PDF Service Manual Link-Belt 80X3 Excavator - 21 MB
This is the official service manual for the Link-Belt 80X3 excavator, a vital tool for any owner or technician.
It is filled with detailed repair procedures, system schematics, and diagnostic flowcharts to help you identify and fix problems quickly.
Following the manufacturer's guidelines in this manual is the key to performing effective service and reducing equipment downtime.
Ensure your excavator is maintained to the highest standard.
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--- Page 1 ---
80X3
Excavator
SERVICE MANUAL
WLSM0806-00LX
Mar. 2013
--- Page 3 ---
SAFETY
Warning
Before starting the engine, check the safety messages in this operator's manual.
Check all the warning labels on the machine.
Check that there is no one anywhere in or around the work range for the machine.
Check the operation methods in a safe location before starting the actual work.
Understand the operation of this machine well, then operate it according to service-related laws and
ordinances.
The operator's manual and service manual can be ordered from any LBX Link-Belt dealer.
Warning
Working in untidy work clothes or in clothes with which safety cannot be ensured leads to damage to
the machine and injury of the operator themselves.
Always work dressed for safety.
In order to work more safely, it is recommended to wear additional safety gear.
(Helmet, safety shoes, earplugs, goggles, work clothes, and gloves)
Warning
Work with great care when the engine is running.
Warning
Check and verify hydraulic equipment.
Work according to the procedure.
Do not change the procedure.
Warning
When bleeding the pressure from hydraulic circuits to inspect the machine's hydraulic cylinders,
make sure that there is no one in the vicinity before doing the work.
Warning
Use gloves when handling hot parts.
Warning
Lower the parts to the ground before inspecting or repairing attachments and lower parts.
Warning
Check that all hoses and tubes are securely connected.
Replace any damaged hose or tube.
Do not use your hands to check for oil leaks. Use a piece of cardboard or wood.
Warning
When removing an attachment pin or other hard pin, use a hammer with a soft head.
Warning
When installing a pin with a hammer and working with a grinder, wear protective eyewear.
At this time, use goggles or a protector that meets the standards.
1-4
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A. LOWER
This friction plate (115) meshes with the cylinder block (104) of the hydraulic motor section.
Accordingly, brake force on the cylinder block (104) is released and the hydraulic motor is
also able to rotate freely.
104 112 116 115
1
E
323 a b
328 C
D B A
301
113
C
1885BAFD
1 Parking brake
2. During stopping
Feeding of pressurized oil to ports A or B is stopped.
The brake valve spool (323) moves to the neutral position.
Port E is cut off.
The pressure of cylinder chamber c is reduced.
If this pressure is reduced to 0.63 MPa (91.3838 psi) or below, the hydraulic pressure of the
piston (112) becomes smaller than the spring (113) force.
The piston (112) presses the partner plate (116) and friction plate (115) due to the force of the
spring (113).
This pressing force produces friction force that becomes brake force.
The friction plate (115) meshes with the cylinder block (104) of the hydraulic motor section.
2-10
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A. LOWER
Center Joint (blade)
D
G’ E
B
A. LOWER
H
C
F G
G’ A
A-
H’
H’
A’
B’
C’
D’
E’
F’
G’
G’
A
20534912
Port Port name Port size
A, A' Main port (backward right) G1/2
B, B' Main port (backward left) G1/2
C, C' Main port (forward right) G1/2
D, D' Main port (forward left) G1/2
E, E' Blade port (blade-up) G3/8
F, F' Blade port (blade-down) G3/8
Drain port *G (2 locations), G' (1
G, G' G3/8
location)
Pilot port *H (2 locations), H' (1
H, H' G1/4
location)
2-21
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A. LOWER
Removal and Installation of Upper Do not loosen the check valve all at once.
Roller Loosen it slowly while monitoring the
grease output and shoe loosening.
Job code AJJR01
Use a rag to catch grease that trickles out
of the check valve.
Warning
･ When loosening the check valve, loosen it a
little at a time and stop when any grease
appears.
The pressure inside the cylinder is very high,
so there is the danger of grease being
expelled and the plug flying off if the check
valve is loosened too much.
The check valve adjustment procedure should
not be done in front of the check valve.
Caution
･ Be sure to stop the engine before beginning
work.
Items to prepare
･ Box wrenches [19 mm (0.748 in), 24 mm
(0.945 in)] 1
･ Jack (That meets the lifting weight.)
