Injection Moulding Machine Hydraulic Pump Repair Services
Injection Moulding Machine hydraulic pump inspection, troubleshooting, repair, rebuilding and performance testing for different hydraulic pump systems.
Our Core Hydraulic Pump Services
Comprehensive diagnostic, rebuilding, and calibration services for Plastic Injection Moulding Machines:
Hydraulic Pump Inspection
Detailed physical examination, micrometer tolerance checking, and crack detection of pump housing, shafts, and rotating parts.
Pump Repair & Rebuild
Complete reconditioning, precision surface micro-lapping, and installation of genuine OEM replacement rotating groups.
Pressure & Flow Testing
Computerized load bench testing up to 400 Bar to verify flow rate, pressure holding capacity, and volumetric efficiency.
Component Replacement
Replacement of worn pistons, cylinder blocks, swashplates, valve plates, bearings, bushes, and high-pressure Viton seals.
Troubleshooting
Systematic diagnostic investigation of cavitation noise, pressure loss, overheating, and erratic hydraulic response.
Installation & Testing
Field installation support, system flushing guidance, and final operational performance testing on target machinery.
Injection Moulding Machine Hydraulic Pump Repair Service
We don't just replace parts—we execute a complete engineering overhaul to restore your Injection Moulding Machine hydraulic pump to factory performance standards.
Our workshop is equipped with high-precision surface lapping machines, micrometer tolerance audit tools, and a computerized hydraulic test rig capable of generating up to 400 Bar continuous working pressure.
Full Technical Capability Workflow
Our structured technical procedure includes: Initial pump inspection → Fault diagnosis → Pressure testing → Complete disassembly → Internal component inspection → Damaged component replacement → Reassembly → Bench testing → Final installation support.
Technical Engineering Standards
- Sub-Micron Surface Lapping: Port and valve plates micro-lapped to achieve zero internal fluid bypassing.
- OEM Rotating Groups: High-durability piston blocks, slippers, and retainer plates fitted.
- Dynamic Test Bench Certificate: Every pump tested under full load prior to dispatch.
- 50%–60% Cost Saving: High performance reconditioning at a fraction of new pump cost.
Common Injection Moulding Machine Hydraulic Pump Problems We Diagnose
Note: Possible causes presented below represent initial diagnostic possibilities to be confirmed during physical inspection.
| Problem | Possible Diagnostic Reason |
|---|---|
| Low hydraulic pressure | Pump internal wear / control valve issue / worn valve plate |
| Pump not building pressure | Internal leakage across pistons / stuck relief spool / control fault |
| Slow Injection Moulding Machine movement | Low volumetric flow rate / worn rotating group / pump displacement issue |
| Excessive noise | Aeration / fluid cavitation / worn piston slippers or swashplate cradle |
| Oil leakage | Shaft seal failure / flange gasket degradation / cracked pump housing |
| Pump overheating | Severe internal fluid bypass / oil degradation / cooling failure |
| Pressure fluctuation | Swashplate control system wear / fluctuating relief valve response |
| Excessive vibration | Mechanical bearing wear / shaft misalignment / loose internal components |
Signs Your Injection Moulding Machine Hydraulic Pump May Need Repair
If your Injection Moulding Machine is exhibiting any of the following operational symptoms, prompt hydraulic pump inspection is recommended to prevent catastrophic mechanical failure:
Don't Ignore Pressure Drops!
Operating a machine with internal pump slippage damages hydraulic cylinders and control valves through metal particle contamination.
Instant WhatsApp DiagnosisTypes of Injection Moulding Machine Hydraulic Pumps We Repair
We service all primary hydraulic pump types utilized across Plastic Injection Moulding Machines:
Axial Piston Pump
High-pressure variable & fixed swashplate axial piston pump overhauling.
Variable Displacement
Load-sensing and pressure-compensated variable displacement pump calibration.
Fixed Displacement
Constant flow fixed displacement piston and gear pump reconditioning.
Gear Pump
External and internal hydraulic gear pump body honing and seal replacement.
Vane Pump
Single and double variable displacement vane cartridge replacement.
Pilot Pump
Pilot control pressure gear pump repair for smooth joystick actuation.
Main Hydraulic Pump
Tandem main hydraulic pump overhauling for heavy duty operations.
Charge Pump
Hydrostatic drive booster and charge pump rebuilding & pressure setting.
Injection Moulding Machine Hydraulic Pump Brands We Service
We overhaul hydraulic pumps for all leading equipment manufacturers:
Toshiba, Windsor, Haitian, Ferromatik Milacron, Engel, KraussMaffei, LKM, Sumitomo, Yuken, Rexroth, Eaton Vickers, Parker
Injection Moulding Machine Hydraulic Pump Components We Inspect & Repair
Every component undergoes strict dimensional and wear analysis:
Our Injection Moulding Machine Hydraulic Pump Repair Process
A systematic 10-step process ensuring total reliability and performance:
Initial Inspection
Visual and physical evaluation of pump external condition, shaft rotation, and oil contamination status.
Pressure Diagnosis
Diagnostic check of operating pressure, volumetric output, and internal bypass rate.
Pump Removal
Safe removal of the hydraulic pump assembly from the target machinery with port capping.
