Body and Implement Mounting Guidelines U500 North America
Hydraulic
system
Page 194 of 294
August 2005
6 Hydraulic system
6.1 Overview
of
codes and hydraulic circuits on the
Unimog
Up to four hydraulic circuits are available for the Unimog
U500NA:
6.1.1 Hydraulic
drives
Basic hydraulics
Oil tank volume
11.89 gal / 45 l
Oil
SAE 10 W
Oil issue quantity
2.64 gal / 10 l
Single circuit system (Code H02)
Flow rate at rated en-
gine speed 2,200 rpm
12.68 gal/min / 48 l/min
Pressure
2,900 psi / 200 bar
Approx. output
Efficiency not considered!
21.45 hp
Application Implement
actuation
Front connectors
Maximum 8 sockets, sep. return line
Rear connectors
Maximum 4 sockets, sep. return line
Valves
2 to 4
Dual circuit system (Code H06, H08)
Circuit 1
6.34 gal/min / 24 l/min
Flow rates at rated engine
speed 2,200 rpm:
Circuit 2
12.68 gal/min / 48 l/min
Pressure
2,900 psi / 200 bar
Approx. output of circuit 1:
Efficiency not considered!
10.7 hp
Approx. output of circuit 2:
Efficiency not considered!
21.4 hp
Dual circuit system (Code H06, H08)
(continued)
Application
Implement actuation, constant flow
Front connectors
Maximum 8 sockets, sep. return
line, pressure line (front)
Middle connectors
Pressure line, separate return line
(circuit 2)
Rear connectors
Maximum 4 sockets, sep. return
line, pressure line (rear)
Valves
2 to 4
Power hydraulic system (closed or open circuit)
Oil tank volume
13.21 gal / 50 l
Oil
SAE 10 W
Oil issue quantity
2.64 gal / 5 l
Max. flow rate circuit 3 at rated
engine speed 1,800-1,900 rpm:
33.02 gal/min / 125 l/min
Working pressure circuit 3
4,351 psi / 300 bar
Approx. output of circuit 3:
Efficiency not considered!
83.8 hp
Max. flow rate circuit 4 at rated
engine speed 1,800-1,900 rpm:
23.78 gal/min / 90 l/min
Working pressure circuit 4
4,061 psi / 280 bar
Approx. output of circuit 4:
Efficiency not considered!
56.3 hp
Connectors
Pressure & return line in
front and/or middle
Table 6.1: Technical data of available hydraulic circuits