･ Rag
･ Cleaning fluid
･ Wood planks, etc.
zf29na-002
Removal of Upper Roller
1. Use a box wrench [19 mm (0.748 in)] to 2. Use a jack (3) to lift the top of the shoe,
loosen the check valve (1) to release and then insert wood planks (4) to
grease, and then loosen the track shoe separate the shoe (2) and upper roller (1)
tension. by about 10 mm (0.394 in).
Warning 2
･ If the check valve (1) is too loose, it may fly
off.
･ Do not place your body in front.
1 4
4 3
j2kwlj-005
2-32
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[3] Disassembled parts can easily rust or [4]
collect dust. Therefore, immediately after a. Remove the O-rings (6) from the shaft
disassembling parts, take precautions to (3).
prevent the parts from rusting or b. Pull out the shaft (3) from the roller
collecting dust. (2).
A. LOWER
3. Disassembly procedure
[1] 3
a. Clean the lower roller with kerosene.
2
b. Remove the plug (9) from the collar
(8) and drain the oil. 6
6
h
9
69F0DED9
[5] Remove the floating seals (5) from the
roller (2).
14FA78C0 2
[2]
a. Remove the wire clips (7) from the
shaft (3). 5
b. Remove the collars (1) and (8) from 5
the shaft (3).
7
6A89F620
[6] Use the removal jig and press to remove
7 the bushings (4) form the roller (2).
1 3 2
8
20B41428 4
4
[3] Use the removal jig to remove the
floating seals (5) from the collars (1) and
(8).
5 745E8C91
5 [7] Parts cleaning
a. Rough cleaning
a) Insert parts into a container for
rough cleaning filled with kerosene.
1 * cClean off adhered matter that
can form sharp points and cause
scratches.
8 Immerse parts in kerosene until
32A8E4C9
adhered matter such as dust and
grease floats to the top.
2-43
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10. Use a micrometer caliper (5), cylinder
gauge (4), and caliper (6) to measure the
roller (with bushing) (1), hub (2), and shaft
(3) for wear and deformation. Replace with
new parts as necessary.
3
4
2
1
1
6
6
CA0A97FF
1
12. Invert the roller (1), use jig A (4) to push up
2 against the bushing (2), and press with a
rod-shaped object (3) (such as a shaft).
The bushing comes off.
3
1
3
6
4 2
CD449575
5
Assembly Procedures
AD47C05E
1. Clean all parts.
11. When replacing the bushing (1), remove it ･ Find a clean location.
by placing a striking rod (2) against the end ･ Place a rubber plate or cloth on the work
surface and striking that with a hammer (3) platform so as not to damage the parts.
uniformly left and right as shown in the
･ In order to clean off adhered matter that
diagram.
forms sharp points and causes
･ Be careful not to scratch the inside of the scratches, immerse parts in cleaning
roller when striking the end surface of fluid (1) until dirt and grease float to the
the bushing. top.
2-54
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Assembly and Disassembly of Center Caution
Joint
<General cautions>
Caution ･ Be careful not to drop precision parts or let
･ The following cautions for hydraulic equipment bump them with other parts during work.
A. LOWER
should be observed with these parts. ･ Do not forcefully open or hit parts in an effort
･ To ensure safe operations, wear protective to speed up operations.
gears for the work and follow all precautions. Pay careful attention and proceed slowly so as
･ When removing devices or positioning devices not to deform any parts, create any oil leaks,
at the time of installation, use a removal jig or compromise the efficiency of the equipment,
and a hammer or steel rod. etc.
･ Make sure that the jig is used for disassembly ･ Disassembled parts can easily rust or collect
of the axle and rotor. dust. Therefore, immediately after
disassembling parts, take precautions to
･ Follow the precautions below when
prevent the parts from rusting or collecting
suspending the load.
dust.
･ The liftcrane must be operated by a
･ Make sure that foreign matter such as debris
qualified operator.
and moisture does not enter.
･ Do not stand or pass under the suspended
･ The work platform used should be solid,
load.
stable, and sufficiently spacious.
･ Check the weight of the load to determine Also, items should be clean and free of debris
whether it can be carried by hand or whether and moisture.
a liftcrane must be used. Remove debris and moisture before
･ Be sure to repair any parts damaged during performing work.
disassembly, and prepare replacement parts in ･ Inspect, remove debris and moisture, and
advance. clean tools and jigs before work.
