Repair & Overhaul: Hydraulic Jacks
Repair & Overhaul: Hydraulic Jacks
Repair and recertification of industrial hydraulic jacks of all designs: telescopic plunger and specialized high-tonnage units. Lifting capacities up to 500 metric tons. Complete diagnostic tear-down, structural repair and full-load proof testing.
Hydraulic Jacks We Service
Type
Scope of Repair
- Telescopic Jacks
Stage restoration, replacement of inter-stage seal assemblies, rod straightening and guide replacement.
- Plunger Jacks (Single-Acting)
Plunger grinding and hard chrome plating, body reconditioning, seal replacement and base plate repair.
- Double-Acting Jacks
Replacement of piston seals, restoration of cylinder bore surface geometry, rod repair or rod replacement.
- Specialized & Custom Jacks
Engineered solutions for metallurgy, mining equipment, presses, and test benches — any custom structural design.
We repair jacks from any manufacturer and of any lifting capacity. If your jack is not on the list, please contact us—we will evaluate the feasibility of the repair.
Key Advantages of Repair at Promgidropryvod
01
Specialization in High-Tonnage / Large-Scale Jacks
We repair heavy-duty hydraulic jacks with lifting capacities of up to 500 metric tons. Few service providers have the machining and handling equipment required for units of this scale.
02
Dedicated In-House Reconditioning Facilities
Our comprehensive fleet of turning, boring, and grinding machines, along with a dedicated weld cladding section, allows us to recondition worn components (plungers, piston rods, cylinder bodies) rather than merely replacing them with new assemblies. This approach is often faster and substantially more cost-effective than purchasing new parts.
03
Proprietary Load-Testing Rigs
Every remanufactured jack undergoes full-load proof testing on dedicated test frames. We issue an official equipment technical passport (test certificate) detailing actual measured performance data.
04
Warranty Coverage
Full warranty coverage across all types of repair and remanufacturing work performed.
Comprehensive Repair Workflow
01
Diagnostics and Defect Analysis
- Incoming inspection and exterior cleaning of the jack
- Geometric inspection of the plunger/rod, body (barrel), and base/support surfaces
- Measurement of clearances in guides and seal cavities
- Test bench evaluation to detect internal bypass leakage and pressure drop
02
Disassembly and Cleaning
- Complete teardown of the jack
- Ultrasonic or jet cleaning of all parts to eliminate contaminants, degraded lubricant, and wear debris
- Flushing of internal fluid chambers and the oil reservoir
03
Machining and Component Restoration
- Body (barrel) line boring: Restoring cylinder bore geometry (oversize boring or subsequent sleeve insertion)
- Plunger/rod grinding: Surface refinishing to nominal dimensions
- Hard chrome plating: Applying wear-resistant plating to plungers and rods for corrosion and abrasion protection
- Weld cladding: Repairing deep scoring, gouges, or severe wear on rods, followed by CNC finish turning
- Thread reconditioning: Re-cutting or chasing damaged threads on the rod end or body
- Base plate and clevis repair: Milling mounting faces and precision boring pin holes
- Custom component fabrication: CNC turning of pistons, bushings, wear guides, and gland nuts from bronze, brass, steel, or cast nylon (polyamide)
04
Valve Group Reconditioning
- Valve repair: Precision lapping of check balls, poppets, and valve seats; restoring seat geometry
- Hardware replacement: Replacing worn return springs, check balls, and shut-off elements
05
Component Replacement
- High-performance seals (U-cups, chevron packings, O-rings, wiper/scraper rings) — genuine OEM or high-grade equivalents
- Guide bushings (bronze, polyamide/cast nylon, steel)
- Complete plunger and rod assemblies (if reconditioning is unfeasible)
- Cylinder bodies (in cases of structural cracking or critical fatigue)
- Reservoir filler plugs, pressure release valves, and carrying handles
06
Assembly and Calibration
- Axial and radial clearance verification
- Torque-controlled assembly adhering to fastener specifications
- Pressure relief valve calibration
- Hydraulic fluid replenishment (standard or low-temperature fluid upon request)
07
Test Bench Validation
- Proof testing for external and internal tightness under rated operating pressure
- Verification of smooth stroke extension and retraction without binding
- Verification of release valve operation
- Tonnage proof-testing and lifting speed measurement
- Issuance of an equipment technical passport detailing actual recorded performance data
The Repair Process at Promgidropryvod
01
Receiving & Initial Cleaning
The jack undergoes external washdown and incoming visual inspection.
02
Teardown & Defect Inspection
Complete disassembly, precision measurement, and defect logging.
03
Quotation & Approval
Confirming the scope of work, timeline, and parts replacement list with the client.
04
Component Reconditioning & Machining
Plunger grinding, body boring, automated weld cladding, seat lapping/coordinate boring, CNC fabrication of missing parts, and hard chrome plating.
05
Assembly & Fluid Replenishment
Installation of new seal kits, torque tightening, and filling with conditioned hydraulic fluid.
06
Bench Testing & Certification
Full-pressure testing, holding-load validation, and final passport generation.
Frequently Asked Questions
How quickly do you repair hydraulic jacks?
Turnaround times start from 5 business days, depending on the complexity of the unit and the overall scope of work. Large-bore and heavy-tonnage industrial jacks may require additional turnaround time.
What if the plunger is severely worn or has deep gouges and scoring?
Turnaround times start from 5 business days, depending on the complexity of the unit and the overall scope of work. Large-bore and heavy-tonnage industrial jacks may require additional turnaround time.
What types of seals do you use during reconditioning?
Turnaround times start from 5 business days, depending on the complexity of the unit and the overall scope of work. Large-bore and heavy-tonnage industrial jacks may require additional turnaround time.
What should be done if the jack has lost its lifting capacity or fails to hold the load?
Turnaround times start from 5 business days, depending on the complexity of the unit and the overall scope of work. Large-bore and heavy-tonnage industrial jacks may require additional turnaround time.
Can vintage or legacy Soviet-manufactured hydraulic jacks be overhauled?
Turnaround times start from 5 business days, depending on the complexity of the unit and the overall scope of work. Large-bore and heavy-tonnage industrial jacks may require additional turnaround time.
Do you perform in-house machining of components required for the repair?
Turnaround times start from 5 business days, depending on the complexity of the unit and the overall scope of work. Large-bore and heavy-tonnage industrial jacks may require additional turnaround time.
Request Your Hydraulic Jack Repair Now
Attach a photo of the jack, its nameplate, or describe the malfunction. Our technical specialist will get in touch to clarify project details and provide a repair cost estimate.