First, send us photos or videos that clearly show the faulty part of the hydraulic cylinder. Next, we will review the design drawings to spot any flaws. If the design checks out, we will examine the production records for process errors. Then we will share our findings with you by email or phone and guide you through the repair steps. If needed, we can dispatch a technician to your site. Should none of these solutions resolve the issue, ship the cylinder back to China.