DPete
Senior Member
I've had to push my 623's in sand but just for added traction not pushing like an open bowl. Operators took the normal cut an I'd just keep the rolling with my 6R.
Bearing in mind that I have never operated a Wabco scraper larger than a 111A but have worked with plenty of 222's, I think the 2 things they had going for them was 1 the Hancock bowel and 2 the Allison trany with the load mode which allowed more engine power to drive the generator. Since the Wabco were built hydraulics have come a long way from driving things with a gear pump.Pretty amazing how efficient those electric drive WABCO's were with the hancock elevating bowl chowing down the dirt .
Push loading will just jam up the elevator, but... I have pushed elevating machines in slimy mud/clay or saturated sand. The machine was at wide open throttle with the trans in neutral to put maximum power to the elevator and Mr. push cat guy was instructed to be very gentle pushing and watch the elevator output. Twin engine Wabco's had this built in feathering ability where you could load very fast in a short distance using full power from the front engine and using the rear to just nudge the machine forward as the elevator pulled material in.
Bearing in mind that I have never operated a Wabco scraper larger than a 111A but have worked with plenty of 222's, I think the 2 things they had going for them was 1 the Hancock bowel and 2 the Allison trany with the load mode which allowed more engine power to drive the generator. Since the Wabco were built hydraulics have come a long way from driving things with a gear pump.
Hence my comment up thread about fitting transmission pumps to drive the elevator. For the last 9 years I have owned and operated a forestry mulcher with the same type of drive system which works a darn sight harder than the elevator on a scraper with no big problems in that part of the machine. I would love to see more Wabcos running today, they were away ahead of there time and Cat hasn't court up yet IMHO.
Quite honestly the Wabco 3phase system was more efficient than any high pressure hydraulic system ever could be. .
The Old Man & I were having a similar conversation today . Electricity is pretty efficient . Can you imagine running hydraulic lines to each home to power the appliances for the everyday needs of a family ?
The old boys at Westinghouse got it figured out early on .
Yep, and later sold out to American Standard... The commercial toilet company.WABCO ... Westinghouse Air Brake Company .
They were in to a little bit of everything at the time .
Allison trany if I remember correctly. The 412 was a good reliable machine in it's day. They are much better riding than a 613.I expect they will be DT466 engines, not sure of the transmissions, Clark?
Any particular weak points or problem areas on these? Strong points? Thanks again for all your help/opinions/experience.