PDF Service Manual Link-Belt 470X3 Excavator - 10 MB
This comprehensive service manual is the complete guide for repairing and maintaining the Link-Belt 470X3 Excavator.
It provides technicians with detailed step-by-step procedures for all major systems, including hydraulics, engine, and electrical components.
This manual is essential for accurate diagnostics and efficient repairs.
Ensure your excavator is serviced to factory standards by using this official resource.
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--- Page 1 ---
470X3
Excavator
SERVICE MANUAL
WLSM4706-08LX
Jun. 2018
--- Page 3 ---
SAFETY
[2] Boom position
Warning
SAFETY
･ If the machine has been modified so that the boom position has been lowered, the machine will not
satisfy the ROPS criteria.
･ It is necessary to consult with us if it is possible that the boom's position has been lowered by
modification.
･ The extent to which a boom position has moved cannot be determined in the same way for all
machines.
*
a
9tu5am-001
a Ground point
With the tip of the bucket in contact with the ground surface at maximum work radius, if the
position (* in the diagram) that overlaps with the cab when viewed from the side is markedly
lower than that of a standard machine (standard arm), the machine will not satisfy the ROPS
criteria.
Also, with a machine body with a cab mounted that can withstand up to 31 tons, the effect of
mounting a 24 ton machine, which is near the restriction weight, and a 21 ton machine to the
same cab will not be the same.
3. Prohibited items
･ Modifications that reduce the strength of a platform that has a cab with a ROPS mounted to it.
(Actions or modifications that reduce the functionality of the anchoring part at the left-rear of
the cab)
･ Modifications that effect the strength of the ROPS of a cab.
Modification
All modifications (grinding, welding, drilling holes, removing, etc.) are
prohibited
prohibited.
(red part)
Modification
Removal of parts is prohibited.
permitted under
Bar welding and making holes (up to diameter 20 mm (0.787 in.)) by drilling
conditions
are possible.
(gray part)
1-7
--- Page 4 ---
A. LOWER
Code Part name Code Part name Code Part name
1 Casing 22 D-ring (small diameter) 43 O-ring
2 NPT1/16 plug 23 D-ring (large diameter) 44 Check valve
3 Expansion plug 24 Rear cover 45 Check valve spring
4 Oil seal 25 NPT 1/16 plug (mec) 46 M6 orifice
A. LOWER
5 Circle R retaining ring 26 Spool assembly 47 O-ring
6 Tilting piston 27 Spring receiver 48 M6 orifice
7 Tilting piston seal 28 Spring 49 O-ring
8 Steel ball 29 M42 plug 50 O-ring
9 Shaft 30 O-ring 51 Bearing
10 Bearing 31 Pilot spool 52 Shim
11 Pivot 32 Pin 53 Parallel pin
12 Shoe plate 33 Spring receiver 54 Valve plate
13 Cylinder block 34 Spring 55 Brake spring
14 Cylinder spring 35 Pilot valve plug 56 Hexagon socket head bolt
15 Spring receiver 36 O-ring 57 Overload valve
16 Spherical joint 37 Joint 58 Hexagon socket head bolt
17 Shoe retainer 38 G1/4 plug 59 Coupling
18 Piston assembly 39 O-ring 1B P11 60 C-shaped retaining ring for hole
19 Separator plate 40 Orifice (brake valve) 61 G1/2 plug
20 Friction plate 41 Orifice spring (brake valve) 62 O-ring
21 Brake piston 42 G1/8 plug 63 O-ring
￭Summary explanation of component parts
The motor is made up of the following main components.
･ Rotary group producing rotational force
･ Parking brake that prevents self-travel when the machine is parked
･ Variable mechanism section that switches the motor capacity between high and low
･ Overload relief valve installed to the rear cover
･ Brake valve section (counter balance valve) that plays a critical role in controlling the hydraulic
circuits
￭Rotary group
The cylinder block (13) is fit into the teeth grooves on the spline of the shaft (9), which is supported
at both ends by the bearings (10), (51). This cylinder block (13) is pressed against the rear cover
(24) together with the valve plate (54) by the cylinder spring (14).
The nine piston assemblies (18) slide along the surface of the shoe plate (12) while moving in and
out of the cylinder block (13). There are static pressure bearings at the end surface of the piston
assembly (18) shoe to reduce the sliding resistance. The spring force of the cylinder spring (14) is
transmitted through the spring receiver (15), spherical joint (16), and shoe retainer (17) to press the
end surface of the piston assembly (18) against the shoe plate (12) so that the piston moves without
separating from the surface of the shoe plate (12).
