This document provides instructions for removing and installing the boom cylinder on a 320D and 320D L excavator. It outlines the required tools and safety precautions. The removal process involves releasing hydraulic pressure, removing attachment points, and lifting the cylinder out of place. Reinstallation is the reverse of removal. Torque specifications are provided for correct assembly.
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𝘼𝙣𝙩𝙞𝙦𝙪𝙚 𝙋𝙡𝙖𝙨𝙩𝙞𝙘 𝙏𝙧𝙖𝙙𝙚𝙧𝙨 𝙞𝙨 𝙫𝙚𝙧𝙮 𝙛𝙖𝙢𝙤𝙪𝙨 𝙛𝙤𝙧 𝙢𝙖𝙣𝙪𝙛𝙖𝙘𝙩𝙪𝙧𝙞𝙣𝙜 𝙩𝙝𝙚𝙞𝙧 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨. 𝙒𝙚 𝙝𝙖𝙫𝙚 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙥𝙡𝙖𝙨𝙩𝙞𝙘 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙪𝙨𝙚𝙙 𝙞𝙣 𝙖𝙪𝙩𝙤𝙢𝙤𝙩𝙞𝙫𝙚 𝙖𝙣𝙙 𝙖𝙪𝙩𝙤 𝙥𝙖𝙧𝙩𝙨 𝙖𝙣𝙙 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙛𝙖𝙢𝙤𝙪𝙨 𝙘𝙤𝙢𝙥𝙖𝙣𝙞𝙚𝙨 𝙗𝙪𝙮 𝙩𝙝𝙚 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙛𝙧𝙤𝙢 𝙪𝙨.
Over the 10 years, we have gained a strong foothold in the market due to our range's high quality, competitive prices, and time-lined delivery schedules.
2. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320D L EXCAVATOR DHK
Configuration: 320D & 320D L Excavators DHK00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320D Excavator Machine Systems
Media Number -RENR8614-14 Publication Date -01/05/2013 Date Updated -19/07/2017
i07316669
Boom Cylinder - Remove and Install
SMCS - 5456-010
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 4C-9485 Pin Driver Cap 1
Cylinders equipped with lock valves can remain pressurized for very
long periods of time, even with the hoses removed.
Failure to relieve pressure before removing a lock valve or
disassembling a cylinder can result in personal injury or death.
Ensure all pressure is relieved before removing a lock valve or
disassembling a cylinder.
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting, and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
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3. Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat®
products.
Dispose of all fluids according to local regulations and mandates.
1. Fully extend the bucket cylinder. Fully extend the stick cylinder. Lower the boom until the
stick assembly is in contact with the ground.
2. Release the pressure in the hydraulic system. Refer to Disassembly and Assembly, "Hydraulic
System Pressure - Release".
Illustration 1 g01217839
Illustration 2 g01217840
3. Loosen nut (1). Turn bolt (2) counterclockwise to release the pressure in the cylinder.
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4. Illustration 3 g01217850
4. Remove bolts (3).
Illustration 4 g01217906
5. Remove clamps (4).
Illustration 5 g01217908
6. Remove bolts (6) and support assemblies (5).
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5. Illustration 6 g01217912
7. Remove bolts (7) and reposition tube assembly (8) out of the way.
Illustration 7 g01217915
8. Remove bolts (9) and reposition valve assembly (10) out of the way.
Illustration 8 g01217921
9. Attach a suitable lifting device to boom cylinder (11). The weight of boom cylinder (11) is
approximately 287 kg (632 lb).
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6. Illustration 9 g01217928
10. Remove bolts (12) and plate (13). Remove spacer (14) (not shown).
Illustration 10 g01218003
Illustration 11 g01218010
11. Attach Tooling (A) to pin (15). Use a suitable driver to reposition pin (15). Remove shim (16).
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7. Illustration 12 g01218011
12. Lower boom cylinder (11) onto suitable cribbing and attach a suitable lifting device to boom
cylinder (11), as shown. The weight of boom cylinder (11) is approximately 287 kg (632 lb).
