Fault Phenomenon: Oil&Steel 4018 scissor lift aerial work platform when lifting, the hydraulic cylinder piston rod is bent, unable to extend/retract.

Troubleshooting Process:
– Checked load: severe off-center loading.
– Checked impact: lateral impact on boom.
– Checked guidance: guidance failed.
– Checked material: insufficient material strength.

Root Cause: Severe off-center loading or lateral impact caused the piston rod to bend.

Required Parts: Hydraulic cylinder piston rod straightening or replacement.