The original manufacturer shifted the responsibility of the Hydraulic Pressure Control Valve, AAK to

Lateef, from Sweden, has been engaged in the procurement of hydraulic valves for 3 years. Last year, however, he stumbled due to a hydraulic pressure control valve used in a hydraulic climbing vehicle. At the beginning of last year, their hydraulic climbing car was complained by customers that it was unable to rise. During after sales service, it was judged that the hydraulic pressure control valve was abnormal, and must be replaced. The original manufacturer refused to be responsible, because it has passed the 1 year warranty period.

Lateef found AAK on B2B and left a message on AAK website: How long is the warranty period of hydraulic pressure control valve? I needed him to provide us drawings for discussion. According to his hydraulic pressure control valve drawing and working condition requirements, it is actually the standard part of SUN hydraulics. AAK has this procedure.

https://www.aakindustry.com/info-detail/hydraulic-pressure-control-valves-aak350