Wacker Neuson 803 Service Manual

I-4 SHB 803 en – Edition 2.4 * 803s20IVZ.fm
Table of contents
Pump unit: exploded view .................................................................................. 5-3
Hydraulic pump PGP505B0040CA1H2NJ7J5C-505A0040XB1J5B1B1 (Tier IV final
from 2012) ................................................................................................................ 5-4
Pump unit: exploded view .................................................................................. 5-5
Main valve block ...................................................................................................... 5-6
Connections ....................................................................................................... 5-6
Legend ............................................................................................................... 5-7
Main valve block diagram .................................................................................. 5-8
Pressure limiting valves ..................................................................................... 5-9
Pump assignment ............................................................................................ 5-10
Traveling drive ....................................................................................................... 5-11
Function ........................................................................................................... 5-12
Swivel unit .............................................................................................................. 5-14
Swivel unit ........................................................................................................ 5-15
Swivel joint ............................................................................................................. 5-16
Sealing ............................................................................................................. 5-16
Mechanical control ................................................................................................. 5-17
Control levers (up to serial no. AI00814) ......................................................... 5-17
Drive levers (up to serial no. AI00814) ............................................................ 5-18
Control levers (from serial number AI00815) ................................................... 5-19
Drive levers (from serial number AI00815) ...................................................... 5-20
Lock lever (from serial number AI00815) ......................................................... 5-21
Troubleshooting in the hydraulic system ................................................................ 5-22
Plastic trims ............................................................................................................ 5-22
Hydraulics diagram (legend) .................................................................................. 5-24
Hydraulics diagram ................................................................................................ 5-25
Hydraulics diagram (Dual Power option) ............................................................... 5-26
Main valve block diagram ...................................................................................... 5-27
Electrical system
Ohm’s Law (current, voltage, resistance); power ..................................................... 6-2
Measuring equipment, measuring methods ............................................................. 6-2
Cable color coding ................................................................................................... 6-3
Relays ...................................................................................................................... 6-3
Use, mode of function ........................................................................................ 6-3
Electrical system ...................................................................................................... 6-4
Fuses behind the right-hand trim ....................................................................... 6-4
Relays behind the right-hand trim ...................................................................... 6-5
Fuses and relays with Dual Power option .......................................................... 6-5
Control lever push button ......................................................................................... 6-6

Wacker Neuson 803 Specifications

General

Brand	Wacker Neuson
Model	803
Category	Excavators
Language	English