5-26
5.
5.
SPECIFICATION
SPECIFICATION
Oil temperature
45
±
5˚C (113
±
9˚F)
Engine speed
High idle
Oil pressure
24.5
±
0.05 MPa
GAUGE AND TOOL
GAUGE AND TOOL
Gauge 0~35 MPa (0~350 bar, 0~5000 psi)
Temperature reader
Connect gauge to test port.
Install temperature reader (see installation
procedure in this group).
Install frame locking bar.
Heat hydraulic oil to specifications (see
hydraulic oil warm up procedure at page
6-55).
Run engine at specifications and turn
steering wheel rapidly hold approximately
22N (5lb force) pressure on wheel with
frames locked.
If steering wheel is turned slowly, it will
continue to with the frames locked.
This will give an incorrect pressure read-
ing.
If steering wheel continues to turn rapidly
with the frames locked, steering system
leakage is indicated.
Read pressure gauge. This is the steering
valve relief pressure.
If pressure in not to specification, turn
adjusting screw in relief cartridge using a
hex head wrench (6 mm) to adjust pressure.
If pressure cannot be adjusted to specifica-
tion, disassemble and inspect steering
valve.
1)
2)
3)
4)
5)
※
6)
7)
·
·
Safety lock bar
Test port
CR
CL
Relief valve
757F5SE12
STEERING VALVE
STEERING VALVE (EHPS) PRESSURE TEST
PRESSURE TEST
(250
±
5 bar, 3560
±
71 psi)
Summary of Contents for HL955
Page 557: ...7 6 MEMORANDUM MEMORANDUM ...
