Wacker Neuson 28Z3, Service Manual

Page: 156 / 264

5-24
SHB 28Z3 EN – Edition 2.0 * 28z3s510.fm
Hydraulic system
5.8 Swivel unit
Hydraulically controlled swash-plate piston motor with maintenance-free swivel gearbox
and mechanical motor brake.
The shock anticavitation valves are dampened for smooth braking.
X X
X
2'
1 2
8
1
2
9
7
3
6
5
4
7
5
1
2
6
4
7
8
10
Pos.
Designation
1
SH brake release port (-> shuttle valve)
2
Pilot control pressure port (-> pilot oil supply unit)
3
Brake release valve
4
Right-hand rotation port (-> main valve block)
5
Anticavitation line port (-> main valve block/tank)
6
Left-hand rotation port (-> main valve block)
7
Pressure limiting valves
8
Leak oil port (-> tank)
9
Brake piston
10
Shock anticavitation valves