705-21-28270gear pump for excavator hydraulic parts

Item

Gear pump series 

Material

Forged steel

Feature

More than 30 years experience on gear pump design and research. Professional specialized in hydraulic pump components about Komatsu construction Vehicle.

Owned-factory with competitive price

Quality and credit-reliable, complete varieties 

Advanced imported manufacture equipment

Product strength

1.  Shaft sleeves are imported from DAIDO Japan.
2. Oil sealing is made by NOK Japan.
3. Hydraulic pump mid-body is an extrusion molding which is produced by extruding machine (press power is 3600 Ton).
4. Smooth surface, hard density of material.
5. Complete variety for Komatsu (more than 200 kinds of Hydraulic pumps)

Classification

Construction Machinery Parts

Hydraulic pump Ass’y, Hydraulic pump parts/components

Quotation

Based on OEM parts or genuine parts, packing, quantity 

and other requirements

Sample

Available

Note

for fast and accurate pricing information, We need more details:

 l   your spec model of construction Vehicle

 l   The hydraulic pump part number  (most important)

 l   The photos of pump

 l   The direction of rotation for the pump (anticlockwise or  clockwise)

Pumps  Showroom

www.zzwanxun.en.china.cn

Delivery time

3-15days after received payment or deposit

Package

Carton box inside, wood box outside of carton box

Shipment methods

1. For stock products in factory, quantity is less than 5pieces, Express delivery method.
2. For manufacturing products, quantity is more than 5pieces, cargo forwarder delivery method.
3. The clients’ advice is acceptable

After sales service

1 year warranty

Usage introduction

1. The Hydraulic Oil must be clean and fresh; the bad condition of Oil will damage and reduce working life of pump.
2. It will affect working efficiency of pumps when the old pump and new pump connect together.

Installation and Operation Manual

In developed industry market, the spare parts of gear pump achieved sophisticated. Therefore, check of clean oil with operation before using pump. The installation should be according to the ex-works technical documents of gear pump, and related specification of this manual, also the pump structure should be taken into consideration.

1. Oil liquid cleanliness standard requirements up to NSA10 level---NSA11 Level (The average value of contamination performance indicators less CB/T14039-2002rule 19/16).In others words, when using new products, oil storage tank must be cleaned completely or oil filter vehicle should carried out clean the oil, and update filter.(New products and badly worn pump can also cause technical damaged problem),once iron pin entry into new-pump with oil. The customer must ensure clean oil-channel and take oil tank, update filter.)
2. Program of pump drive shaft and machine output shaft Max.0.05mm.The inside of spline bushing worn parts has been replaced at the proper time, or coaxial degree might have influence. Measurement the pump of brack installation and connection structure verticality less 0.05mm. It must be check machine drive and pump drive shaft concentricity within 0.05mm.
3. When replace new pump, it requirements fill up with hydraulic oil inlet position, and turn a half circle direction to pump rotation. The gear pump inspection shall be done in this side. After installing, check if the connecting head, seal ring, leak oil, leak out of this pipe. Within 20mins keeping low speed without air. The machine will not be operation and burn shaft if pressure insufficient.
4. In addition, check safety valves work smoothly. Gear pump overload (allowed 1.15 times under rated of pressure instantaneous overload about 1min).Never uses a safety vale too high and happened frequent shock pressure. Otherwise, it occurs leak oil, broke shaft, plot ratio, boom pump...etc