Illustration 13 g01218013
13. Remove bolt (18). Remove pin assembly (19) and shims (17). Remove boom cylinder (11).
Disassembly and Assembly Information
Table 2
Required Tools
Tool Part Number Part Description Qty
B 127-4904 Hydraulic Cylinder Repair Stand Gp 1
C 7M-7456 Bearing Mount Compound 1
D 1P-0808 Multipurpose Grease 1
E 195-4609 Seal Pick 1
F 3S-6224 Electric Hydraulic Pump Gp 1
6V-3175 Double Acting Cylinder 1
9S-5564 Pin Puller Sleeve As 1
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8. 9U-6832 Nut 1
4C-9634 Puller Stud 1
9U-5338 Bearing Puller Adapter 1
G
3S-6224 Electric Hydraulic Pump Gp 1
6V-3175 Double Acting Cylinder 1
9S-5564 Pin Puller Sleeve As 1
9U-6832 Nut 1
4C-9634 Puller Stud 1
9U-5339 Bearing Puller Adapter 1
Cylinders equipped with lock valves can remain pressurized for very
long periods of time, even with the hoses removed.
Failure to relieve pressure before removing a lock valve or
disassembling a cylinder can result in personal injury or death.
Ensure all pressure is relieved before removing a lock valve or
disassembling a cylinder.
Illustration 14 g01218033
Note: Tooling (F) is used for the removal and installation of bearing (8). Tooling (G) is used for the
removal and installation of bearing (2).
Refer to Table 3 for the correct torque specification for piston (3).
Refer to Table 3 for the correct torque specification for bolts (1).
Table 3
Torque Table
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9. Piston or
Lock Nut
Piston / Lock Nut
Thread Size
Piston / Lock Nut (3) Torque
Specification
Head Bolts (1) Torque
Specification
Lock Nut M64
5900 ± 300 N·m
(4352 ± 221 lb ft)
460 ± 60 N·m
(339 ± 44 lb ft)
Piston M65
5460 ± 260 N·m
(4027 ± 192 lb ft)
267 ± 40 N·m
(197 2 ± 30 lb ft)
Lock Nut M72
7400 ± 370 N·m
(5458 ± 273 lb ft)
460 ± 60 N·m
(339 ± 44 lb ft)
Piston M75
7890 ± 395 N·m
(5819 ± 291 lb ft)
367 ± 55 N·m
(270 ± 40 lb ft)
Piston M80
8900 ± 445 N·m
(6564 ± 328 lb ft)
367 ± 55 N·m
(270 ± 40 lb ft)
Lock Nut M80
7900 ± 400 N·m
(5827 ± 295 lb ft)
800 ± 100 N·m
(590 ± 74 lb ft)
Piston M85
10000 ± 500 N·m
(7376 ± 368 lb ft)
520 ± 78 N·m
(384 ± 58 lb ft)
Piston and
Lock Nut
Piston is M75
980 to 1176 N·m
(722 to 867 lb ft) 333 to 352 N·m
(245 to 260 lb ft)
Lock Nut is M62
1862 to 1960 N·m
(1373 to 1446 lb ft)
Tighten the setscrew that retains nut (3) to a torque of 57 ± 11 N·m (42 ± 8 lb ft).
The slit of ring (5) must be in the direction of the piston.
Apply Tooling (D) to seals (4) prior to assembly.
Lubricate seals (6) with the lubricant that is being sealed.
Apply Tooling (C) to the wiper seal (7) prior to assembly.
Installation Procedure
Table 4
Required Tools
Tool Part Number Part Description Qty
A 4C-9485 Pin Driver Cap 1
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10. Illustration 15 g01218011
1. Attach a suitable lifting device to boom cylinder (11), as shown. The weight of boom cylinder
(11) is approximately 287 kg (632 lb). Position boom cylinder (11) onto the machine.
Illustration 16 g01218013
2. Install shims (17) and pin assembly (19) on the head end of boom cylinder (11). Install bolt
(18).
Illustration 17 g01217921
3. Use the suitable lifting device to position boom cylinder (11) onto suitable cribbing. Reposition
the suitable lifting device near the rod end of boom cylinder (11). The weight of boom cylinder
(11) is approximately 287 kg (632 lb). Use the suitable lifting device to raise the rod end of
boom cylinder (11) into position.
