Caterpillar cat 320 d excavator (prefix mde) service repair manual (mde00001 and up)

Service Repair Manual
Models
320D and 320D L Excavator

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Product: EXCAVATOR
Model: 320D L EXCAVATOR MDE
Configuration: 320D & 320D L Excavators MDE00001-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
i04552524
Front Idler, Recoil Spring and Hydraulic Track Adjuster -
Remove
SMCS - 4157-011; 4158-011; 4159-011
Removal Procedure
Start By:
a. Separate the track assemblies. Refer to Disassembly and Assembly, "Track - Separate".
Illustration 1 g00708892
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.
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Damaged threads on the retaining rod or nut can cause the assembly to
come apart with force, resulting in injury or death.
1. Use a pry bar and move the front idler (1), the recoil spring, and the hydraulic track adjuster
partially out of the track roller frame. Attach a suitable lifting device to front idler (1), as
shown.
2. Once front idler (1), the recoil spring, and the hydraulic track adjuster (2) is partially out of
the track frame reposition the suitable lifting device in order to support the recoil spring, the
hydraulic track adjuster, and the front idler.
3. Slide the front idler, the recoil spring, and the hydraulic track adjuster (2) out of the track
roller frame as one unit. The weight of the unit is approximately 204 kg (450 lb).
4. Leave the suitable lifting device attached and turn the front idler, the recoil spring, and the
hydraulic track adjuster around 180 degrees.
5. Install the front idler partially into the track frame. The front idler, the recoil spring, and the
hydraulic track adjuster will be supported by the track frame.
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6. Reposition the suitable lifting device in order to support the recoil spring and the hydraulic
track adjuster (2).
7. Remove bolts (3) that hold the front idler to the recoil spring and the hydraulic track
adjuster together.
8. Separate recoil spring and the hydraulic track adjuster (2) from the front idler. The front
idler will be supported by the track frame.
9. The weight of the recoil spring and the hydraulic track adjuster as a unit is approximately
95 kg (210 lb).
10. Attach a suitable lifting device to the front idler (1), as shown.
11. Remove the front idler from the track roller frame. The weight of the front idler is
approximately 109 kg (240 lb).
Reference: Refer to Undercarriage Reconditioning Bulletin, SEBF8495, "Hydraulic Excavator
Idler Disassemble and Assembly" for the proper procedures.
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All Rights Reserved.
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Fri Jan 31 23:53:25 UTC+0800 2020
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Product: EXCAVATOR
i04552540
Front Idler, Recoil Spring and Hydraulic Track Adjuster -
Install
SMCS - 4157-012; 4158-012; 4159-012
Installation Procedure
1. Be sure that the mating surfaces on the front support for the recoil spring are clean and free
of dirt and debris prior to assembly. Be sure that the mating surfaces on the two bearings for
the front idler are clean and free of dirt and debris prior to assembly.
2. Attach a suitable lifting device to the front idler (1), as shown. Install the front idler in the
track roller frame. The weight of front idler is approximately 109 kg (240 lb).
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3. Attach a suitable lifting device to the recoil spring and the hydraulic track adjuster (2).
4. Put the recoil spring and the hydraulic track adjuster (2) in position on the front idler.
5. Install bolts (3). Tighten bolts (3) to a torque of 240 ± 40 N·m (177 ± 30 lb ft).
6. Fasten a suitable lifting device to the front idler, the recoil spring, and the hydraulic track
adjuster.
7. Turn the front idler and the recoil spring around 180 degrees. The weight of the unit is
approximately 204 kg (450 lb).
8. Slide the front idler (1), the recoil spring, and the hydraulic track adjuster (2) partially into
the track roller frame.
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9. Remove the suitable lifting device around the hydraulic track adjuster. Keep the suitable
lifting device around the front idler (1), as shown.
10. Use a pry bar in order to slide the front idler into the final position inside the track roller
frame.
End By:
a. Connect the track assemblies. Refer to Disassembly and Assembly, "Track - Connect".
Fri Jan 31 23:54:21 UTC+0800 2020
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Product: EXCAVATOR
i06889712
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
Table 2
Required Sockets
Thread Socket Part Number
M36 138–5189
M42
4C-4467
193–8100 (1)
M48
5S-6081
FT-3033 (2)
371–1080 (3)
M64 5S-6086
(1)
Used with M42 flat sided nut.
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(2)
Used with M48 flat sided nut that is 54 mm (2.13 inch) between the two flats.
(3)
Start By:
a. Remove the front idler and the recoil spring assembly.