￭Parking Brake
A separator plate (19) and friction plate (20) are fit into the spline groove around the outer edge of
the cylinder block (13) in an alternating pattern and are pressed against the casing (1) by the 14
brake springs (55) via the brake piston (21).
￭Variable Capacity Mechanism Section
This section comprises the pivot (11), which is fit into the 2 semispherical indentations on the shoe
plate (12) and support the shoe plate (12), the tilting piston (6), which revolves the shoe plate (12)
around the pivot (11), the tilting stopper (1-1), which supports this revolution at the determined
position, the pilot valve section, which brings the pressure oil to the tilting piston (6) according to the
external command, and the 3 check valves (44), which take out and send to the pilot valve section
the highest of the 3 pressures among the external command pilot pressure, the motor inlet pressure,
and the motor outlet pressure.
2-7
--- Page 5 ---
A. LOWER
Basic Functions
Travel Speed Selection
Purpose
The travel motor tilting angle is changed by switching the travel speed between low speed and
high speed with the switch. (Travel speed switchover)
A. LOWER
4 3
2
2 nrmin STOP
6 1
5
D6CF2E9D
1 Computer A 3 Travel motor 5 Travel 2-speed select solenoid
2 Travel 2-speed select switch 4 Monitor 6 Computer B
Operation explanation
[1] When the key is turned ON, the travel 2-speed select solenoid turns OFF and the travel mode
icon on the monitor is set to low speed.
[2] When the travel 2-speed select switch is pressed, the travel 2-speed select solenoid turns ON
and the travel mode icon on the monitor is set to high speed.
[3] When the travel 2-speed select switch is pressed again, the travel 2-speed select solenoid
turns OFF and the travel mode icon on the monitor is set to low speed.
2-21
--- Page 6 ---
A. LOWER
8. Remove the O-ring (2) on the cover (1) 10. When replacing bushings (1) (2), use jig A
side. (4) to restrain it from the side where the
･ Check whether the O-ring is twisted. shaft (3) was removed and press it out
If it is twisted, replace it with a new one. with a pressing machine (5).
A. LOWER
5
2 4
1
1
3
2
jdlkdp-099 jdlkdp-184
9. Use a caliper (4), micrometer caliper (5), Assembly Procedures
and cylinder gauge (6) to measure the 1. Clean all parts.
roller (with bushing) (1), bracket (2), and ･ Find a clean location.
shaft (3) for wear and deformation. ･ Place a rubber plate or cloth on the
Replace with new parts as necessary. work platform so as not to damage the
parts.
1
1
865pau-220
4
1 Cleaning fluid
5 3 2. After cleaning the parts, air blow them to
1 6
remove any remaining cleaning fluid or
debris.
2
jdlkdp-100
865pau-221
3. If the bushing (1) was removed during
disassembly, put it into the roller (2).
Face up the thrust plate installation side,
restrain from above using jig B2 (3), and
push in with the pressing machine (4).
2-35
--- Page 7 ---
A. LOWER
Tightening torque for installation: 49.0 - 6. Open the shoe (1) to the rear.
68.6 N·m (36.147 - 50.605 lbf·ft.)
A. LOWER
1
5s6qhg-054
7. Use the wrench [36 mm (1.417 in.)] to
remove the 24 bolts (1).
Tightening torque for installation: 900 -
1 1051 N·m (663.92 - 775.31 lbf·ft.)
1
1
5s6qhg-051
4. Pull out the S-pin (1) from the rear of the 2700AD0E
joint section.
8. Remove the drive sprocket (1) from the
travel motor (2) using a wire rope.
2
1
5s6qhg-052
1
5. Place a striking jig (2) against the master 8AA7CC8F
pin (1) and hit it with a hammer (3) to push
the master pin out. Installation of Drive Sprocket
To install, perform the reverse of the removal
3 procedure.
･ Tightening torque M24: 900 - 1051 N·m
(663.92 - 775.31 lbf·ft.)
2 1
5s6qhg-053
2-49
--- Page 8 ---
A. LOWER
Removal and Installation of Center 2. Install the specialty adapter (1) to the area
Joint where the air breather is removed, and set
the vacuum pump (2).
