Caterpillar Cat 326D L Excavator (Prefix PJM) Service Repair Manual (PJM00001 and up).pdf

Service Repair Manual
Models
326D L Excavator

Shutdown SIS
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Product: EXCAVATOR
Model: 326D L EXCAVATOR PJM
Configuration: 326D L Excavator PJM00001-UP (MACHINE) POWERED BY C7 Engine
Disassembly and Assembly
324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power
Unit Machine Systems
Media Number -RENR8646-22 Publication Date -01/02/2015 Date Updated -12/09/2018
i07475189
Upper Frame and Undercarriage Frame - Connect
SMCS - 4150-077; 7051-077
Connect Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A - Loctite C5A Copper Anti-Seize -
B 228-4533 Boom Cylinder Link Gp 1
C - Bar Stock 48 inch by 5 inch Round 1
D
4C-6486 Stand 1
8S-7621 Tube 2
8S-8048 Saddle 2
8S-7615 Pin 2
8S-7625 Collar 2
396-9840 Cylinder As 2
447-0910 Electric Hydraulic Pump Gp115V 1
E FT-2765 Support Beam As 1
F - Guide Bolt M24-3 by 250mm 4
G 9U-7536 Lift Stand 2
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326D L Excavator PJM00001-UP (MACHINE) POWERED BY C7 Engine(SEBP624...
2020/9/20
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447-0911 Electric Hydraulic Pump Gp 1
H - Guide Bolt M20-2.5 by 250mm 2
J 276-8831 Pin Driver 1
K - Loctite RTV Clear Silicone Sealant -
L 311-1362 Vacuum Gauge Gp 1
Illustration 1 g03794298
1. Use a suitable towing device and slowly pull the undercarriage frame assembly into position
under upper frame assembly (14). The weight of undercarriage frame assembly is
approximately 12383 kg (27300 lb).
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2. Use Tooling (D) and Tooling (G) to lower the upper structure onto the undercarriage in
increments of 13 mm (0.5 inch). The weight of the upper structure is approximately
22217 kg (48980 lb).
Note: Lower the rear of upper structure first in designated increments to clear the pinion
gear with the ring gear.
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3. Remove Tooling (F). Apply Tooling (A) to the threads of bolts (17). Install two bolts (17).
Install remaining bolts (17). Torque bolts (17) to a torque of 900 ± 100 N·m (665 ± 75 lb ft).
Install tube assembly (16).
Note: Torque for bolts (17) is 250 ± 25 N·m (184 ± 18 lb ft). Turn an additional angle of 60
± 5 degrees for 330D and 326D excavators. Refer to Service Magazine , M0083843 , "An
Improved Bolt Tightening Procedure for the Critical Joints Is Now Used on all Excavators"
for more detailed information.
4. Attach a suitable lifting device to Tooling (E) and remove Tooling (E) from Tooling (G).
The weight of Tooling (E) is approximately 249 kg (550 lb).
At operating temperature, the hydraulic oil is hot and under pressure.
Hot oils can cause burns.
To prevent possible personal injury, release the pressure in the work
tool hydraulic circuit (boom, stick, bucket, and swing), travel circuits,
4/7
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and the hydraulic oil tank at the filler cap before any hydraulic lines or
components are disconnected or removed.
Remove the filler cap only when the engine is stopped and the filler cap
is cool enough to touch.
5. Install clamp (13), retaining ring (12), and bracket (11). Connect hoses (10).
6. Attach a suitable lifting device to Tooling (B). Tooling (B) weights approximately 332 kg
(732 lb). Remove plate (7) and bolts (6).
7. Attach a suitable lifting device to boom cylinder (8). Boom cylinder (8) weights
approximately 380 kg (840 lb). Using Tooling (J) to drive pin (9).
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8. Install plate (7) and bolts (6). Install grease hose assembly (5).
9. Remove cover assembly (2). Install ring gear (4) and bolts (3) into cover assembly (2).
Apply Tooling (K) onto cover assembly (2). Fill final drive with oil. Refer to Operation and
Maintenance Manual, "Final Drive - Oil Change".
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10. The planetary gear group is being held onto the sprocket housing only by Tooling (H). The
approximate weight of the planetary group is 163 kg (360 lb). Be careful not to allow the
planetary gear group to slide outward.
11. Install cover assembly (2). Install bolts (1). Remove Tooling (H). Install remaining bolts (1).
Tighten bolts (1).
12. Fill each final drive. Refer to Operation and Maintenance Manual, "Final Drive Oil -
Change".
End By:
a. Install the bucket.
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All Rights Reserved.
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Sun Sep 20 08:02:11 UTC+0800 2020
7/7
2020/9/20

