🚜 Caterpillar 320D Excavator

Complete hydraulic system specifications and replacement parts

Operating Weight

20.9 Ton

Engine Power

103 kW

Bucket Capacity

0.9 - 1.1 m³

Max Digging Depth

6,710 mm

🛢️ Hydraulic Pump Main Pump

Original Caterpillar Pump

Part Number: 272-6955 / SBS120

Type: Variable Displacement Piston Pump

Flow Rate: 2 x 120 L/min

Max Pressure: 35 MPa

✅ Haichen Replacement Pump

Model: HC-SBS120

Interchangeability: 100% OEM Compatible

Warranty: 12 months

Delivery: 24 hours for stock items

Specification	Value
Pump Type	Axial Piston Pump
Displacement	2 x 100 cc/rev
Rated Speed	2,000 rpm
Control Type	Load Sensing (LS)

⚠️ 重要提示

以上零件型号仅供参考。不同年份、不同区域的同款机型，泵型号可能有所不同。

请通过WhatsApp联系我们，提供您的机器铭牌或旧泵照片，我们将为您确认准确型号！

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🔧 Hydraulic Valves Control Valves

Main Control Valve

OEM Part: 723-47-20401

Sections: 7 Spool

Type: Proportional Control

Haichen Replacement: HC-MCV-PC200

Solenoid Valves

Type: YUKEN DSG-03 Compatible

Voltage: DC24V

Pressure: 31.5 MPa

Haichen Replacement: HC-DSG-03-2B2

Relief Valves

Main Relief: 723-30-92100

Setting: 34.3 MPa

Pilot Relief: 3.9 MPa

Haichen Replacement: HC-DBW-10-PC200

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📦 Hydraulic Cylinders 3 Cylinders

Cylinder	Bore (mm)	Rod (mm)	Stroke (mm)	Haichen Part #
Boom Cylinder	140	100	1,500	HC-CYL-BOOM-PC200
Arm Cylinder	125	90	1,700	HC-CYL-ARM-PC200
Bucket Cylinder	115	85	1,300	HC-CYL-BUCKET-PC200

🔩 Cylinder Seal Kits

Boom Seal Kit: HC-SEAL-BOOM-PC200 (NOK/FKM Material)

Arm Seal Kit: HC-SEAL-ARM-PC200 (NOK/FKM Material)

Bucket Seal Kit: HC-SEAL-BUCKET-PC200 (NOK/FKM Material)

Warranty: 12 months

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🛢️ Filters & Accessories Consumables

Hydraulic Oil Filter

OEM Part: 07063-01210

Filtration: 10 μm

Haichen Replacement: HC-FILTER-HP-PC200

Return Filter

OEM Part: 20Y-60-31430

Filtration: 25 μm

Haichen Replacement: HC-FILTER-RT-PC200

Pilot Filter

OEM Part: 07063-01100

Filtration: 3 μm

Haichen Replacement: HC-FILTER-PL-PC200

Hydraulic Hose Kit

Type: SAE 100R1/R2

Pressure: Up to 400 bar

Haichen Kit: HC-HOSE-KIT-PC200

🔧 Common Faults & Solutions Troubleshooting

🔊

Pump Noise

Loud noise from main pump, cavitation, air entrainment.

View Solution

💧

Hydraulic Leakage

Cylinder leaks, hose bursts, fitting leaks, seal failures.

View Solution

🌡️

System Overheating

High oil temperature, pump overheating, system overheating.

View Solution

📋

All Faults

Complete troubleshooting database for Caterpillar 320D.

111 Faults

💬 Need Parts for 320D?

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🚜 Related Caterpillar Models See Also

🚜

Caterpillar PC300-8

30-ton excavator, similar hydraulic system configuration.

Coming Soon

🚜

Caterpillar PC220-8

22-ton excavator, shares many parts with 320D.

Coming Soon

🚜

Caterpillar PC240-8

24-ton excavator, upgraded hydraulic system.

Coming Soon

📚

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🚜 Haichen Industrial - Caterpillar 320D Hydraulic Parts

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