Engine Parts for Mitsubishi 4D84-2A Engine – Heavy Duty Replacement
Welcome to HanRui Hydraulic Supply. We provide a complete range of high-quality engine parts and hydraulic components, precision-manufactured as heavy-duty aftermarket replacements, compatible with Mitsubishi 4D84-2A engine systems. Our product line includes hydraulic main pumps, swing motors, travel motors, control valves, and engine overhaul kits – all engineered to restore your machine's performance and reliability.
📋 Applicable Working Conditions
| Application Scenario |
Specific Description |
| 🏗️ Earthmoving |
Large foundation excavation, site leveling, river dredging |
| 🏭 Mining |
Ore stripping, crusher feeding, heavy continuous operation |
| 🚧 Municipal Construction |
Pipeline installation, road repair, underground utility tunnels |
| 🌾 Agriculture & Irrigation |
Farmland renovation, irrigation channel excavation, reservoir desilting |
🔧 Common Faults & Solutions
⚙️ Hydraulic Pump – Common Faults
| Fault Symptom |
Possible Cause |
Recommended Solution |
| Weak Output |
Piston wear, excessive valve plate clearance |
Replace piston assembly, grind valve plate |
| Abnormal Noise |
Bearing damage, air suction, loose coupling |
Replace bearings, check suction line sealing |
| Oil Leakage |
Aging shaft seal, cracked housing |
Replace shaft seal, inspect housing for cracks |
| Overheating |
Incorrect oil viscosity, clogged cooler |
Use correct oil, clean cooler |
🔥 Engine (Mitsubishi 4D84-2A) – Common Faults
| Fault Symptom |
Possible Cause |
Recommended Solution |
| Hard Starting |
Clogged injectors, preheat system failure |
Clean injectors, check glow plugs |
| Power Loss |
Blocked air filter, turbocharger damage |
Replace air filter, inspect turbo impeller |
| Black Smoke |
Poor injector atomization, insufficient air intake |
Overhaul injectors, clean intake system |
| Engine Overheating |
Water pump failure, stuck thermostat |
Replace water pump, replace thermostat |
| Oil Leakage |
Aged gaskets, worn seals |
Replace gaskets and seals |
🔄 Swing Motor – Common Faults
| Fault Symptom |
Possible Cause |
Recommended Solution |
| Slow/Weak Swing |
Worn motor pistons, low relief valve pressure |
Replace piston assembly, adjust relief valve |
| Vibration & Noise |
Bearing wear, poor gear meshing |
Replace swing bearing, check gear clearance |
| Oil Leakage |
Aging shaft seal, damaged housing gasket |
Replace shaft seal and housing gasket |
| Sticking/Jerking |
Worn brake plates, stuck spool |
Replace brake plates, clean spool |
🚜 Travel Motor – Common Faults
| Fault Symptom |
Possible Cause |
Recommended Solution |
| Uneven Travel (Run-off) |
Uneven flow between motors, faulty proportional valve |
Check flow distribution, clean or replace proportional valve |
| Slow Travel |
Motor wear, stuck counterbalance valve |
Replace motor assembly, clean counterbalance valve |
| Abnormal Noise |
Planetary gear wear, bearing damage |
Replace planetary gear set and bearings |
| Oil Leakage |
Damaged floating seal, aged O-rings |
Replace floating seal and O-rings |
🎛️ Control Valve – Common Faults
| Fault Symptom |
Possible Cause |
Recommended Solution |
| Slow Response |
Stuck spool, low pilot pressure |
Clean spool, check pilot pump |
| Uncoordinated Actions |
Faulty merging valve, worn spool stem |
Overhaul merging valve, replace spool stem |
| External Leakage |
Aged seals, worn mating surfaces |
Replace seals, grind mating surfaces |
| Shock During Shifting |
Damaged cushion valve, blocked orifice |
Clean cushion valve, unblock orifice |
❓ Frequently Asked Questions
Q1: Where can I buy engine parts for Mitsubishi 4D84-2A?
A: HanRui Hydraulic Supply offers a complete inventory of engine parts and hydraulic components compatible with Mitsubishi 4D84-2A. We ship worldwide with MOQ starting at 1 piece.
Q2: What are the symptoms of a failing hydraulic pump on Mitsubishi 4D84-2A?
A: Common symptoms include weak boom/arm operation, slow travel speed, abnormal noise, hydraulic oil overheating, and visible leakage around the pump mounting flange.
Q3: How can I confirm compatibility with my Mitsubishi 4D84-2A engine?
A: Check the engine model plate on your machine – if it reads Mitsubishi 4D84-2A, our parts are direct-fit replacements. Our technical team can also assist with verification.
Q4: Do you offer swing motors and travel motors for this engine?
A: Yes, we supply swing motors, travel motors, and control valves all precision-engineered to work seamlessly with Mitsubishi 4D84-2A powered equipment.
📦 Recommended Popular Parts
Browse our selection of hydraulic pumps, engines, swing motors, travel motors, and control valves with part numbers for cross‑referencing.
| Component Category |
Recommended Model |
Part Number (Reference) |
Compatible Application |
| Hydraulic Pump |
HPV95 |
HP-95-4D84 |
Mitsubishi 4D84-2A / ZX350 |
| Hydraulic Pump |
K3V63 |
K3V63-4D84 |
Mitsubishi 4D84-2A / EX200 |
| Engine Assembly |
4D84-2A |
ENG-4D84-2A |
Mitsubishi 4D84-2A |
| Engine Overhaul Kit |
4D84-2A Kit |
OK-4D84-2A |
Mitsubishi 4D84-2A |
| Swing Motor |
MS-50 |
SM-50-4D84 |
Mitsubishi 4D84-2A / ZX350 |
| Swing Motor |
MS-40 |
SM-40-4D84 |
Mitsubishi 4D84-2A / EX200 |
| Travel Motor |
TM-35 |
TM-35-4D84 |
Mitsubishi 4D84-2A / PC200 |
| Travel Motor |
TM-45 |
TM-45-4D84 |
Mitsubishi 4D84-2A / ZX350 |
| Control Valve |
CV-6 |
CV-6-4D84 |
Mitsubishi 4D84-2A / ZX350 |
| Control Valve |
CV-5 |
CV-5-4D84 |
Mitsubishi 4D84-2A / EX200 |