Shutdown SIS
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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
1/6
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(1)
Used with M42 flat sided nut.
(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.
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.
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).
3/6
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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.
4/6
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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).
Sun Sep 20 08:03:06 UTC+0800 2020
6/6
2020/9/20

Shutdown SIS
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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)
1/7
2020/9/20

M64 5S-6086
(1)
Used with M42 flat sided nut.
(2)
(3)
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.
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).
2/7
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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
3/7
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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.
Sun Sep 20 08:04:02 UTC+0800 2020
7/7
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Shutdown SIS
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Product: EXCAVATOR
i02606369
Final Drive - Disassemble
SMCS - 4050-015
S/N - A3R1-UP
S/N - AZP1-UP
S/N - BFC1-UP
S/N - BYS1-UP
S/N - CZF1-UP
S/N - DBH1-UP
S/N - DJF1-UP
S/N - DTZ1-UP
S/N - EBM1-UP
S/N - EJC1-UP
S/N - GBR1-UP
S/N - GPB1-UP
S/N - GPK1-UP
S/N - JAT1-UP
S/N - JHJ1-UP
S/N - JJG1-UP
1/12
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S/N - JZR1-UP
S/N - KBE1-UP
S/N - LAB1-UP
S/N - LAL1-UP
S/N - MCL1-UP
S/N - MNB1-UP
S/N - MND1-UP
S/N - NAC1-UP
S/N - PJM1-UP
S/N - PKE1-UP
S/N - PYT1-UP
S/N - RSK1-UP
S/N - SCR1-UP
S/N - SCY1-UP
S/N - SYM1-UP
S/N - T2D1-UP
S/N - T2S1-UP
S/N - TPM1-UP
S/N - TRH1-UP
S/N - TSN1-UP
S/N - TZL1-UP
S/N - WDK1-UP
S/N - XDB1-UP
S/N - YFW1-UP
Disassembly Procedure
Table 1
2/12
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Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 138-7573 Link Bracket 2
C 154-6181 Forcing Screw 1
D 138-7574 Link Bracket 2
E
5F-7366 Forcing Screw 1
1P-5546 Crossblock 1
1U-9889 Crossblock 1
1P-0520 Driver Group 1
6V-7888 Puller Leg 2
1H-3112 Puller Assembly 1
1P-5551 Adjustable Screw Assembly 1
F 1U-8846 Gasket Sealant 1
Start By:
a. Remove the final drive. Refer to Disassembly and Assembly, "Final Drive - Remove".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of
the component should be thoroughly cleaned. This will prevent dirt from entering the
internal mechanism.
1. Put an alignment mark across the sections of the final drive for assembly purposes. The
parts must be reinstalled in the part's original locations.
2. Fasten the final drive to Tooling (A), as shown. The combined weight of the final drive and
final drive sprocket is approximately 312 kg (688 lb).
3/12
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3. Remove bolts (1) and the washers that hold the cover in position.
4. Remove the setscrews from the cover. Fasten Tooling (B) and a suitable lifting device to
cover (2), as shown. The weight of cover (2) is approximately 32 kg (70 lb). Remove cover
(2).
5. Remove thrust plate (3) from cover (2).
6. Remove plugs (4) from cover (2).
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7. Remove O-ring seals (5) from both plugs (4) that were in the cover.
8. Remove spacer (6) from carrier assembly (7).
9. Remove sun gear (8) from carrier assembly (7).
10. Remove carrier assembly (7) by lifting the carrier assembly straight up. The weight of
carrier assembly (7) is approximately 14 kg (30 lb).
11. Disassemble carrier assembly (7), as follows.
a. Drive spring pin (10) into planetary shaft (9) with a hammer and a punch.
5/12
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Caterpillar Cat 326D L Excavator (Prefix PJM) Service Repair Manual (PJM00001 and up).pdf

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