Disassembly
Complete teardown of pump casing, valve block, regulator, and rotating group in clean workshop environment.
Component Audit
Micrometer measurement of pistons, cylinder bores, swashplate curvature, and shaft splines against factory limits.
Repair / Spares
Micro-lapping of port faces and replacement of worn parts with genuine OEM components.
Reassembly
Precision reassembly of rotating groups, bearings, and Viton seal kits according to torque specifications.
Bench Testing
Full load dynamic test bench validation up to 400 Bar to verify pressure holding and volumetric efficiency.
Installation
Re-installation on the machinery, line bleeding, and initial system oil flushing guidance.
Final Validation
Final operational verification under actual field load conditions to guarantee 100% machine productivity.
Injection Moulding Machine Hydraulic Pump Troubleshooting
Interactive troubleshooting guide for common hydraulic operational issues:
Internal fluid bypassing across worn valve plates, damaged swashplate cradle, or miscalibrated pressure relief valve.
Perform a flow meter test under load, check relief valve pressure setting, inspect suction filter for metal particles.
Sheared pump drive shaft, broken coupling, stuck regulator spool, or completely worn rotating assembly.
Inspect drive input rotation, measure pilot charge pump pressure, and check for severe internal pump seizure.
Air suction entry, clogged suction strainer, low hydraulic oil level, or worn piston slipper feet.
Tighten suction line fittings, check hydraulic fluid viscosity, and inspect piston slippers for detachment.
Hardened shaft oil seal, blown casing O-ring gasket, or excessive case drain pressure.
Check shaft seal lip wear, measure internal case drain pressure, and replace housing Viton seals.
Injection Moulding Machine Hydraulic Pump Testing & Performance Inspection
Every repaired hydraulic pump undergoes full dynamic testing on our state-of-the-art 400 Bar computer-monitored hydraulic test bench before delivery.
Pressure Testing
Testing continuous working pressure up to 400 Bar to verify seal integrity.
Flow Rate Testing
Measuring exact GPM/LPM flow output across varying engine RPM levels.
Internal Leakage Test
Measuring case drain leakage to guarantee 95%+ volumetric efficiency.
Load & Thermal Test
Thermal monitoring during sustained 60-minute full load operating runs.
Dynamic Bench Certificate
We issue a computerized test report showing pressure holding, flow output curve, and temperature logs with every dispatch.
Call Testing FacilityRepair, Rebuild or Replace: What Does Your Injection Moulding Machine Pump Need?
Final decision is made after physical inspection—definitive diagnosis without inspection is avoided.
Repair
Specific repairable component problem (e.g. worn shaft seal, minor valve plate scoring, or single cartridge failure).
Rebuild / Overhaul
Multiple worn internal components (pistons, cylinder block, swashplate, bearings) while pump casing remains intact.
Replacement
Severe housing body cracks, catastrophic mechanical destruction, or uneconomical repair costs exceeding new unit price.
Injection Moulding Machine Hydraulic Pump Repair Cost
Hydraulic pump repair pricing depends on several specific engineering factors. Rather than providing generic estimates, we evaluate:
Request an Exact Price Estimate
Send us your pump model number and breakdown symptoms for an immediate quote.
Get Repair Estimate
On-Site & Workshop Hydraulic Pump Repair
We provide two genuine service options depending on your location and machine requirements:
On-Site Service
Field Technical Support- Initial physical inspection on machinery
- Field diagnostic pressure checks
- Safe pump removal & port capping
- Emergency on-site troubleshooting
Workshop Repair
Advanced Rebuilding Facility- Complete ultrasonic disassembly & degreasing
- Micrometer component tolerance inspection
- Sub-micron surface lapping & rebuild
- 400 Bar dynamic test bench certification
Injection Moulding Machine Hydraulic Pump Repair Case Study
Machine: 250-Ton Plastic Injection Moulding Machine (Haitian)
Pump Model: Yuken PV2R2/PV2R3 Double Vane Pump
Reported Problem: Inconsistent mold clamping tonnage resulting in flash on molded plastic components.
Inspection Findings
Cam ring wear and tip erosion on primary stage vane cartridge assembly.
Repair Performed
Replaced primary vane cartridge kit, reconditioned pump body, installed new shaft seals.
Dynamic Testing
Calibrated on test bench for pressure-flow proportional response curves up to 210 Bar.
Final Result
Stable clamp tonnage holding achieved; product defect rate reduced to zero.
Why Choose Our Injection Moulding Machine Hydraulic Pump Repair Service?
Grounding our service in empirical technical capabilities and transparent workshop testing:
Experienced Technicians
25+ years of specialized experience in hydraulic pump overhauling and valve calibration.
400 Bar Testing Facility
Dynamic computerized hydraulic test bench for verifying pressure, flow, and leakage parameters.
Genuine OEM Parts
We use genuine replacement rotating groups, piston slippers, and Viton seal packages.
Injection Moulding Machine Hydraulic Pump Repair Service Areas
We provide rapid repair and logistics pickup across major industrial hubs:
Explore Hydraulic Pump Repair by Application & Machinery
Select your machinery type to view specialized hydraulic pump repair, testing, and overhauling services:
Frequently Asked Questions
Common questions about Injection Moulding Machine hydraulic pump repair, warranty & turnaround time:
