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SYSTEMS OPERATION
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As the inching pedal is farther depressed, plunger
1 is moved to the position indicated. Now,
inching spring 6 becomes expanded andpres sure
proportional to the load of this spring so
expanded is built in the pressure chamber,
decreasing secondary pressure (PD2).
Thus
secondary pressure (PD2) varies from 4 to 0
kgf/cm2 (57 to 0 psi) [0.4 to 0 MPaJ within the
range of 4 to 16.5mm (0.16 toO.65 in.) stroke of
plunger 1.
16.5
mm
(0.65 in.)
0 kgf/crn2
(0 psi)
[0
MPa]
602328A
As the inching pedal is depressed, plunger 1 is
moved to the right. When it is moved 4mm (0.16
in.), valve 5 meters the oil flowing into passage'
4 from passage 3 and, at the same time, starts
draining
oil from passage 4 to the oil sump
throughpassage 8 to reduce the directional clutch
secondarypressure down to 4kgf/cm2(57 psi) [0.4
MPa].
•
4mm (0. 16 in.)
4
(57 psi)
/~o.4
MPa]
5
10
15
Stroke (mm)
602327A
6
4 mm (0.16 in.)
4 kgf/cm2
(57
psi)
/
[0.4
MPaJ
1~—
Stroke (mm)
29
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