Baroness LM331, Service Manual, Page: 66 / 165

Caution
Before starting pressure measurement, make
sure that there are no people around the
machine.
Caution
Use a pressure gauge and hydraulic hose
which can withstand the pressure of 13.7 MPa
(140 kgf/cm
2
) (1,987 psi) or more.
Before pressure measurement, perform the
following operations.
Install the gauge bulb and high-pressure
hose to the pressure gauge for high
pressure measurements.
1 2 3
g2hgdk-006
Up/Down Circuit (Rise)_002
1
Pressure gauge for high pressure
measurements
2 Gauge valve
3 High pressure hose
Apply the parking brake.
Move the stop valve to the "Open" side, and
then lower all mower units.
Stop the engine.
Remove the rear cover.
1.
[1]
2.
3.
4.
5.
Remove the hydraulic pressure
measurement port plug of the stack valve
using an M6 hexagon wrench.
1
2
dmxdti-022
Up/Down Circuit (Rise)_003
1 Stack valve
2
Hydraulic pressure measurement port
plug
Install a 90-degree elbow 1033-6 to the stack
valve hydraulic pressure measurement port.
Install an hydraulic pressure measurement
tool prepared in advance to the 90-degree
elbow 1033-6.
1
2
3
dmxdti-023
Up/Down Circuit (Rise)_004
1
Pressure gauge for high pressure
measurements
2 High pressure hose
3 90-degree elbow 1033-6
Open the gauge valve of the hydraulic
pressure measurement tool.
Start the engine, and rev it up to the
maximum rpm with all mower units lowered.
It is normal if the pressure is 13.7 MPa (140
kgf/cm
2
) (1,987 psi) when you operate the
up/down lever to raise the unit and the up/
down cylinder is fully extended.
6.
7.
8.
9.
10.
11.
LM331
Hydraulic system
Page 4-40
Measurement