一.Transportation industry Standard trailer support device JT/T476-2002
1. Static pressure test
Static load 4h
Vertically mounted to a dedicated test rig, the stroke is adjusted to the maximum, and a static pressure test load is applied for 4 h at the fast shift position.
Check the stability of the support device, whether it can be self-locking and whether the parts are damaged or deformed.
1.25 times 5 times
Vertically mounted to a dedicated test rig, 1.25 times the lift load is applied at the slow gear position, and the stroke is repeated 5 times from zero to maximum.
Measure the maximum stroke, the handle force at slow speed and the total stroke of 10 turns.