･ If any parts are significantly rusted or dirty, ･ Jigs and tools that are appropriate to the
clean them before disassembling. contents of work should be used.
･ Any foreign matter entering the equipment
during assembly can create a malfunction. Items to prepare
Therefore, after thoroughly cleaning the ･ Hexagon wrench
equipment with cleaning oil, air blow the ･ Torque wrench
equipment, and assemble in a clean location.
･ Box wrench
･ When assembling V-rings, O-rings, and other
sliding parts, be sure to coat them with new ･ Lights
grease. ･ Mirror
･ As a rule, replace all seal parts such as O- ･ Brush (plastic)
rings with new parts.
2-65
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A. LOWER
5. Use a wrench [19 mm (0.748 in.)] to install 9. To adjust the track shoe tension, raise the
the cover (8) with 4 bolts (7). lower side frame as shown in the diagram.
Place a wood plank (13) or the like under
8 the lower frame to prevent falling.
Adjust the tension so that the distance
indicated with A between the frame bottom
(14) of the center area of the lower side
frame and the lowest hanging part of the
top of the shoe plate (15) is 180 - 205 mm
(7.087 - 8.071 in.).
7
q1n8d5-006
6. Wrap the shoe (9).
13
q1n8d5-028
14
9
q1n8d5-026
7. Insert the master pin (11). A
Insert the S-pin (10) and bend it so that it
cannot slip out.
15
q1n8d5-011
10 11
q1n8d5-008
8. Tighten the check valve (12).
While monitoring the track shoe tension,
inject grease into the grease cylinder.
1
12
q1n8d5-027
2-76
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7. Removal of planetary gear (2) [2] Loosen the 2 sleeves (203).
[1] Loosen the 4 hexagon bolts (51) and
remove from the spindle (2).
A. LOWER
34F53864
[3] Loosen the 2 plugs (324).
2C6D5CDE
[2] Remove the 4 planetary gears 2 (7)
and 4 needle roller bearings with
holders (28), and 4 bearing inner races
(30).
[3] Remove the 4 thrust washers 2 (11)
from the spindle (2).
[4] Remove the thrust collar 1 (9) from the
spindle (2).
356C71BD
[4] Loosen the 2 plugs (382).
2D9590DD
8. Removal of rear flange
[1] Invert the travel motor. (motor faces up)
3A795E18
Note
[5] Loosen the 1 plug (382).
･ The next operation is to make the plugs easy
to remove when the inside of the rear flange is
disassembled.
At this time, loosen the plugs enough so that
they can be removed by hand.
･ When the inside of the rear flange is not being
disassembled, do not loosen the plugs.
4555F5DA
2-87
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[2] Replace parts if the following corresponding abnormal conditions (symptoms) are present.
Reference Permissible
value limit value
Part No. Part name Symptom
(standard (judgment
dimensions) value)
･ Significant external damage.
[1] Hub ･ Pitching on ring gear tooth surfaces. - -
･ Abnormal wear due to seizing.
･ Significant external damage.
[2] Spindle - -
･ Abnormal wear due to seizing.
[3] etc. Carrier assembly ･ Abnormal wear due to seizing. - -
[4] Sun gear 1 ･ Pitching on tooth surfaces.
[6] Sun gear 2
[5] Planetary gear 1 ･ Flaking symptoms appearing on rolling - -
[7] Planetary gear 2 surface of bearing.
[10] Thrust washer 1
･ The sliding surface is discolored or
[11] Thrust washer 2 - -
abnormally worn.
[12] Thrust washer 3
･ Indentations present.
[24] Ball bearing ･ Flaking symptoms appearing. - -
･ Uneven wear.
[27] ･ Pitching on roller.
Needle roller bearing - -
[28] ･ Abnormal wear on holder end surface.
[29] ･ Flaking symptoms appearing on rolling
Bearing inner race - -
[30] surface of bearing.
･ Scratches on surface that slides
[301] Rear flange - -
against spool [323].
･ Surface in contact with oil seal [132]
[102] Shaft worn. - -
･ Spline worn.
[103] Swash plate ･ Seizing symptoms present. - -
･ Spline section worn.
･ Significant wear on bore inner surface.
[104] Cylinder block - -
･ Scratches and wear on surface that
slides against timing plate [109].
･ Gap in axis direction of piston [105]
Piston assembly and shoe [106]. Gap 0.05 mm Gap 0.15 mm
[105] Piston
･ Abnormal wear and uneven wear on (0.00197 in.) (0.00197 in.)
