Caterpillar Cat 320CL Excavator (Prefix PAB) Service Repair Manual Instant Download

1
Service Repair Manual
Model 320C and 320C L 320CL Excavator
2
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Product EXCAVATOR Model 320C EXCAVATOR
PAB Configuration 320C 320C L Excavators
PAB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly 320C Excavator Machine
Systems Media Number -RENR3826-16 Publication
Date -01/11/2014
Date Updated -30/03/2016
i02044033
Track - Connect SMCS - 4170-077 Connection
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 5P-6214 Track Block Assembly 1
B 1U-7630 Impact Socket 1
C 3S-6224 Electric Hydraulic Pump (115 Volt)(1) 1
C 8T-0820 Hydraulic Pressure Gauge 1
C 3B-7722 Pipe Bushing 2
C 1P-2376 Quick Connect Coupler 2
C 1P-2377 Dust Plug 2
C 6D-7726 Hose Assembly 2
C 5P-2379 Track Press Tool Gp 1
C 8S-7172 Double Acting Cylinder
C 8S-9903 Track Press Rollover Gp
D 1P-3545 Coupler for Track Chain 1
E 1P-3533 Bar 1
F 5P-0960 Molybdenum Grease 1
G 5F-9447 Pilot Pin 1
3
(1) 8S-8033 Electric Hydraulic Pump (230 Volt) is
available.

• Illustration 1 g01036073
• Install Tooling (D) in the track link and on the
  sprocket, as shown.
• Start the machine. Move the sprocket forward
  until the track assembly is pulled up on the
  sprocket. Move the sprocket forward until the end
  of the track assembly is past a vertical line
  through the center of the sprocket. Remove
  Tooling (D).

• Illustration 2 g01036161
• Install Tooling (E) between the first bushing in
  the track link and the track shoe, as shown.
• Move the sprocket forward. Use Tooling (E) to
  guide the track assembly over the carrier
  rollers and the front idler.

4
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Illustration 3 Typical example
g01036164

1. Use a suitable lifting device to raise the front
   of the track assembly. Install Tooling (A) in
   position under the track shoe, as shown.
2. Apply Tooling (F) on two track bushings. Install
   the bushings in the track links. The grease will
   hold the bushings in place.
3. Apply Tooling (F) in the master pin bores in the
   track assembly and on the master pin.
4. Connect the ends of the track assembly. Make sure
   that the pin bore in each end of the track
   assembly is aligned with each other.

Illustration 4
g01036167
6

• Illustration 5 g00722410
• Install Tooling (G) in the track assembly. Make
  sure that Tooling (G) is centered in the track
  links. Use Tooling (G) and a hammer to install
  master pin (2).
• Note If you can not install master pin (2) with
  the hammer, use Tooling (C) to install master
  pin (2). Refer to Illustration 5.
• Install the cotter pin in the master pin. Remove
  Tooling (A) from the rear of the track assembly.
• Note Refer to Special Instruction, "Track -
  Assembly" for further information regarding
  Tooling (C).
• If the track shoe on each side of the master pin
  was removed, reinstall the track shoes. Use
  Tooling (B) to reinstall the track shoe mounting
  bolts.
• Tighten the tension of the track. Refer to
  Operation and Maintenance Manual, "Track
  Adjustment - Adjust" for the correct procedure.

Copyright 1993 - 2019 Caterpillar Inc. All
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Licensees.
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Product EXCAVATOR Model 320C EXCAVATOR
PAB Configuration 320C 320C L Excavators
PAB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly 320C Excavator Machine
Systems Media Number -RENR3826-16 Publication
Date -01/11/2014
Date Updated -30/03/2016
i01953048
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.
8
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.

• Illustration 2 g00708894
• 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.
• 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).
• Leave the suitable lifting device attached and
  turn the front idler, the recoil spring, and the
  hydraulic track adjuster around 180 degrees.

Illustration 3 g00708895 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.
9

1. Reposition the suitable lifting device in order
   to support the recoil spring and the hydraulic
   track adjuster (2).
2. Remove bolts (3) that hold the front idler to the
   recoil spring and the hydraulic track adjuster
   together.
3. Separate recoil spring and the hydraulic track
   adjuster (2) from the front idler. The front
   idler will be supported by the track frame.
4. The weight of the recoil spring and the hydraulic
   track adjuster as a unit is approximately 95 kg
   (210 lb).

• Illustration 4 g00708896
• Attach a suitable lifting device to the front
  idler (1), as shown.
• 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 Procedures" for the
  disassembly and assembly procedures for the
  idler.

Copyright 1993 - 2019 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Tue Oct 1 100415 UTC0800 2019
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Product EXCAVATOR Model 320C EXCAVATOR
PAB Configuration 320C 320C L Excavators
PAB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly 320C Excavator Machine
Systems Media Number -RENR3826-16 Publication
Date -01/11/2014
Date Updated -30/03/2016
i04294430
Recoil Spring - Disassemble SMCS -
4158-015 Disassembly Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 4C-9540 Recoil Spring Bench 1
B 146-2457 Hydraulic Power Supply Gp 1
B 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. Refer to Disassembly and
Assembly, "Front Idler, Recoil Spring and
Hydraulic Track Adjuster - Remove".
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.
11
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.
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.
Illustration 2
g00494710
12
Illustration 3 g00483437 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.

