well jerry,
looking in any current cat manuals they do not list this model. If it is truly a V1100 this must be like a quarry truck? the biggest cat forklift i can find in thier current manuals is a V330 and obviously the V1100 is alot larger. Its so old the serial number does not come up as a good serial number in their db.

But anyhow it sounds to me like you guys figured it out already with the bad seals.

good luck on that repair :o)