Cat 12 Grader-oil change info. Help...

George,

My manual says that the crankcase provides lubrication to the injection pump housing so you don't need to handle it seperately. I have had good luck with Shell Rotella T-15-40 oil. There will probably be someone offer better ideas especially if I sugest something wrong. I operate my 71-D Blade at up to 6000 feet and temperatures from forty below zero to over a hundred degrees and have found Rotella to work as well as any other diesel rated oil I have used. Don't forget to drain the clutch housing as it gets oil from the crankcase and a small amount does not return. I have never had to change the transmision lube so I will not comment on that operation except to suggest, if it's clean, leave it alone. Also don't forget to check the chain cases for lube. It's probably a good idea to fill them a little over full as 71D's sometimes loose the oil slingers, and when that happens, drying out the bearings on the pressed-in axle is a very costly experience. Good luck.

I was under the impression that all the #12 graders from 1947 up until the 12E in 1959 (99E series in the US produced ones) had the D318 engine. I have not seen a D318 with pressure lubed injection pump housing.

I recently discovered the expensive mistake of assuming a Ford engine injection pump was pressure lubed with engine oil. If the injection pump has a filler port with a slotted/hex head plug in it, drain and refill it at the same time as the engine oil (and check it regularly).

George,

See what I mean? The great thing about this site is that someone always knows more than I do- so listen to me with caution. My 71 D does not have a filler plug on the injection pump housing, just a return pipe. I am assuming yours is similar. My D47U has the type of fuel injection housing that CCJersey mentioned so I am familiar with it. Just look below the injection pump cover and see which one you have. Also, if you have a pony motor you will need to drain and refill the pony motor clutch and pony crankcase. To drain the oil in the pony there is a pet cock on top of the engine that has to be opened - and closed when done. It's quite a mess to start the pony with the drain open.

Straight 30 would be fine for it, I also do not see a fill for the injector pump housing, so my guess would be its self filling, drain the clutch housing also, the plug for it is on the starter side of the bell housing, the trans takes 14 gallons of oil, 85/140or 80/90 work in it, there is a plug on the bottom of the rear end housing this drains trans and rear, also a plug up on the front of the trans at the driveline that truns the hydrolic pump just above the parking brake drum, this one will drain aboput a gallon or so, it fills from the rear end, also there is aplu on the bottom of the case just behind the brake drum in a recesed plate, remove this pluga nd thru it you can see the pickup screen for the oil filter, make sure the screen is no clogged up, change the filter on the left side of the housing, put all plugs in and fill thru the plug that is half way up on the rear end cover, filling here will fill alll cases when the trans turns it throws oil up to the front housing.