1. The combined weight of the recoil spring assembly
   is approximately 116 kg (255 lb).
2. 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).
3. Adjust the two adjustable supports in order to
   align the centerline of the recoil spring
   assembly with the centerline of Tooling (A).

13
Illustration 4 g00498760 The hoist has been
removed from the recoil spring assembly in order
to provide a better illustration of level gauge
(4). 8. Put a level gauge (4) on the recoil
spring assembly.

• Illustration 5 g00498781
• 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).
• 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.
• 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.

14
Illustration 6
g00498784
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.

• Illustration 7 g00889063
• 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.
• Remove nut (6) with Tooling (D). Release the
  force on the recoil spring assembly.

15
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).
Illustration 8 g00902471 16. Separate the
components of the recoil spring assembly. Remove
support (12), spring (10), support (9), and rod
(11).
Copyright 1993 - 2019 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Tue Oct 1 100511 UTC0800 2019
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Previous Screen
Product EXCAVATOR Model 320C EXCAVATOR
PAB Configuration 320C 320C L Excavators
PAB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly 320C Excavator Machine
Systems Media Number -RENR3826-16 Publication
Date -01/11/2014
Date Updated -30/03/2016
i06208069
Recoil Spring - Assemble SMCS -
4158-016 Assembly Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 4C-9540 Recoil Spring Bench 1
B 223-3506 Hydraulic Cylinder and Lines Gp 1
C 8S-9971 Adapter 1
D - See Recoil Spring Chart -
E - 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.
17
Note Prior to assembling the recoil spring
assembly, make sure that Tooling (A) is on a
level surface.

• Illustration 1 g03855728
• Check the condition of the threads on rod (11)
  and nut (6). If the threads are worn or damaged,
  use new parts for replacement.
• Assemble the recoil spring assembly loosely.
  Position spring (10) onto support (9). Install
  rod (11) into support (9). Position support (12).

Illustration 2
g00483426
3. Install Tooling (C) on Tooling (B).
18
Illustration 3
g00494710
Illustration 4 g00483437 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).
19

1. Fasten a suitable lifting device to the recoil
   spring assembly. Position the recoil spring
   assembly on two adjustable supports (1) in
   Tooling (A).
2. Adjust the two adjustable supports in order to
   align the centerline of the recoil spring
   assembly with the centerline of Tooling (A).

Illustration 5 g00949740 The hoist has been
removed from the recoil spring assembly in order
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.
Illustration 6 g00498784 9. Close covers (7) on
Tooling (A). Compress the recoil spring assembly
with Tooling (B).
20
Illustration 7 (X) Compressed length of the
spring.
g03855741
10. Open the covers on Tooling (A). Measure the
assembled length of the recoil spring. The
Compressed Length (X) must be set per chart
below. Table 2
Recoil Spring Length Recoil Spring Length Recoil Spring Length
Model Spring Length Socket
312E 377 0.70 mm (15 0.028inch) 386-3318
318C 432 0.70 mm (17 0.028 inch) 386-3319
320C 432 0.70 mm (17 0.028 inch) 386-3319
320D 550 1.50 mm (22 0.60 inch) 142-4216
320E 550 1.50 mm (22 0.060 inch) 142-4216
321C 440 0.7 mm (17 0.030inch) 386-3319
321D 550 1.50 mm (22 0.060 inch) 142-4216
322C 526 1.50 mm (21 0.060 inch) 142-4216
325C 640 1.0 mm (25. 0.040inch) 386-3313
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.
21

• Illustration 8 g03855744
• Apply a rust inhibitor to the threads on the end
  of the retaining rod for the recoil spring.
  Install nut (6). Tighten nut (6) with Tooling
  (D).
• Put 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.
• 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.

Copyright 1993 - 2019 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Tue Oct 1 100607 UTC0800 2019
22
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Previous Screen
Product EXCAVATOR Model 320C EXCAVATOR
PAB Configuration 320C 320C L Excavators
PAB00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly 320C Excavator Machine
Systems Media Number -RENR3826-16 Publication
Date -01/11/2014
Date Updated -30/03/2016
i01957585
Hydraulic Track Adjusters - Disassemble SMCS -
4157-015 Disassembly Procedure Start By a.
Disassemble the recoil spring. Refer to
Disassembly and Assembly, "Recoil Spring -
Disassemble".
Illustration 1
g00526451

1. Remove piston assembly (5) from cylinder (2).
2. Remove lip seal (6) from cylinder (2).

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1. Remove rod (1) from cylinder (2).
2. Remove O-ring seal (3) and backup ring (4) from
   cylinder (2).

Illustration 2 g00526453 5. Remove O-ring seals
(9), rings (8), and rings (7) from the grooves in
piston assembly (5).
Illustration 3
g00526454
6. Remove bolts (11). Remove plate (10).
Illustration 4
g00526455
25
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