Parker Denison T7DDBS-B42-B22-B12-1R00-A100 Hydraulic Pump – 054-37790-000

Series-specific model code

Original model: T7DDBS-B42-B22-B12-1R00-A100

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.
B42	Shaft-end pump core (D family) documented displacement: 137.5 cm3/rev.
B22	Centre pump core (D family) documented displacement: 70.3 cm3/rev.
B12	Cover-end pump core (B family) documented displacement: 41.0 cm3/rev.
1	Shaft code 1: keyed SAE C shaft.
R	Rotation: right-hand (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.
00	Connection/modification code: 00.

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.