tons of force.
1. Prior to disassembling the recoil spring assembly, make sure that Tooling (A) is on a level
surface.
2. Prior to disassembling the recoil spring thoroughly clean the outside surface.
3. Install Tooling (C) on Tooling (B), as shown.
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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). 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.
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).
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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).
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) to hold the recoil spring assembly in position between reaction plate
(2) and movable plate (3) (not shown). Make sure that the recoil spring assembly is level
and centered.
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12. Close covers (7) on Tooling (A). Use Tooling (B) to compress the recoil spring assembly
slightly.
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.
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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). Refer to Table 2 for the correct socket part number. Release the force on
the recoil spring assembly.
15. Open the covers on Tooling (A). Attach 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 support (12), spring (10),
support (9), and rod (11).
Fri Jan 31 23:55:17 UTC+0800 2020
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Product: EXCAVATOR
i06889768
Recoil Spring - Assemble
SMCS - 4158-016
Assembly 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
E 9S-3263 Thread Lock Compound 1
Table 2
Required Sockets
Thread Socket Part Number
M36 138–5189
M42
4C-4467
193–8100 (1)
M48
5S-6081
FT-3033 (2)
371–1080 (3)
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M64 5S-6086
(1)
Used with M42 flat sided nut.
(2)
(3)
tons of force.
Note: Prior to assembling the recoil spring assembly, make sure that Tooling (A) is on a
level surface.
1. Check the condition of the threads on rod (11) 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 (9). Install
rod (11) into support (9). Position support (12).
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3. Install Tooling (C) on Tooling (B).
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
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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. 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. 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.
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Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
9. Close covers (7) on Tooling (A). Compress the recoil spring assembly with Tooling (B).
(X) Compressed length of the spring
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10. Open the covers on Tooling (A). Measure the compressed length of the recoil spring. The
compressed length is Dimension (X). Refer to Table 3 for the correct compressed spring
length.
Table 3
Recoil Spring Compressed Length
Model Dimension (X)
315D 448.0 mm (17.64 inch)
319D 550.0 mm (21.65 inch)
320D 550.0 mm (21.65 inch)
323D
550.0 mm (21.65 inch)
686.0 mm (27.01 inch)(1)
324D 606.0 mm (23.86 inch)
325C 551.0 mm (21.69 inch)
325D
686.0 mm (27.01 inch)
845.0 mm (33.27 inch)(2)
326D L 606.0 mm (23.86 inch)
328D 644.0 mm (25.35 inch)
329D 686.0 mm (27.01 inch)
330D
644.0 mm (25.35 inch)
785.0 mm (30.91 inch)(3)
336D
644.0 mm (25.35 inch)
785 mm (30.91inch)(4)
(1)
This Dimension is for (S/N: DKW1-Up; SED1-Up; NES1-Up)
(2)
This Dimension is for (S/N: GBR1-Up; MCL1-Up)
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(3)
This Dimension is for (S/N: ERN1-Up)
(4)
This Dimension is for (S/N: DTS1-Up; LMG1-Up; JWR1-Up)
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, then assembly of the recoil
spring assembly can be completed.
12. Apply a rust inhibitor to the threads on the end of the retaining rod for the recoil spring.
Install nut (6). Tighten nut (6). Refer to Table2 for the correct socket part number.
13. Apply Tooling (E) 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.
14. Attach a suitable lifting device to the recoil spring assembly, and remove the recoil spring
assembly from Tooling (A). The weight of the recoil spring assembly is approximately
116 kg (255 lb).
End By:
a. Install the front idler and the recoil spring.
Fri Jan 31 23:56:13 UTC+0800 2020
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Product: EXCAVATOR
i07468682
Hydraulic Track Adjusters - Disassemble
SMCS - 4157-015
Disassembly Procedure
Start By:
a. Disassemble the recoil spring.
1. Remove piston assembly (5) from cylinder (2). Remove rod assembly (1) from cylinder (2). Remove
seal assembly (6) from cylinder (2)
2. Remove O-ring seal (4) and backup ring (3) from cylinder (2).
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Caterpillar cat 320 d excavator (prefix mde) service repair manual (mde00001 and up)

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Caterpillar cat 320 d excavator (prefix mde) service repair manual (mde00001 and up)