[106] Shoe
shoe.
･ Uneven wear on sections that slide
against shoe [106].
[107] Retainer plate - -
･ Scratches or uneven wear on surface
that slides against thrust ball [108].
･ Uneven wear on spherical section that
[108] Thrust ball - -
slides against the retainer plate [107].
･ Seizing symptoms and uneven wear on
[109] Timing plate - -
sliding surfaces.
･ Uneven wear on both end surfaces. Braking torque Braking torque
[115] Friction plate
･ Specified torque not produced. 120 N•m 120 N•m
[116] Partner plate
･ Seizing symptoms present. (88.52 lbf・ft.) (88.52 lbf・ft.)
2-98
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A. LOWER
e. Temporarily tighten the plug (382) in [6] Install the 10 springs (113) in the rear
the rear flange (301) with the flange (301).
hexagon wrench.
Note
･ Thoroughly coat the spring (113) with grease
A. LOWER
and secure them so that they do not fall from
the rear flange (301).
96040EDF
[2] Coat the ball bearing (150) with
hydraulic oil and fit the ball bearing
(150) into the rear flange (301).
[3] Fit the parallel pin (342) in the pin hole 6A88FE4A
of the rear flange (301).
11. Connection between rear flange and
spindle
[1] Install the O-rings (43) and (44) in the
spindle (2) O-ring grooves.
Note
･ Install the O-ring (43) without applying grease.
If grease is applied for reassembly, grease
may ooze out from the matching surface of the
rear flange (301) and spindle (2) during travel
motor operation. This can be mistaken for an
6B016A0E
oil leak, so do not apply grease.
[4] Coat the surface of the timing plate
(109) that matches with the rear flange
(301) with grease.
Use the parallel pin (342) and ball
bearing (150) as a guide and install the
timing plate (109) on the rear flange
(301).
[5] Use the parallel pin (342) and ball
bearing (150) as a guide and install the
timing plate (109) on the rear flange
(301).
64AB4825
Note
･ Install the timing plate (109) until the timing [2] Fit the 2 parallel pins (42) into the
plate (109) is attached to the rear flange (301). spindle (2).
Attaching the timing plate (109) to the rear
flange (301) prevents the timing plate (109)
from falling from the rear flange (301) when
the rear flange (301) is installed on the spindle
(2).
2-109
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324 336 328 325 377 323 301 345 321 392
E E
D D
206
205
201
211
213 208
203 338 382 330 327
212
216
214 215 204 202 207
A-A
E-E
368 383 352
C-C B-B D-D
BB5A0155
Part Table
Code Part name Q'ty Code Part name Q'ty
1 Hub 1 139 O-ring 1
2-120
--- Page 16 ---
A. LOWER
Drain Volume Measurement 3. Always lay a rag (2) underneath before
Procedures removing the drain hose (1).
Preparations Use a wrench [ 27 mm ( 1.063 in. ) ] to
remove the drain hose (1).(Always install a
Measuring conditions
cap on the removed drain hose (1).)
A. LOWER
Engine speed 2000 min-1 (2000 rpm)
Mode SP mode
Oil temperature About 50°C (122.0 °F)
* Be careful.
The drain volume varies greatly with the oil
temperature.
Travel Motor Drain Volume Measurement
1. Allow the bucket (2) to touch the ground so 1
as to elevate one shoe crawler (1) as in the 2
diagram on the right. uzk9zv-003
4. Install the extension hose for measurement
(1) on the side of the motor from which the
drain hose was removed.
1
2
uzk9zv-001
2. Use a wrench [ 19 mm ( 0.748 in. ) ] to
remove the bolts (1), then remove the 1
cover (2). uzk9zv-004
Tightening torque for bolt installation：63.7
5. Prepare a waste oil can (1) and measuring
- 73.5 N・m ( 46.991 - 54.220 lbf・ft. )
container (2) and set them as in the
diagram on the right.
2
1
1
uzk9zv-002
2
uzk9zv-005
2-131
--- Page 17 ---
B. C. SWING UNIT, COUNTERWEIGHT
･ Relationship between relief valve set pressure and adjusting amount (reference)
About 9.7 MPa (1407.021 psi) /rotation
Refrain from adjusting as long as no problems have occurred.
1
8FD2622A
(Fig. 3-1) Structure of relief valve