Hartzell HC-D2MV20-3 Series Owner's Manual And Logbook page 56

3. Model Designation
The following pages illustrate sample model designations for
Hartzell Hydro-Selective propeller hubs and blades.
STEEL HUB PROPELLER MODEL IDENTIFICATION
HC - D 3 V 20 - 6 L
BASIC SHANK
BASIC HUB DESIGN
DESCRIPTION AND OPERATION
L - LEFT HAND ROTATION
3
6
7
SPECIFIC DE-
SIGN FEATURES
8
8D - USES 91-8DT HYDRAULIC UNIT; 93-E VALVE ASSEMBLY
20 - SAE 20 SPLINE
MV - SINGLE SHOULDER BLADE RETENTION SYSTEM
V
- DOUBLE SHOULDER BLADE RETENTION SYSTEM
X - DOUBLE SHOULDER BLADE RETENTION SYSTEM
2 OR 3
NO. OF BLADES
D - SPLIT BEARING RETENTION, HYDRAULIC PITCH
CHANGE MECHANISM MOUNTED ON ENGINE
HC - HARTZELL CONTROLLABLE
Propeller Owner's Manual
140
- 8.875 " (22.54 CM) DIAMETER CYLINDER,
4.65" (11.81 CM) LONG
COUNTERWEIGHTS; USES 91-3E HYDRAULIC UNIT
- 91-6L HYDRAULIC UNIT
- USES 91-7DS HYDRAULIC UNIT; 93-A, B, C VALVE
ASSEMBLY - NON GOVERNING; 93-AG, BG, CB VALVE
ASSEMBLY - GOVERNING
- USES 91-8DS HYDRAULIC UNIT; 93-A, B, C VALVE
ASSEMBLY - NON GOVERNING; 93-AG, BG, CB VALVE
ASSEMBLY - GOVERNING
61-00-40
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Nov/02