Parker Denison T7DDBS-B31-B31-B15-2L00-A101 Hydraulic Pump – 054-35621-000

Series-specific model code

Original model: T7DDBS-B31-B31-B15-2L00-A101

Code coverage: Evidence-supported selected code meanings identified.

Evidence profile: T7DDBS exact single/double/triple ordering-code profile (HY29-0001/UK evidence revision 6)

Code segment	Evidence-bound meaning
T7DDBS	Series: T7DDBS.
B31	Shaft-end pump core (D family) documented displacement: 99.2 cm3/rev.
B31	Centre pump core (D family) documented displacement: 99.2 cm3/rev.
B15	Cover-end pump core (B family) documented displacement: 50.0 cm3/rev.
2	Shaft code 2: keyed SAE CC shaft.
L	Rotation: left-hand (counter-clockwise), viewed from the shaft end.
00	Porting code: 00 (standard porting).
A	Design letter: A.
1	Seal code 1: S1 BUNA N seal class.
01	Connection/modification code: 01.

The exact longest series prefix determines the number and family of pump-core slots. Displacement codes are decoded only through the family table printed for that slot; identical codes are not generalized across A-AS, A-ASW, B, C, D or E cores. Shaft identity remains tied to the complete series. R/L is interpreted from the shaft-end view. Porting 00 is standard; other catalog-shaped porting codes are retained and require physical-orientation confirmation. Unsupported families and unknown special tails fail closed without blocking earlier evidence-supported fields.