Forklift Hydraulic seal
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Forklift Hydraulic Components
Doosan Forklift Hydraulic Seal Kit 401107-02654 – D30NX(M) D33NX(M) D35NX(M)
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Forklift Hydraulic Components
Forklift Hydraulic Pneumatic Cylinder Rubber Seal Kit
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Forklift Hydraulic seal
Forklift PU Hydraulic Piston Seal – UN UHS Heavy Machinery Oil Seal
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Forklift Hydraulic Seal: Cylinder Seal Kits, Piston Seals, and Pump Seal Rings
The forklift hydraulic seal is the critical sealing component that prevents hydraulic oil leakage in cylinders, pumps, and valve bodies throughout the forklift hydraulic system. Hydraulic seals operate under continuous high-pressure oil exposure and must maintain their sealing integrity through millions of cylinder cycles — a failed seal means immediate oil loss, pressure drop, and loss of hydraulic function. Kingstream supplies OEM hydraulic seals and seal kits for Doosan D-NX(M) series cylinders (401107-02654 complete kit), HELI hydraulic pumps (1-3T pump seal ring), universal PU piston seals in UN/UHS profiles with 12 material options (NBR, HNBR, EPDM, Silicone, FKM/Viton, PTFE), and customizable rubber seal kits manufactured to drawing specifications with hardness from 20-90 Shore A.
When to Replace Your Hydraulic Seals — Common Symptoms
• External oil drip from the cylinder rod area — Rod seal failure; oil is bypassing the rod seal and leaking externally
• Mast or load drifts down slowly when lifted — Piston seal bypass; hydraulic oil is leaking past the piston internally
• Reduced lifting speed or power — Internal seal leakage reducing effective hydraulic pressure
• Oil-contaminated cylinder exterior with dirt buildup — Wiper seal has failed, allowing dirt ingress that damages internal seals
• Hydraulic pump external oil leak — Pump shaft seal or housing seal failure; critical to replace before pump damage occurs
OEM Cross-Reference / Available Models
| Part No. / SKU | Spec 1 | Spec 2 | Application |
|---|---|---|---|
| 401107-02654 / SP100319 | Complete Seal Kit | Doosan NX(M) | Doosan D30NX(M) / D33NX(M) / D35NX(M) |
| HELI Pump Seal / SP100321 | Pump Seal Ring, 0.15kg | 1-3 Ton | HELI forklift hydraulic pump |
| UN/UHS PU Seal / SP100320 | 12 Materials, 30-90 ShA | Standard/Custom | Forklift heavy machinery cylinders |
| Rubber Seal Kit / SP100318 | NBR/EPDM/SIL/FKM, Custom | -30~200°C | Multi-industry hydraulic pneumatic cylinders |
Don’t see your model? Send us your cylinder or pump seal specifications →
Compatible Forklift Brands
Doosan D-NX(M) series, HELI 1-3 ton, and multi-brand forklifts with hydraulic cylinders and pumps requiring UN/UHS piston seals, rod seals, and complete seal kits.
Browse our complete Forklift Hydraulic System catalog for hydraulic pumps, lift cylinders, and hydraulic pipes.
8 Product Categories In Stock
Engine, brake, hydraulic, electrical, steering & axle, cooling system, transmission, and maintenance parts — one partner for all your forklift spare parts needs.
OEM Cross-Reference Matching
Send us an OEM number, part photo, or forklift model. We cross-match against our database before quoting — no guesswork, no wrong parts shipped.
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