Caution Create negative pressure in the hydraulic
･ Be sure to stop the engine before beginning tank using the vacuum pump.
A. LOWER
work.
･ Be sure to inspect the wire rope or other lifting 2
equipment before beginning work.
･ Do not let anyone go under a suspended load.
1
Items to prepare
･ Wrenches [19 mm (0.748 in.), 27 mm (1.063
in.), 41 mm (1.614 in.)]
･ Hexagon wrenches [5 mm (0.197 in.), 8 mm
(0.315 in.)]
mqap7t-013
･ Box wrench [19 mm (0.748 in.)]
3. Use a box wrench [19 mm (0.748 in.)] to
･ Specialty adapter for vacuum pump
remove the 8 bolts (1), and then remove
connection
the lower under cover (2).
･ Vacuum pump (vacuum pump power
supply)
･ Extension cable
･ Marking pen
･ Cap
･ Plug
･ Wire rope (with the required breaking load)
･ Liftcrane (with the required lifting capacity)
･ Wood planks, etc. 1 2
･ Rag
mqap7t-014
･ Cleaning fluid
4. Prepare a waste oil can (1) to receive the
Removal of Center Joint oil that spills out under the center joint.
1. Use a hexagon wrench [5 mm (0.197 in.)]
to remove the 4 bolts (1), and then remove
the air breather (2) on the hydraulic tank.
Tightening torque for bolt installation: 2.94
- 4.90 N·m (2.1689 - 3.6146 lbf·ft.)
2
1
1
mqap7t-015
mqap7t-012
2-63
--- Page 9 ---
A. LOWER
2
1
A. LOWER
1
5s6qhg-045 5s6qhg-041
3. Use a wrench [27 mm (1.063 in.)] to install 6. Wrap the shoe (1).
the elbow (2), and use a wrench [19 mm
(0.748 in.)] to connect the pilot hose (1).
2
1
1
q1n8d5-030
7. Insert the master pin (1).
Insert the S-pin (2) and bend it so that it
5s6qhg-043
4. Use wrenches [27 mm (1.063 in.) for drain cannot slip out.
hose, 41 mm (1.614 in.) for high-pressure
hose] to connect the drain hose (1) and
high-pressure hose (2).
2 1
2 1
q1n8d5-031
8. Tighten the check valve (1).
2
While monitoring the track shoe tension,
inject grease into the grease cylinder.
5s6qhg-042
5. Use a wrench [19 mm (0.748 in.)] to install
the cover (2) with 4 bolts (1).
Installation bolt tightening torque: 63.7 -
1
73.5 N·m (46.991 - 54.220 lbf·ft.)
1
q1n8d5-032
2-77
--- Page 10 ---
A. LOWER
2. Place a screwdriver or other tool on the
16 divided surface of the lock washer (7)
and strike the tool with a hammer to
remove the lock washer (7).
A. LOWER
7
65on8s-001
Removal of carrier 2 assembly
1. Remove the sun gear 2 (15).
Caution c256ra-002
Be very careful not to get hands stuck between 3. Install 3 M12 eyebolts into the M12
gears. threaded holes on the ring gear (3) at
approximately the same distance apart,
2. Install 3 M10 eyebolts on carrier 2 (9), and then remove the housing assembly
then remove the carrier 2 assemblies (ring gear (3), housing (1), bearing (2),
(9, 10, 11, 12, 13, 14). floating seal (5), and hexagon socket
head bolt M20 x 120 (4)) while lifting it
Caution in a horizontal position.
･ Be very careful not to get hands stuck Caution
between parts or drop the suspended parts on
feet. ･ Be very careful not to get hands stuck
･ Lift the part in a horizontal position. between parts or drop the suspended parts on
feet.
･ Lift the part in a horizontal position.
9
3oitbb-001
Removal of housing assembly
1. Remove the support ring (8).
8
c256ra-001
2-91
--- Page 11 ---
A. LOWER
2. Install 3 M24 eyebolts on the housing 20
(1) and lift with a wire, align the
reference marks, and install onto the 20
ring gear (3).
A. LOWER
a
*1
f4iyzv-008
Method of applying Loctite #242
Determining the thickness of the angular
bearing shim
f4iyzv-001
Applying Loctite to the housing end surface
･ This needs to be performed when
replacing the motor (casing), housing
Caution (1), (angular) bearing (2), or lock
washer (7).
