Caterpillar cat 320 excavator (prefix zbn) service repair manual (zbn00001 and up)

Service Repair Manual
Models
320 Excavator

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Product: EXCAVATOR
Model: 320 EXCAVATOR ZBN
Configuration: 320 Excavator ZBN00001-UP (MACHINE) POWERED BY C7.1 Engine
Disassembly and Assembly
320GC, 320 and 323 Excavators Machine Systems
Media Number -M0080364-08 Publication Date -01/09/2018 Date Updated -12/09/2018
i06998049
Recoil Spring - Disassemble
SMCS - 4158-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 4C-9540 Recoil Spring Bench 1
B
146-2457 Hydraulic Power Supply Gp 1
223-3506 Hydraulic Cylinder and Lines Gp 1
C 8S-9971 Adapter 1
D 4C-4467 65 mm Socket 1
Start By:
a. Remove the front idler and the recoil spring assembly.
The spring of the recoil spring assembly is compressed under several
tons of force.
Do not attempt to compress or release the tension of the spring with the
nut on the end of the retaining rod.
Damaged threads on the retaining rod or nut can cause the assembly to
come apart with force, resulting in injury or death.
1. Prior to disassembling the recoil spring assembly, make sure that Tooling (A) is on a level surface.
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2019/12/10https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

2. Thoroughly clean the outside surface of the recoil spring assembly prior to disassembly.
Illustration 1 g00483426
3. Install Tooling (C) on Tooling (B), as shown.
Note: Two adjustable supports (1), reaction plate (2) and movable plate (3) are part of Tooling (A).
4. Adjust the spacing between reaction plate (2) and movable plate (3). The spacing is approximately
the same length as the recoil spring assembly (free length). Also, make sure that two adjustable
supports (1) are positioned between the reaction plate and the movable plate, as shown. Level the
two supports.
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Note: The recoil spring assembly may be installed in Tooling (A) from the end. In this case, reaction
plate (2) must be removed. Then reinstall the reaction plate after the recoil spring assembly is in
place on two adjustable supports (1).
NOTICE
Do not remove the hoist from the recoil spring assembly until the unit
is leveled, centered and locked in the specified tooling.
5. The combined weight of the recoil spring assembly is approximately 116 kg (255 lb).
6. Fasten a suitable lifting device to the recoil spring assembly. Put the recoil spring assembly in
position on two adjustable supports (1) in Tooling (A).
7. Adjust the two adjustable supports to align the centerline of the recoil spring assembly with the
centerline of Tooling (A).
The hoist has been removed from the recoil spring assembly to provide a better illustration of level gauge (4).
8. Put a level gauge (4) on the recoil spring assembly.
9. Reposition the recoil spring assembly until the recoil spring assembly is level. Reposition the recoil
spring assembly until the retaining rod and nut (6) are centered in the hole in reaction plate (2).
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10. The recoil spring assembly is leveled by moving adjustable supports (1) higher or lower. After the
recoil spring assembly is leveled and centered, install two pins (5) on the back side of reaction plate
(2), as shown.
11. Operate Tooling (B) enough to hold the recoil spring assembly in position between reaction plate (2)
and movable plate (3). Make sure that the recoil spring assembly is level and centered.
Several tons of force are required to compress the recoil spring during
assembly.
Do not compress the spring assembly until the covers on the tooling have
been closed.
It is possible for the recoil spring to twist under load and come out of the
tooling resulting in injury or death.
12. Close covers (7) on Tooling (A). Use Tooling (B) to compress the recoil spring assembly slightly.
13. Through the opening in the end of Tooling (A), remove the socket head bolts and lock strip (8) from
the end of the retaining rod.
14. Remove nut (6) with Tooling (D). Release the force on the recoil spring assembly.
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15. Open the covers on Tooling (A). Fasten a suitable lifting device to the recoil spring assembly, and
remove the recoil spring assembly from Tooling (A).
16. Separate the components of the recoil spring assembly. Remove nut (6), track adjuster (12), plate (9),
spring (10), and support (11).
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Tue Dec 10 17:50:02 UTC+0800 2019
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Product: EXCAVATOR
i06998050
Recoil Spring - Assemble
SMCS - 4158-016
Assembly Procedure
Table 1
Required Tools
A 4C-9540 Recoil Spring Bench 1
B
146-2457 Hydraulic Power Supply Gp 1
223-3506 Hydraulic Cylinder and Lines Gp 1
C 8S-9971 Adapter 1
D - Loctite 242 -
The spring of the recoil spring assembly is compressed under several
tons of force.
Do not attempt to compress or release the tension of the spring with the
nut on the end of the retaining rod.
Damaged threads on the retaining rod or nut can cause the assembly to
come apart with force, resulting in injury or death.
Note: Prior to assembling the recoil spring assembly, make sure that Tooling (A) is on a level
surface.
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1. Check the condition of the threads on track adjuster (12) and nut (6). If the threads are worn or
damaged, use new parts for replacement.
2. Assemble the recoil spring assembly loosely. Position spring (10) onto support (11). Install support
(9) onto track adjuster (12). Install track adjuster (12) into support (11).
3. Install Tooling (C) on Tooling (B).
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Note: Two adjustable supports (1), reaction plate (2), and movable plate (3) are part of Tooling (A).
4. Adjust the spacing between reaction plate (2) and movable plate (3) so that the spacing is
approximately the same length as the recoil spring assembly. Also, make sure that two adjustable
supports (1) are positioned between the reaction plate and the movable plate, as shown. Level the
two supports.
Note: The recoil spring assembly may be installed in Tooling (A) from the end. In this case, reaction
plate (2) must be removed. Then reinstall the reaction plate after the recoil spring assembly is in
place on two adjustable supports (1).
NOTICE
Do not remove the hoist from the recoil spring assembly until the unit
is leveled, centered and locked in the specified tooling.
5. The combined weight of the recoil spring assembly is approximately 116 kg (255 lb).
6. Fasten a suitable lifting device to the recoil spring assembly. Position the recoil spring assembly on
two adjustable supports (1) in Tooling (A).
7. Adjust the two adjustable supports to align the centerline of the recoil spring assembly with the
centerline of Tooling (A).
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The hoist has been removed from the recoil spring assembly to provide a better illustration of level gauge (4).
8. Operate Tooling (B) and guide the end of the recoil spring assembly through the hole in reaction
plate (2). Put a level gauge (4) on the recoil spring assembly. Make sure that the recoil spring
assembly is level and centered in Tooling (A). Remove the suitable lifting device from the recoil
spring assembly.
9. Close covers (7) on Tooling (A). Compress the recoil spring assembly with Tooling (B).
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10. Open the covers on Tooling (A). Measure the assembled length of the recoil spring. The Compressed
Length must be 550 ± 1.5 mm (22 ± 0.060 inch).
11. If the assembled length is not correct, close covers (7) on Tooling (A), and adjust the spring length
with Tooling (B). If the assembled length is correct, the assembly of the recoil spring assembly can
be completed.
12. Apply a rust inhibitor to the threads on the end of the track adjuster for the recoil spring. Install nut
(6). Tighten nut (6).
13. Put Tooling (D) on the threads of the socket head bolts that hold strip (8) in place. Install the strip
and the socket head bolts that hold the strip.
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14. Fasten a suitable lifting device to the recoil spring assembly, and remove the recoil spring assembly
from Tooling (A). The combined weight of the recoil spring assembly is approximately 116 kg
(255 lb).
End By:
a. Install the front idler and the recoil spring.
Tue Dec 10 17:50:58 UTC+0800 2019
6/6(W)w

