Timing Instructions. for BD154 w/CAV Inj Pump

Hi, can anyone out there give me some verbal instructions for timing the injection pump (CAVtype) on the BD154 diesel on my IH 3444. My tractor sat too long and the fuel went bad which varnished the internals so I had to take the pump in for a rebuild. The tractor previously ran fine, but when I pulled the pump off I noticed that none of the marks (what I expect to be for timing) appeared to line up in any sort of logical sequence. I set the Crank pulley mark to the 12 O'clock pos, but the marks on the timing gear and the Pump drive gear weren't pointing at each other or even close. I'm pretty new to this old tractor and don't have a manual...Yet. If all else fails and since nothing has been moved I'll just put it back the way it was and I guess it should run since it used to, but I would rather make sure that it is set properly. Any assistance would be Greatly appreciated.

Hi, if you marked the the mounting plate before the pump was removed and the engine was not turned over then just re-install the pump in the same position. The only problem is that the pump maybe 180 degrees out of time. So after bleeding the pump and engine dosen't fire then remove pump again and turn pump drive shaft 1 revolution, re-install and bleed pump again.

JimB

Thanks, that is what I was going to do. I just wanted to put it back together with the timing marks pointing in the right direction, I guess the idler gear must have been improperly lined up the last time it was apart. I just hate putting things together improperly but I guess I'll have to. Cheers.

Hi, I forgot the injection pump on BD-154 is not keyed to the drive gear and can be bolted to drive gear in 3 different positions. So there is 6 different positions to try.
I remembered that someone else had posted the proper way to time a BD-154, so from archives:
I also just rebuilt a BD154. I might note that the timing gear marks can be a bit deceiving due to the idler between the crank gear and the injection pump drive gear. Mine runs really nice. Fires right up after using the glow plugs when cold, but after she is warm, it takes right off.

Been a while since I've timed a CAV/Lucas injection pump, bear with me. If you pull the rectangular cover off the side of the pump (held on with 2 small bolts) you will see the side of the cam ring. It will have a scribe mark on it the you can see move in the window as you turn the pump driveshaft. When that scribe mark lines up with the square end of the snapring holding the camring in the pump body, the pump will be at start of injection. You need to know the static timing mark used for setting start of injection, usually either marked on the flywheel or front pulley, not sure on a 414, but on many engine it is right at TDC. Rotate the crankshaft in the direction of engine rotation, (to take up any lash in the timing gears) until the engine timing marks line up, with #1 cylinder on top of compression stroke. At that point match the marks in the pump and lock her down to the front plate. Turn the crankshaft back 45 degrees and bring it forward again and recheck both sets of marks. Readjust if needed, reinstall window cover plate and bleed pump. Guessing on fuel pump timing and getting too much advance can be fatal to the engine if it is expected to work hard. I refuse to use the external scribe marks on the pump and front front cover, seen them out by over 1/8 inch on a regular basis.

Hope this helps.
JimB