Jungheinrich 51039659 Cylinder, Lift | 2WP4500 DFG 320s-430s

Overview

The 51039659 Cylinder, Lift is a replacement hydraulic lift cylinder for Jungheinrich forklifts, covering the 2WP4500 and the DFG 320s, DFG 425s and DFG 430s counterbalance trucks. The lift cylinder is the core of the mast assembly: it converts hydraulic pressure into the linear force that raises the carriage and its load. When a cylinder begins to drift under load, leak oil or respond slowly, lifting performance and safe load handling are compromised. Fitting the correct 51039659 Cylinder, Lift restores smooth, consistent lifting and helps protect the rest of the hydraulic system from unnecessary strain.

Compatibility

The 51039659 for 2WP4500 trucks and Jungheinrich DFG s-series is specified for a focused range of models, grouped by series:

• 2WP4500 – Jungheinrich 2WP series
• DFG 320s / DFG 425s / DFG 430s – the Jungheinrich DFG s-series of counterbalance forklifts

Because Jungheinrich part applications can vary by mast type, build year and serial number, we recommend checking the number on your existing cylinder or confirming the truck’s nameplate data before ordering. Our team is happy to help you verify that the 51039659 Cylinder, Lift matches your machine.

Quality and Reliability

A lift cylinder works under constant high pressure and heavy cycling, so construction matters. This replacement cylinder is engineered to match Jungheinrich original specifications for bore, stroke, mounting points and hydraulic performance. Key characteristics include a hardened, wear-resistant piston rod, a durable sealing set for reliable pressure retention, and a robust cylinder body suited to daily warehouse and yard duty. Choosing a correctly matched 51039659 unit helps maintain lift speed, load-holding stability and overall mast reliability over the long term.

Installation and Maintenance Tips

• Fully lower the mast and release hydraulic pressure before starting work.
• Secure the mast and carriage according to the truck’s service manual.
• Compare the removed cylinder with the new 51039659 unit before fitting.
• Use clean hydraulic fluid and replace sealing elements where required.
• Torque all fittings and mounting hardware to specification and bleed air from the circuit.
• After installation, cycle the mast slowly and check for leaks or abnormal movement.
• Inspect hoses, fittings and cylinder rods regularly as part of routine maintenance.

Professional installation by a trained forklift technician is recommended for hydraulic components.

Why Order from Us

forkliftpartssearch.com specializes in forklift spare parts, including a wide selection of Jungheinrich components. When you order the 51039659 Cylinder, Lift from us, you get accurate product data, knowledgeable support to confirm compatibility, and a straightforward ordering process backed by a team that understands forklift hydraulics. If you are unsure whether this part fits your 2WP4500 or your DFG 320s, 425s or 430s, contact us with your truck’s serial number and we will help you identify the right part.