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CAT 390F Boom Cylinder Assembly

5.0 (3 Reviews) | 0 Sold | 7 Views

Part Number 3120341

OEM Number 312-0341

Brand Caterpillar

Condition New

Bulk Pricing (FOB)

2+ pcs

$17,500.00

Min. Order: 1 Piece(s)

Lead Time: 2-3 Weeks

Warranty: 24 Months

Weight: 650.00 kg

Material: Chrome Steel

Quantity:

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Caterpillar

United States

Verified

Genuine CAT boom cylinder for 390F class 90-ton excavators. Complete assembly.

Genuine Caterpillar boom cylinder for 390F class hydraulic excavators. Complete factory-assembled unit ready for installation.

Features:
- Precision honed barrel (Ra ???0.4)
- Hard chrome rod (40+ microns)
- NOK/Parker premium seals
- 380 bar working pressure
- Cushioned stroke ends

Order two (2) for complete machine. Sold individually.

Key Features

Genuine Caterpillar
180mm bore cylinder
40+ micron chrome rod
Premium NOK seals
380 bar rated
Cushioned ends
Factory assembled

Application	CAT 390F Boom
Bore	180mm
Rod	130mm
Stroke	2050mm
Closed Length	2980mm
Extended	5030mm
Working Pressure	380 bar
Test Pressure	570 bar
Weight	650 kg
Material	Chrome Steel
Weight	650.00 kg

Compatibility information not specified. Contact us for details.

Shipping Options

Flatbed or LTL freight. FOB CAT dealer. 1-2 weeks.

Packaging Details

Steel pallet, wooden crate. Rod protected. Ports capped.

Lead Time: 2-3 Weeks

5.0 /5

3 total reviews

Lars Andersson Sweden

Dec 30, 2025

Been in this industry for 20 years - this is one of the best parts I've purchased. No complaints whatsoever.

Hiroshi Tanaka Japan

Dec 24, 2025

Excellent condition, well-packaged, and authentic. Our mechanics confirmed it's genuine quality.

Raj Patel India

Dec 21, 2025

Incredible quality! Far exceeded expectations. Our entire fleet now uses these parts. Cannot recommend enough!

CAT 390F Boom Cylinder Assembly

Caterpillar

Key Features

Shipping Options

Packaging Details

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