Hydraulic line repair data

Caterpillar CAT®M318 Attachments – Quick Coupler Hose List

Coverage details

Hoses: 31 records
Full specifications: 31 records
Systems: 1 systems
Length range: 460–7,700 mm

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 3

177-7141

Installation route: 大臂(快换)~小臂接头(快换)

Length: 1,170 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 5

148-0619

Installation route: 快换装置~过渡接头(小臂侧)

Length: 1,025 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 5

145-4960

Installation route: 大臂(快换)~小臂(快换)

Length: 800 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 14

142-4852

Installation route: 大臂快换管

Length: 1,685 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 5

115-7997

Installation route: 大臂(快换)~小臂(快换)

Length: 800 mm
Specification: DN10；6SH-6；42Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

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Diagram Pipe No. 5

129-2640

Installation route: 快换装置~过渡接头(小臂侧)

Length: 1,025 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 7

145-4961

Installation route: 大臂(快换)~小臂(快换)

Length: 1,200 mm
Specification: DN25；4SP-16；35Mpa
Left fitting: 90° heavy-series flangeOriginal Chinese: 90°法兰-重型
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 13

176-4054

Installation route: 快换装置管路

Length: 590 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 1

2T-2159

Installation route: 小臂(快换)小臂接头(快换)

Length: 519 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 7

121-0387

Installation route: 大臂(快换)~小臂(快换)

Length: 1,060 mm
Specification: DN10；6SH-6；42Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

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Diagram Pipe No. 9

147-5273

Installation route: 大臂(快换)~电磁阀(分配阀前)

Length: 7,700 mm
Specification: DN6；2SN-4；40Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 12

176-3276

Installation route: 快换装置~过渡接头(小臂侧)

Length: 980 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 7

135-4234

Installation route: 大臂后段(快换)~大臂前段(快换)

Length: 4,000 mm
Specification: DN19；4SP-12；35Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 3

154-2839

Installation route: 小臂(快换)~小臂接头(快换)

Length: 460 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 5

223-3306

Installation route: 大臂(快换)~小臂(快换)

Length: 1,290 mm
Specification: DN25；6SH-16；42Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 6

148-0620

Installation route: 快换装置管路

Length: 600 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 4

142-4854

Installation route: 大臂(快换)~小臂(快换)

Length: 1,400 mm
Specification: DN32；1SN-20；4.3Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 45°美制内螺纹平面密封

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Diagram Pipe No. 1

9R-8735

Installation route: 大臂快换管

Length: 1,575 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 3

204-0689

Installation route: 大臂(快换)~小臂(快换)

Length: 1,400 mm
Specification: DN25；6SH-16；42Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 45°美制内螺纹平面密封

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Diagram Pipe No. 4

141-9100

Installation route: 大臂(快换)~小臂(快换)

Length: 1,200 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 6

118-6167

Installation route: 大臂(快换)~小臂(快换)

Length: 900 mm
Specification: DN10；6SH-6；42Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

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Diagram Pipe No. 10

142-4853

Installation route: 大臂(快换)~小臂(快换)

Length: 1,400 mm
Specification: DN19；4SP-12；35Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 45°美制内螺纹平面密封

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Diagram Pipe No. 4

115-7992

Installation route: 大臂后段(快换)~大臂前段(快换)

Length: 800 mm
Specification: DN10；6SH-6；42Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 11

147-8424

Installation route: 大臂(快换)~电磁阀(大臂左)

Length: 5,600 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 8

142-4850

Installation route: 大臂(快换)~小臂(快换)

Length: 900 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

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Diagram Pipe No. 2

137-4610

Installation route: 大臂(快换)~小臂接头(快换)

Length: 990 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

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Diagram Pipe No. 6

129-2641

Installation route: 快换装置管路

Length: 600 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 3

147-4121

Installation route: 大臂后段(快换)~大臂前段(快换)

Length: 4,000 mm
Specification: DN32；1SN-20；4.3Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 1

149-0197

Installation route: 小臂(快换)~小臂接头(快换)

Length: 1,600 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 8

179-9118

Installation route: 小臂(快换)~小臂接头(快换)

Length: 650 mm
Specification: DN10；2SN-6；33Mpa
Left fitting: 45°美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 2

203-2924

Installation route: 大臂后段(快换)~大臂前段(快换)

Length: 3,980 mm
Specification: DN25；6SH-16；42Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Workshop guide

Finding the correct hydraulic hose for Caterpillar CAT®M318 Attachments – Quick Coupler

Start with the machine and route

For Caterpillar CAT®M318 Attachments – Quick Coupler, identify the exact model and hydraulic system on the machine first. A part number or diagram pipe number is the fastest way to narrow a replacement hose; if neither is visible, compare the installation route and the existing hose.

See all Caterpillar CAT®M318 systems

Read the dimensions before cutting

Check whether a listed dimension is finished assembly length, hose-only length, or cut length. These are not interchangeable. Confirm hose specification and pressure rating, then compare both ends separately: thread, sealing seat, size, angle, and orientation.

Records to compare

177-71411,170 mm · DN10；2SN-6；33Mpa · 大臂(快换)~小臂接头(快换)
148-06191,025 mm · DN10；2SN-6；33Mpa · 快换装置~过渡接头(小臂侧)
145-4960800 mm · DN10；2SN-6；33Mpa · 大臂(快换)~小臂(快换)

Use the drawing as a location check

Where an installation drawing or manual figure is available, match its callout to the part number and physical route. A hydraulic circuit diagram explains connections but does not show the exact routing of a hose on the machine. Take the old hose or clear end-fitting photographs to the workshop if any dimension is missing.

Based on current published data

Common Repair Questions

Questions appear only when a published record or linked PDF page provides the answer.

How many hoses are currently listed for Caterpillar CAT®M318 Attachments – Quick Coupler?

There are 31 published records. 31 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®M318 Attachments – Quick Coupler?

Based on published records with valid lengths, the range is 460–7,700 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®M318 Attachments – Quick Coupler?

The most frequent raw specifications in the current published records are: DN10；2SN-6；33Mpa (18 records), DN10；6SH-6；42Mpa (4 records), DN25；6SH-16；42Mpa (3 records), DN19；4SP-12；35Mpa (2 records), DN32；1SN-20；4.3Mpa (2 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Caterpillar CAT®M318 Attachments – Quick Coupler?

Each record keeps the left and right fitting descriptions separate. Current examples: 177-7141: left 90° elbow, American female thread, flat-face seal; right American female thread, flat-face seal; 148-0619: left American female thread, flat-face seal; right American female thread, flat-face seal; 145-4960: left 90° elbow, American female thread, flat-face seal; right American female thread, flat-face seal. Open the exact part-number or pipe-number record; do not swap ends based on appearance alone.

Can I locate a Caterpillar CAT®M318 Attachments – Quick Coupler hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 3 (177-7141), Pipe No. 5 (148-0619), Pipe No. 5 (145-4960), Pipe No. 14 (142-4852). Open a record to compare its installation position with the linked manual page.