Pressure Check; General; Overview Of Measuring Ports (Up To Serial Number Ag02712); Overview Of Measuring Ports (From Serial Number Ag02713) - Wacker Neuson 28Z3 Service Manual

3.13 Pressure check

General

Overview of measuring ports (up to serial number AG02712)

1
3
2
4
Fig. 36: Measurement ports

Overview of measuring ports (from serial number AG02713)

1
3
4
Fig. 37: Measurement ports
SHB 28Z3 EN – Edition 2.0 * 28z3s312.fm
• Run the machine warm before checking the pressure! Hydraulic oil temperature: 50 °C
min. (operating temperature)
• Pressure drop is checked by reducing revs from maximum to idling speed at constant
load
• Set the primary pressure limiting valves (PPLV) at maximum engine speed.
• The pressure settings are listed in chapter "Specifications"
– see Hydraulic system on page 2-3
• Ensure utmost cleanliness of all measuring points and ports, micro measuring
lines and pressure gauges that are connected for checking pressure => even the
slightest traces of dirt, e.g. a grain of sand, can impair tightness and cause leaks
Pos.
Designation
1
Pump 1 measuring port
2
Pump 2 measuring port
3
Pump 3 measuring port
4
Pilot oil supply unit measuring port
Notice!
Measuring ports
carried out in the same way.
Pos.
Designation
1
Pump 1 measuring port
2
Pump 2 measuring port
3
Pump 3 measuring port
4
Pilot oil supply unit measuring port
2
Fig. 36 and Fig. 37 differ in design only. The pressure check is
Maintenance
MP 1
MP 2
MP 3
MP 4
MP 1
MP 2
MP 3
MP 4
3-31