2-56-6
1
Sleeve
2
Poppet
3
Poppet seat
4
Spring
5
Spring seat
6
Shim
7
Piston
8
Stopper
9
Plug
10
O-ring
11
O-ring
Construction of relief valve
The valve casing contains two cartridge type relief valves that stop the regular and reverse
rotations of the hydraulic motor. The relief valves relieve high pressure at start or at stop of swing
motion and can control the relief pressure in two steps, high and low, in order to insure smooth
operation.
Function of relief valve
Figure illustrates how the pressure acting
on the relief valve is related to its rising
process. Here is given the function,
referring to the figure following page.
10
8
5
1
4
3
9
6
9
2
11
P=pressure, T=time
P
Ps
P
2
P
1
1
2
3
4
T
RELIEF VALVE
3)
(1)
(2)
145WF2SM25
2-48(2)
Summary of Contents for HX140L
Page 12: ...SECTION 1 GENERAL SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10...
Page 209: ...4 5 MEMORANDUM...
Page 694: ...8 68 125LCR8TM30 Turn casing 1 upside down and remove oil seal 3 using jig 29...
Page 734: ...8 108 Assemble plug 2 Plug NPT1 16 11 EA 17 21078TM68 21078TM69 21078TM70 21078TM71...
Page 756: ...8 130 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10...