I stand corrected...just dug my 951C/955L/977L brochure,
Form AE021120-01, out of the file...the 955L does indeed have a D330 4 cylinder turbocharged engine, 425 CID or 7 litre, rated at 130 horsepower. the 951C has the same engine, non turboed, rated at 95 HP. The 977L has the D333 6 cylinder, rated at 190 hp, which I am betting was changed to the 3306 later in it's production..
955L Specs
955L Bucket capacity 1.75-2.25 yard
6 roller track frame
Guage 66" Standard shoe width 15"
Machine width without bucket 7'1"
Height 9'3" to top of stack, 7'6" to top of seat.
Length, drawbar to front of track 11'
Lenght to tip of bucket (varies according to bucket) GP type 16'3"
Max height to top of spill guard, GP bucket, 16'3" bucket raised.
Operating weight 30,200 2 yard bucket, 30,400 2.25 yard bucket.
These specs are for a machine with no ROPS, not sure exactly what year brochure this is.
Guessing from the specs, the scarifier adds app. 6,770 lbs to the machine.
This is what the static tipping load is increased by when a ripper is added.
Open rops probably adds another 1-2000 pounds.
Hope this helps!
Alan627b