolts in it that thread into the drive hub, timing is changed by trying different holes in the gear and hub.
 
(quoted from post at 12:47:50 12/18/18) Have a buddy that bought an 88 Diesel. Its having issues with hard starting and running hot. Once you get it running it makes plenty of power, good throttle response and runs very smooth with very little smoke. Story he got was that the PO was trying to pull to much plow with it so they advanced the pump timing to make more power which would jive with the hard starting. How do you go about checking the timing on these and how do you go about changing it if its off? He doesnt have a book and I havent had any experience with the Bosch pumps yet.
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Our Cockshutt 570 Super was direct injection and was sometimes hard to start when it was hot. I advanced the timing just a tiny bit and that problem went away. We had it for 36 years. The lanova system may be different though.

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I'd say you got lucky, direct injected diesels with fixed phase pumps are always a compromise between good starting and full power. Injection pumps that retard the timing during starting, then advance after running work best but many older engines don't have that feature. Retarding the timing especially helps during cold starts, allows compression heat to build up before the fuel is injected. Takes a good battery and starter, but if engines are cranked five to ten seconds BEFORE turning the fuel on many will start better cold this way, especially if there's an intake heater used to draw in warm air.
 
(quoted from post at 08:23:14 12/22/18) I'd say you got lucky, direct injected diesels with fixed phase pumps are always a compromise between good starting and full power. Injection pumps that retard the timing during starting, then advance after running work best but many older engines don't have that feature. Retarding the timing especially helps during cold starts, allows compression heat to build up before the fuel is injected. Takes a good battery and starter, but if engines are cranked five to ten seconds BEFORE turning the fuel on many will start better cold this way, especially if there's an intake heater used to draw in warm air.
I think I have been doing the opposite diesel tech. I crank until I get smoke then stop and hit the intake heater. Should lid I get the warm air in first?
 
YES! Warm the cylinders first BEFORE turning the fuel on. Local Oliver dealer here sold many diesels to fellows who always had gas after showing them how to start the diesels in cold weather. Does require good electrical system, batteries, cables, and starter. He would show fellows to preheat the intake, then crank with the heater still on for five to ten seconds, THEN turn the fuel on in cold weather. If I have a choice, I'd always prefer the intake heater over ether assist. Ether works but must be CAREFULLY used, and NEVER ether and intake heater TOGETHER..
 
(quoted from post at 09:58:49 12/22/18) YES! Warm the cylinders first BEFORE turning the fuel on. Local Oliver dealer here sold many diesels to fellows who always had gas after showing them how to start the diesels in cold weather. Does require good electrical system, batteries, cables, and starter. He would show fellows to preheat the intake, then crank with the heater still on for five to ten seconds, THEN turn the fuel on in cold weather. If I have a choice, I'd always prefer the intake heater over ether assist. Ether works but must be CAREFULLY used, and NEVER ether and intake heater TOGETHER..
Thank you. I will give it a try. I figured heat would just be pushed through if I did it first. If its real cold I put my torpedo heater on them or use a block heater. I am not a fan of either other than cleaning parts and it's not much good for that either
 
I just got finished rebuilding a 770 diesel and the top ring was broke on very piston and top ring grove was a mess also there was a can of ether on the floor of the tractor
 

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