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Product: EXCAVATOR
i06991717
Hydraulic Track Adjusters - Disassemble
SMCS - 4157-015
Disassembly Procedure
Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" M0066576
Start By:
a. Disassemble the recoil spring.
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Tue Dec 10 17:51:54 UTC+0800 2019
4/4(W)w

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Product: EXCAVATOR
i06991755
Hydraulic Track Adjusters - Assemble
SMCS - 4157-016
Assembly Procedure
Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" , M0066576
Table 1
Required Tools
A 1P-0520 Driver Group 1
B 5p-0960 Molybdenum Grease -
Note: Make sure that all the parts of the hydraulic track adjuster are clean and free of dirt and debris
prior to assembly.
1. Make sure that all the passages in the piston assembly are filled with Tooling (B). Make sure
that air is not trapped in the passages in the piston assembly.
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Note: Completely fill the seal grooves in the piston assembly with Tooling (B). The grease will
displace air when the O-ring seals and the backup rings are installed.
Note: O-ring seals and backup rings must be installed in the correct position to ensure the correct
operation of the hydraulic track adjuster. Backup rings are distinguished by the color of the ring.
Backup rings (1) are black in color. Backup rings (2) are brown in color.
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Note: Completely fill in the seal groove for the O-ring sea and the backup ring in the cylinder with
Tooling (B). The grease will displace air when the O-ring and the backup ring are installed.
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Install the lip seal until the seal is 0.5 ± 0.5 mm (0.02 ± 0.02 inch) below the surface of the cylinder.
Install the lip seal with the lip toward the outside of the cylinder.
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Put a small amount of Tooling (B) on the sliding surface of the piston assembly. Put a minimum of
60 cc (4 in3
) of Tooling (B) on the end of the piston assembly. This grease will prevent air from
displacing grease in the cylinder during the installation of the piston.
Note: It may be necessary to use a soft faced hammer to install the piston assembly into the cylinder.
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Add approximately 5 cc (.3 in3
) of Tooling (B) through the fill valve. Apply a force to the piston
assembly and open the fill valve to purge all the air from the hydraulic track adjuster.
End By:
a. Assemble the recoil spring.
Tue Dec 10 17:52:50 UTC+0800 2019
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Product: EXCAVATOR
i06991628
Sprocket - Remove and Install
SMCS - 4164-010
Removal Procedure
Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" M0066576
Table 1
Required Tools
A
8S-7640 Stand 2
8S-7611 Tube Assembly 2
8S-7615 Pin 2
B 439-3939 Link Bracket As 1
Start By:
a. Separate the track.
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Note: Adjust the height of Tooling (A) so that there is sufficient clearance between the sprocket and
the track for the removal of the sprocket from the final drive.
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