･ Be very careful not to get hands stuck Otherwise use the previous shim (6) as
between parts or drop the suspended parts on is.
feet.
1. Press the outer races of the 2 bearings
･ Lift the part in a horizontal position. (2) into the housing (1).
3. Coat the 25 M20 x 120 hexagon socket 2. Press the inner races of the 2 bearings
head bolts (4) with Loctite #242, and (2) evenly and measure the inner race
then tighten the bolts to the tightening installation width (A).
torque of 307.542 - 372.606 lbf·ft. ･ Before measuring the inner race
･ Soak the first 0.787 in. from the bolt installation width, rotate the bearings
tip in Loctite #242.(*1) at least 5 times to stabilize them.
3. Measure the bearing installation width
(B) of the motor casing.
4. Measure the lock washer groove width
(C) of the motor casing.
5. Measure the lock washer (7) thickness
(D).
･ Use the average of the
2 5 4 1 measurements of the 4 orthogonally
intersecting points on the
circumference.
Measure the dimensions with a
precision of 0.01 mm.
3 6. When the thickness of the used shim
(6) is S, gap X is as follows.
X=(B+C)-(A+D+S)
7. In the case of this unit, select 1 shim so
that gap X is -0.00314 in - 0.00079 in.
((+) indicates a gap and (-) indicates
pressing.)
f4iyzv-002
Assembly of the housing assembly
2-105
--- Page 12 ---
A. LOWER
Upper Roller
A. LOWER
c
b
d
a
g e
f
crhj98-002
* See the gauge list for measurement gauges.
Measureme
nt Standard value Usage limit
Part name Code Judgment Solution
dimension [mm (in.)] [mm (in.)]
[mm (in.)]
Acceptable/
D150 D138
a D Unacceptab
(D5.906) (D5.433)
le
Acceptable/
15 Clad by welding or
Carrier roller b - Unacceptab
(0.591) replace.
le
Acceptable/
104
c - Unacceptab
(4.094)
le
Acceptable/
D65 D64
Shaft d D Unacceptab Replace.
(D2.559) (D2.520)
le
Acceptable/
D65 D66
Bushing d D Unacceptab Replace.
(D2.559) (D2.598)
le
Acceptable/
69 68
Bushing e Unacceptab Replace.
(2.717) (2.677)
le
Acceptable/
9 8.5
Thrust plate f Unacceptab Replace.
(0.354) (0.3346)
le
2-119
--- Page 13 ---
B. C. SWING UNIT, COUNTERWEIGHT
Contents
Specifications........................................................................................................................................ 3-2
470X3.................................................................................................................................................... 3-2
Main Equipment Table.......................................................................................................................... 3-4
470X3.................................................................................................................................................... 3-4
Main Equipment Structure and Operation Explanation..................................................................... 3-5
B. C. SWING UNIT, COUNTERWEIGHT
Swing Motor.......................................................................................................................................... 3-5
Port Diagram........................................................................................................................................ 3-11
Swing Motor........................................................................................................................................ 3-11
Basic Functions.................................................................................................................................. 3-12
Swing Brake........................................................................................................................................ 3-12
Swing Lock.......................................................................................................................................... 3-13
Swing Speed Limit.............................................................................................................................. 3-14
Free Swing (option)............................................................................................................................. 3-15
Removal and Installation of Swing Unit............................................................................................ 3-16
Removal of Swing Unit........................................................................................................................ 3-16
Installation of Swing Unit.................................................................................................................... 3-18
Assembly and Disassembly of Swing Motor.................................................................................... 3-19
Causes of Trouble and Solutions........................................................................................................ 3-20
Maintenance Standard Table.............................................................................................................. 3-22
Jig....................................................................................................................................................... 3-23
Disassembly........................................................................................................................................ 3-23
Assembly............................................................................................................................................ 3-28
Swing Motor Internal Structural Diagram............................................................................................ 3-35
Assembly and Disassembly of Swing Unit....................................................................................... 3-37
Disassembly........................................................................................................................................ 3-37
Assembly............................................................................................................................................ 3-38
Assembly and Disassembly of Swing Reduction Gear................................................................... 3-40
Disassembly........................................................................................................................................ 3-40
Assembly............................................................................................................................................ 3-42
Swing Reduction Gear Structure Diagram.......................................................................................... 3-48