DECKMASTER
5.0
BRAKE
Ausco No. 31025
Rated Torque: 3800 in-lbs
6.0
HYDRAULIC MOTOR
TRW Ross No. MAB-10-0-Q2-A1
Displacement = 7.4 in3/Revolution
Efficiency Torque
= hT = 0.87
Volumetric
= hV = 0.92
Overall
= hOA = 0.80
Torque = 118 in-lbs/100 PSI (theoretical)
Required Input Hydraulic Pressure
1883
1
=
•
1.18
0.87
= 1834 PSI
Required Input Flow
1 gal
1
= (281.1 Rev/min) (7.4 in3/Rev) ( ) ( )
= 9.8 GPM
231 in3
0.92
7.0
HYDRAULIC PUMP
Sundstrand No. 20-2065-HDC
Rated Pressure = 3,000 PSI
Efficiency: Volumetric
h
V
=
0.95
Overall
h
OA
=
0.90
Flow = 14.6 GPM @ 1750 RPM
Assume System Pressure Drop of 300 PSI
Required Pump Output Pressure = 2134 PSI
Required Electric Horsepower
Max.
(2134) (14.6)
=
(1714) (0.90)
= 20.2 Horsepower
Normal (2134) (9.8)
=
(1714) (0.90)
= 13.6 Horsepower
2-4
