21W-62-43191 21W6243191 Hose Excavator Spare Parts For KOMATSU PC78MR PC78US PC78UU

• 21W-62-43191 21W6243191 Hose Excavator Spare Parts For KOMATSU PC78MR PC78US PC78UU

• Specification

• Function 

1. Hydraulic Fluid Transfer
Positioned in the machine’s hydraulic circuit, this hose conveys pressurized fluid from the pump to actuators such as cylinders, motors, or valves. It enables the movement of booms, buckets, and other hydraulic-powered attachments by maintaining a continuous and controlled flow of fluid.

2. Pressure and Temperature Resistance
Built to handle high pressures (up to 3,000–5,000 psi depending on the model) and operating temperatures ranging from -40°C to +100°C (-40°F to +212°F), the hose is constructed with multiple layers including an inner tube, reinforcement layers (such as braided steel wire), and an outer cover. This design ensures it can withstand the mechanical stresses and thermal variations of heavy-duty applications.

3. Flexibility and Durability
Despite its high-pressure capabilities, the hose is designed to be flexible enough to allow for the movement of machine components without kinking or restricting fluid flow. The outer cover is resistant to abrasion, ozone, and weather, protecting the inner layers and extending the hose’s service life even in harsh environments.

• Compatible models

EXCAVATORS PC78MR PC78US PC78UU PC88MR

• More hose parts fit for KOMATSU machinery

• Catalog parts list

• We could supply the following spare parts

1 Hydraulic parts: hydraulic pump, main valve, hydraulic cylinder, final drive, travel motor, swing machinery, swing motor etc.

2 Engine parts: engine ass’y, piston, piston ring, cylinder block, cylinder head, crankshaft, turbocharger, fuel injection pump, starting motor and alternator etc.

3 Undercarriage part: Track roller, Carrier roller, Track Link, Track shoe, Sprocket, Idler and Idler cushion etc.

4 Cab parts: operator’s cab, wiring harness, monitor, controller, seat, door etc.

5 Cooling parts: Radiator, air conditioner, compressor, after cooler etc.

6 Other parts: Service kit, swing circle, engine hood, swing joint, fuel tank, filter, boom, arm, bucket etc.

• Advantage

1. Offer Top quality & competitive products

2. Support 12-month warranty

3. 100% tested before shipping

4. Delivery in time

5. A wide range of Oil Pressure Sensor, Fuel Tank Level Sensor, Temperature Sensor, Speed Sensor for excavator 

6. More than 15 years production and 11 years foreign trade experience

7. Professional QC team

8. Best sales team, 24 hours service

• Packing and Shipping

Packing Details :

inner packing : plastic film for wrapping

external packing : wooden

Shipping :

within 3 days after received the payment , by air or by express or by sea on the basis of the

quantity and emergency circumstances.

1. By Couriers: DHL, UPS, FEDEX, TNT are the main courier companies we are cooperated,

2. By Air: Delivery from the Guangzhou air port to customer's destination city air port.

3. By Sea: Delivery from the Huangpu port .

• Product Warranty

1. Warranty Period: 3 Months' warranty from the date of arrival. Longer period of 6 months' warranty could be offered with higher price level.

2. Warranty type: replacement of the parts that have quality problem.

3. Warranty is not valid for below s

* Cutomer give wrong information about the order

* Force Majeure

* Wrong installation and operation

* Rust because of wrong stock & maintenance