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11. Illustration 18 g01218505
Illustration 19 g01217928
4. Install shim (16). Position pin (15) through the rod end of the boom cylinder.
5. Install spacer (14) (not shown). Install plate (13) and bolts (12).
Illustration 20 g01217915
6. Position valve assembly (10) and install bolts (9).
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12. Illustration 21 g01217912
7. Position tube assembly (8) and install bolts (7).
Illustration 22 g01217908
8. Install support assemblies (5) and bolts (6).
Illustration 23 g01217906
9. Install clamps (4).
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13. Illustration 24 g01217850
10. Install bolts (3).
Illustration 25 g01217839
Illustration 26 g01217840
11. Turn bolt (2) clockwise into the original position. Tighten nut (1).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat Jan 25 17:19:09 UTC+0800 2020
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14. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320D L EXCAVATOR DHK
Configuration: 320D & 320D L Excavators DHK00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320D Excavator Machine Systems
Media Number -RENR8614-14 Publication Date -01/05/2013 Date Updated -19/07/2017
i02462986
Boom - Remove
SMCS - 6501-011
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 4C-9485 Pin Driver Cap 1
B 1U-9202 Lever Puller Hoist 1
C
3S-6224 Electric Hydraulic Pump Gp 1
141-1785 Receiving Sleeve 1
9U-6811 Puller Stud 1
9U-6809 Nut 1
6V-0113 Double Acting Cylinder 1
Start By:
A. Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic
System Pressure - Release".
B. Remove the stick. Refer to Disassembly and Assembly, "Stick - Remove".
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15. Illustration 1 g01212856
1. Disconnect grease hose assembly (1) from boom cylinder (3). Remove bolts (2). Remove
the retainer plate and spacer (4).
Illustration 2 g01212871
Illustration 3 g01212838
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16. 2. Attach a suitable lifting device to boom cylinder (3). The weight of boom cylinder (3) is
approximately 287 kg (633 lb). Install Tooling (A) into pin (5). Use a hammer to drive pin
(5) out of boom cylinder (3). Lower boom cylinder (3) .
Note: Remove any shims that may be present. Mark the shims for installation purposes.
3. Repeat Steps 1 through 2 for the other boom cylinder.
Illustration 4 g01212891
4. Remove bolts (6). Remove cover (7) .
Illustration 5 g01212899
5. Remove three bolts (8). Remove step (9) .
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17. Illustration 6 g01212931
Illustration 7 g01212925
6. Open cover (10) of the storage box. Remove bolts (13). Remove bolts (12) and remove
handhold (11) .
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18. Thank you very much for
your reading. Please Click
Here. Then Get COMPLETE
MANUAL. NO WAITING
NOTE:
If there is no response to
click on the link above,
please download the PDF
document first and then
click on it.
19. Illustration 8 g01228933
7. Position retainer plate (4) and bolts (2) onto each side of pin (5). Attach a suitable lifting
device to each side of pin (5) .
Illustration 9 g01217554
Illustration 10 g01212951
8. Attach a suitable lifting device to pin assembly (15). The weight of pin assembly (15) is
approximately 48 kg (105 lb). Install pin assembly (15) and install bolt (16) .
9. Attach Tooling (B) and a suitable lifting device to boom (14) and pin assembly (15). The
combined weight of boom (14) and the stick cylinder is between 1500 kg (3300 lb) and
3016 kg (6650 lb). Apply slight lifting tension to boom (14) .
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21. Illustration 14 g01212983
12. Remove bolt (24). Attach a suitable lifting device to Tooling (C). The weight of Tooling (C)
is approximately 136 kg (300 lb). Attach Tooling (C) to pin assembly (23). Use Tooling (C)
in order to remove pin assembly (23). The combined weight of Tooling (C) and pin
assembly (23) is approximately 215 kg (475 lb).
13. Remove the boom. Remove any shims that may be present.
Note: Note the locations of any shims for assembly purposes.
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat Jan 25 17:20:04 UTC+0800 2020
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22. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320D L EXCAVATOR DHK
Configuration: 320D & 320D L Excavators DHK00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320D Excavator Machine Systems
Media Number -RENR8614-14 Publication Date -01/05/2013 Date Updated -19/07/2017
i07137701
Boom Bearings and Seals - Remove and Install
SMCS - 6501-010-SA; 6501-010-BD
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A
350-7768 Electric Hydraulic Pump Gp (115V) -1
350-7769 Electric Hydraulic Pump Gp(230V) -
4C-9634 Puller Stud 1
9U-6832 Nut 1
5P-8712 Bushing 1
316-1489 Double Acting Cylinder 1
134-8469 Spacer 1
9U-5338 Bearing Puller Adapter 1
Start By:
a. Remove the boom. Refer to Disassembly and Assembly, "Boom - Remove".
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