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Internal Parts of CAT M318C Wheeled Excavator Swing Reduction Gearbox
This swing reduction gearbox is a core power transmission component for CAT M318C wheeled excavators, built with a multi-stage planetary gear system and heavy-duty internal parts to deliver stable, high-torque rotation for the upper structure.
Key Internal Components
Swing Input Shaft: Connects directly to the swing motor, transferring hydraulic power into the gearbox with precision splines for zero-slip power delivery.
Planetary Gear Set (Multi-stage): Includes sun gears, planetary gears, and planetary carriers. The high-strength alloy gears provide large torque multiplication and smooth speed reduction, enabling precise and stable upper-structure rotation.
Internal Gear Ring: A rigid, precision-machined ring gear that meshes with planetary gears, forming the core reduction mechanism and bearing heavy radial and axial loads.
Swing Drive Pinion (155-0867): The final output gear that meshes with the swing bearing, converting gearbox torque into controlled rotational motion of the excavator's upper frame.
Heavy-Duty Bearings: Tapered roller and cylindrical roller bearings support high radial/axial loads, ensuring low friction, long service life, and stable operation under continuous heavy-duty use.
Swing Brake Assembly: Built-in multi-disc brake components (brake discs, plates, and pistons) provide reliable parking and emergency braking, preventing uncontrolled swinging.
Seals & Gaskets: High-performance oil seals and gaskets prevent hydraulic oil leakage and block dust, mud, and water ingress, maintaining internal lubrication and component cleanliness.
Gearbox Housing: A robust cast housing that encloses and protects all internal parts, with precise mounting interfaces for stable integration with the excavator's frame.
Performance & Application
All parts are manufactured to CAT original specifications, using wear-resistant alloy steel and precision machining. They ensure reliable operation in construction, municipal engineering, and material handling scenarios, supporting smooth, accurate, and durable swing performance for the CAT M318C wheeled excavator.
Product Specifications
Product Name
Excavator HOUSING AS-SWING
Place of Origin
Guangzhou China
Compatible Models
M318C/M320M322D
Part Numbers
155-0864
Shipping Methods
By Sea, By Air or By Express
Delivery Time
Within 2 days after receiving payment
Product Images
Travel Motor Parts Breakdown
#
Part No.
Description
Qty
1
155-0856
[1] SHAFT
1
2
155-0857
[3] GEAR-PLANETARY (33-TEETH)
3
3
155-0858
[1] CARRIER
1
4
155-0824
[3] PIN
3
5
082-3084
[6] WASHER
6
6
082-3085
[6] WASHER
6
7
132-4292
[63] BEARING AS-NEEDLE
63
8
095-0919
[3] RING-RETAINING
3
9
155-0864
[1] HOUSING AS-SWING
1
10
155-0865
[1] SEAL-LIP TYPE
1
11
155-0866
[1] SEAL
1
12
155-0867
[1] PINION
1
13
155-0868
[1] WASHER (100X169X2-MM THK)
1
14
155-0869
[1] BEARING AS-ROLLER
1
15
155-0870
[1] BEARING AS-ROLLER
1
16
179-3152
[2] NUT-SLOTTED
2
17
155-0872
[1] RING
1
19
155-0874
[1] CARRIER-PLANETARY
1
20
155-0875
[4] GEAR-PLANETARY (32-TEETH)
4
21
155-0876
[4] BEARING AS-ROLLER
4
22
9X-0656
[4] RING
4
23
8U-5005
[3] SHIM (1-MM THK)
3
24
095-0928
[1] RING-RETAINING
1
25
121-8088
[2] BALL BEARING
2
26
155-0877
[1] GEAR-SUN (19-TEETH)
1
27
098-2982B
[4] SHIM (1.5-MM THK)
4
28
110-4737
[2] RING-RETAINING
2
29
155-0878
[1] HOUSING-BRAKE
1
30
155-0849
[1] ORIFICE
1
31
8T-4139M
[4] BOLT (M12X1.75X30-MM)
4
32
222-5793
[1] SEAL-O-RING
1
33
155-0850
[1] PISTON
1
34
155-0851
[1] SEAL-LIP TYPE
1
35
155-0852
[1] SEAL-LIP TYPE
1
36
179-3151
[1] SPRING
1
37
179-3154
[1] SHIM (3.5-MM THK)
1
38
132-4268
[5] DISC-CLUTCH (1.7-MM THK)
5
39
132-4262
[6] DISC-CLUTCH (1.4-MM THK)
6
40
132-4263
[1] DISC-CLUTCH (1.2-MM THK)
1
41
132-4265
[1] DISC-CLUTCH (1.6-MM THK)
1
42
132-4266
[1] DISC-CLUTCH (1.8-MM THK)
1
43
9X-6574
[1] RING-RETAINING
1
44
155-0855
[1] SLEEVE
1
45
8T-0707
[1] RING-RETAINING (INTERNAL)
1
46
222-5792
[1] SEAL-O-RING
1
47
197-6054
[1] WASHER (63.6X70X0.5-MM THK)
1
Warehouse & Inventory Capacity
Our facility includes over 4000 square meters of three-dimensional warehouse space plus 2000 square meters of outdoor storage, ensuring adequate inventory levels and rapid response to customer requirements. Fast delivery is our competitive advantage.
Frequently Asked Questions
Can I order a sample for testing first?
Yes, we welcome sample orders for testing and evaluation.
How do I place an order?
Simply provide the model and quantity you need. We will issue a proforma invoice, and upon payment confirmation, your order will be processed. Preparation time varies based on order complexity.
Do you have your own factory?
Yes, we operate our own manufacturing facility with 23 years of specialized experience in the excavator gear industry.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Trading Company
Year Established:
2000
Total Annual:
10 million-15 million
Employee Number:
>150
Ecer Certification：
Verified Supplier
TGFQ, manufacturing and trading combo, specializes in excavator gear parts and gearbox more than 20 years with professional team since 2000. After twenty years’ effort and development, now we have become one the leader manufacturers and suppliers in China.
TGFQ's main pro... TGFQ, manufacturing and trading combo, specializes in excavator gear parts and gearbox more than 20 years with professional team since 2000. After twenty years’ effort and development, now we have become one the leader manufacturers and suppliers in China.
TGFQ's main pro...
