2-55
BRAKE SYSTEM
BRAKE SYSTEM
Control valve swing brake system
Control valve swing brake system
This is the brake system to stop the swing motion of the excavator during operation.
In this system, the hydraulic circuit is throttled by the swing control valve, and the resistance
created by this throttling works as a brake force to slow down the swing motion.
Mechanical swing parking brake system
Mechanical swing parking brake system
This is function as a parking brake only when the swing control lever and arm in control lever are
not operated.
Brake assembly
Brake assembly
Circumferential rotation of separate plate
(14) is constrained by the groove located
at casing (1). When housing is pressed
down by brake spring (16) through
friction plate (13), separate plate (14)
and parking piston (15), friction force
occurs between friction plate and
separate plate.
Friction force constrains motion of
cylinder block (8). When hydraulic force
exceeds spring force, brake is released.
Work
Deceleration
Stop
MCV A, B opened
MCV A, B throttled
MCV A, B closed
MCV
MCV
MCV
A
B
A
B
A
B
Groove
8
13
1
14
15
16
1 Casing
8 Cylinder
block
13 Friction
plate
14 Separate
plate
15 Parking
piston
16 Brake
spring
4)
4)
(1)
(1)
(2)
(2)
①
2-48(1)
140WF2SM35
Содержание HX145 LCR
Страница 11: ...SECTION 1 GENERAL SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10...
Страница 204: ...4 5 MEMORANDUM HYUNDAI HEAVY INDUSTRIES CO LTD CONSTRUCTION EQUIPMENT DIV...
Страница 553: ...8 82 Insert O rings to the relief valve 30 and reassemble them to rear cover 20 This completes assembly 17 32038SM42...
Страница 627: ...8 155 125LCR8TM30 Turn casing 1 upside down and remove oil seal 3 using jig 29...
Страница 636: ...8 164 125LCR8TM61 After assembling spring 44 in order clamp plug 41 Tightening torque 5 kgf m 36 lbf ft 31...
Страница 657: ...8 185 8 185 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10...
Страница 668: ...8 196 14 15 3 Install cover 3 to body 1 and tighten bolts 14 Torque 10 12 5 kgf m 72 3 90 4 lbf ft 7 21078DA10...