🚀 Direct Source Pricing • 100% Caliper & Thread Dimension Verification • Air Express Delivery in 5-7 Days
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ChinaSourceDM Excavator Parts & Seals Division
Micro & Medium Excavators (0.8T ~ 25T)

Source China Excavator Parts
Without Misalignment or Quality Risks.

We eliminate the 300% middleman markup. Get NOK-grade cylinder seal repair kits, 50-piece master key sets, OEM ignition switches, pressure sensors, proportional solenoids, bucket teeth, and chrome pins sourced directly from verified Chinese industrial clusters.

NOK & Parker
High-Pressure Seal Grade
0% Kickbacks
100% Transparent Price
±0.05 mm
Digital Caliper Check
5-7 Days
DHL/FedEx Air Express
⚡ Instant RFQ Helper Avg Reply < 2h
1. Tell Us Your Machine Model:
e.g. Kubota KX040-4, Cat 301.8, Yanmar ViO35, SANY SY35U, Bobcat E20
2. Specify What You Need:
Boom cylinder seals, ignition switch with keys, pressure sensors, or bucket teeth.
3. We Dispatch Samples & Bulk Orders:
We inspect pin-outs, thread gauges, oil resistance, and ship door-to-door.
Get Quotation with OEM / Sample Code →
Pillar 1 • Core Wear Consumables

Hydraulic Cylinder Seal Kits & Universal O-Ring Boxes

Hydraulic leaks cause catastrophic pressure drop and downtime. We supply OEM-spec and customized high-pressure polyurethane, NBR, and FKM fluororubber seal kits tested up to 35 MPa.

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Cylinder Seal Kits

Complete rebuild kits for Boom, Arm, Bucket, and Dozer Blade cylinders.

  • DKB/PU Dust Wipers
  • Stepseal Rod Seals (PTFE)
  • Glyd Ring Piston Seals
  • Phenolic Fabric Guide Rings
NOK / Parker standard cross-reference
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O-Ring Assortment Kits

Multi-compartment storage boxes designed for field technicians and workshops.

  • 386 pcs & 412 pcs Metric Kits
  • NBR 70° / 90° Shore A
  • FKM / Viton High-Temp Kits
  • Flange & Pilot Valve O-Rings
Custom logo & private labeling available
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Center Swivel Joint Seals

Prevents hydraulic cross-leakage between upper structure and undercarriage.

  • Rotary Distributor Seal Rings
  • PTFE + Bronze Slide Rings
  • Anti-Blowout O-Rings & Backups
  • High-Torque Swivel Seal Sets
Zero travel drift guaranteed
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Floating Duo-Cone Seals

Heavy-duty alloy cast floating seals for travel motors, final drives, and idlers.

  • High-Chromium Alloy Steel
  • NBR & Silicone Elastic Toric Rings
  • Track Roller & Sprocket Seals
  • TC/TB Skeleton Oil Seals
Mirror-lapped precision surfaces
Pillar 2 • Security & Control

Excavator Ignition Switches, Master Key Sets & Locks

Lost keys or failed ignition starter switches cause unnecessary machine stalls. We supply direct-fit OEM switches with preheat positions and universal master key rings.

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OEM Ignition Key Switches

4-position and 6-terminal ignition switches with glow-plug/preheat and starter spring return.

Kubota (RD411-51110) KX / U-Series
Caterpillar (7N0718) 301.5 / 308 / 320
Yanmar / Bobcat / SANY Direct Plug-in
Waterproof rubber collar + 2 brass keys included.
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Universal Master Key Sets

The essential key ring for equipment rental yards, mechanics, operators, and scrap handlers.

  • 10-Piece Starter Set: Cat, Komatsu, Kubota, Yanmar, Bobcat
  • 24-Piece Workshop Set: + Kobelco, Hitachi, Takeuchi, SANY
  • 50-Piece Master Ring: Complete North America & Euro coverage
  • Laser-engraved machine brand markings
High volume wholesale MOQ from 50 sets
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Cabin, Tank & Battery Switches

Electrical safety isolators, pilot rocker switches, and fuel theft prevention accessories.

