PCR-4B-20A-FP

3 week ago

0 0 

3 year

Product details

1. Product Overview

TheVolvo 55 Swing Motor Assembly PCR-4B-20A-FPis a core component of the swing system for Volvo EC55 series excavators, responsible for driving the rotation of the upper structure (cab, boom, etc.). The model numberPCR-4B-20A-FPindicates its design version, displacement, and interface compatibility, tailored for medium-sized hydraulic excavators.

------

2. Core Functions

• Swing Drive: Converts hydraulic energy into mechanical rotational energy, enabling ±360° continuous rotation of the excavator’s upper structure.

• Load Control: Integrated brake valve and damping device reduce impact during startup/stoppage, enhancing operational stability.

• Sealing Design: Features dual-lip seals and dust-proof rings to prevent hydraulic oil leakage and contamination ingress.

------

3. Technical Specifications

【表格】

Parameter Specification

Model PCR-4B-20A-FP

Compatible Models Volvo EC55B/EC55D/EC55E

Displacement 20 mL/r (per revolution)

Rated Pressure 280 bar (continuous operation)

Peak Pressure 320 bar (instantaneous max)

Speed Range 0–15 rpm (stepless adjustment)

Braking Torque 1,200 N·m (static braking)

Port Type SAE O-ring (port size: M22×1.5)

Weight Approx. 45 kg

------

4. Structural Components

(1) Hydraulic Motor Body

• Cylinder Block & Piston Group: 7 axial-piston units with high-strength alloy steel (e.g., 42CrMo4), hard-chrome plated (≥850 HV).

• Port Plate: Copper-based alloy (ZQSn6-6-3) with dual-kidney oil passages for optimized high/low-pressure switching.

• Bearing System: Tapered roller bearings (model 32010) for combined axial/radial load support.

(2) Brake Assembly

• Spring Brake: Disc spring set provides 1,200 N·m braking torque; hydraulic release requires ≥18 bar pressure.

• Damping Valve: Built-in to limit pressure shock during swing startup/stoppage (≤50 bar).

(3) Sealing System

• Shaft Seal: Fluororubber (FKM) dual-lip seal, resistant to -40°C–+150°C.

• Dust Wiper: Polyurethane (PU) scraper ring to prevent particle ingress.

------

5. Common Failures & Solutions

【表格】

Symptom Possible Causes Solutions

Weak Swing/Slow Speed Hydraulic oil contamination, brake not released, internal leakage Replace hydraulic oil, check brake pressure, replace seals

Swing Vibration Worn port plate, piston seizure Grind port plate, clean/replace pistons

Abnormal Noise Bearing failure, gear misalignment Replace bearings, inspect brake gears

Oil Leakage Aged shaft seal, cracked housing Replace shaft seal, weld-repair housing

------

6. Maintenance Recommendations

• Routine Inspection: Check oil level, seal condition, and brake pressure every 500 hours.

• Oil Requirements: Use ISO VG46 anti-wear hydraulic oil with cleanliness ≤ NAS 1638 Class 9.

• Replacement Intervals: Seals every 2,000 hours; bearings inspected every 4,000 hours.

• Storage Conditions: Fill with hydraulic oil during long-term storage (-20°C–+60°C).

You May Also Like

1609

Stationary scissor lift

1160

PSA Oxygen Plant Containerized

1004

Semi Double Scale Weight Packing Machine.mp4

1004

Stand up zipper bag making machine

638

Tea bag packing and boxing .mp4

620

Cashew vacuum packing machine

618

401-00060C K3V112DT-HNOV 2401-9158 K3V112DTP Hydraulic Main Pump For Doosan DX210W-7 DX220W-7 Excavator1

607

50-250PVC给水管或者PVC排水管生产线都可以.mp4

607

High Speed Multifunction Bag Making Machine

597

Granule packing machine for 4 side sealing bag

Bossgoovideo.com Contact Now

If you are interested in the product, contact Bossgoovideo.com for more information

*To:: Ningbo Hengnuo Hydraulic Drive Co.,Ltd

*Message:

Submit

 Disclaimer :

The information of Bossgoovideo.com limited shown above is provided by the user or collected on the network. Video 2B does not guarantee the authenticity,accuracy and legitimacy of Bossgoovideo.com limited information. Video 2B does not involve legal relationships and disputes between users arising from transactions other than secured transactions on this website. Disputes shall be settled by you through negotiation. If you are the person in charge or relevant employee of this enterprise, if you find that the enterprise information is incorrect or want to manage thiscompany, please contact us jacklee1558@gmail.com, after you claim the enterprise, you can obtain management permission, publish supplyand demand information, bring consulting orders, and remove page advertisements.

Suppliers

Ningbo Hengnuo Hydraulic Drive Co.,Ltd

Audited supplier

3 year

Main Product: hydraulic motor, gear box, hydraulic pump , hydraulic valve , hydraulic winch, hydraulic system

Contact now