Hi wondering if anyone can give me some info about a 1967 Cat 966B loader .First query is the oil in the planetry hubs seperate to the diff oil and if so how much does each hub hold also if the hubs are seperate is the hub oil the same as the diff oil. 2nd query with regards to a fair amount of blowby is this a major concern if it has nothing to do with water in oil. Thanks for any replys.
966 B Cat planetary and diff oils are not really separate, no seals to keep oil from moving from one to the other. SIS does not have information on the 966B but the early 966C should be very close. That one shows 30 liters in front axle and 34 liters in rear axle. In the maintenance section they only say to fill the axles at that fill plug, would be front center of axle on the front and just outside the frame on the rear side of rear axle. That said I would start by putting some oil in the planetary on either side then fill the axle to the bottom of the plug. Run machine for a bit of time and recheck at the axle fill plug. As for the blowby, that one is hard to judge without being there or knowing how the engine runs in general. Also it would depend on your application for this machine. If only used for a few hours a week on a farm doing clean up chores and it starts up when needed and does not use much oil I'd be tempted to just watch for any changes over time. On the other hand if this machine is expected to work hard 12 hours a day digging in a gravel pit year round I might be shopping around for a in-frame overhaul kit and make it a project for the next slow week. If doing the in-frame I would have a shop lined up to do the head while it's off, new valves and guides and what ever is needed.
Thanks for that info. The loader will only be used for reasonably light farm work stacking about approx 2 ton logs and pushing out old stumps
As I recall the B series could have axle oil move to there finals but not very fast because the level in the axle housing was just below the level of the hole where the axle shaft went through. We would fill the axle to the proper level and then the finals to their proper level. If you parked the machine tilted to one side and checked the final in the morning it would be overfull. The B series as far as I remember all had glow plug engines and would start OK with a fog of crankcase vapor coming out. It is a sign though that things are getting old and worn and the possibility of sudden catastrophic failures become greater every time you start the engine.