  • Battery Disconnect Isolators: 12V/24V 300A-1000A
  • Locking Diesel Caps: Threaded & bayonet fuel tank caps
  • Cabin Locks & Handles: Heavy cast door locks with keys
  • Joystick Microswitches: Horn & auxiliary button switches
IP67 waterproof & vibration-resistant rated
Pillar 3 • Electronics & Power

Sensors, Solenoid Valves, Wiring & Controllers

Every electrical component is 100% bench-tested for signal stability, insulation resistance, and thermal endurance before boxing.

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Pressure Sensors

High & low pressure transducers for main pump and pilot control.

• 50 MPa high pressure sensors
• 0.5 - 4.5V linear output
• BSPP / NPT thread verified

Solenoid Valves

Proportional, swing lock, pilot cutoff, and fuel stop solenoids.

• 12V / 24V DC rated coils
• Flameout shutoff solenoids
• Main control valve blocks
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Wire Harnesses

Engine and cabin main wiring looms with flame-retardant corrugated conduit.

• Deutsch & AMP waterproof plugs
• Tin-plated pure copper wires
• Exact pin-to-pin wiring map
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Monitors & Starters

Full LCD dashboard clusters, starter motors, and heavy alternators.

• 12V/24V high-torque starter motors
• 40A - 80A alternators
• Multi-gauge LCD displays
Pillar 4 • Ground Engaging Tools

Bucket Teeth, Adapters, Pins & Bushings

High-strength alloy wear parts designed for rock digging, demolition, and trenching. Hardness ratings from HRC 48 to 54.

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Forged Bucket Teeth & Adapters

Standard, rock chisel, tiger tooth, and heavy penetration profiles for mini and compact buckets.

  • • Cat style (J200, J250, J300)
  • • Kubota / Yanmar side-pin mini teeth
  • • Vertical & horizontal lock pins & retainers
  • • Weld-on adapter shanks
🔩

Hardened Chrome Pins & Bushings

40Cr / 42CrMo structural steel induction hardened, precision ground, and hard chrome plated.

  • • Bucket pivot pins (25mm to 80mm dia)
  • • Oil-groove bronze & composite bushings
  • • Carbon steel anti-slop shims (0.5mm - 2.0mm)
  • • Grease nipples & dust seals
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Undercarriage & Filter Kits

Continuous rubber tracks, track rollers, drive sprockets, and high-flow filtration kits.

  • • Rubber tracks (230mm, 300mm, 350mm width)
  • • Forged drive sprockets & idler wheels
  • • High-efficiency pilot & suction filters
  • • Fuel water separator filter elements

Direct Cross-Reference & Part Compatibility For Global Fleet Brands

KUBOTA
YANMAR
CAT
KOMATSU
BOBCAT
SANY
KOBELCO
TAKEUCHI
Quality Assurance

Our 4-Step Pre-Shipment Inspection Protocol

We don't drop-ship blindly. Every order passes through our Dongguan/Jining QC station.

01

OEM Number & Diagram Check

Cross-match your machine serial numbers, exploded parts diagrams, and thread standards.

02

Caliper & Thread Pitch Metric Test

Measure cylinder rod OD, bore ID, pin diameters, and hydraulic thread pitches (BSPP/NPT/Metric).

03

Electrical & Live Power Bench Test

Test coil resistance, solenoid actuation under 12V/24V, and pressure sensor voltage curves.

04

High-Density Vacuum Boxing

Oil-proof sealed packaging for rubber O-rings, bubble wrap for sensors, anti-rust oil for pins & teeth.

Fast Part Quotation

Send Us Your Part Numbers or Broken Sample Photos

We reply within 2-4 hours with factory source pricing, dimension confirmation, and shipping estimates.