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Lift Motor Troubleshooting
⚙️ Motor Issues🔧
🔍 Possible Causes:
🔴1️⃣ Fuse is burnt or breaker is tripped
🔴2️⃣ Incorrect voltage to the motor
🔴3️⃣ Loose or faulty wiring connections
🔴4️⃣ "Up" button is defective
🔴5️⃣ AC Contactor is defective
🔴6️⃣ Overhead or lower limit switch is faulty
🔴7️⃣ Motor windings burned out
🛠️ Remedies:
🟢1️⃣ Replace the fuse or reset the circuit breaker (Use ‘C’ or ‘D’ rated breaker of the correct amperage)
🟢2️⃣ Supply the correct voltage to the motor
🟢3️⃣Repair, replace, insulate, and tighten all wires
🟢4️⃣ Replace the “Up” button
🟢5️⃣ Swap out the AC contactor
🟢6️⃣ Replace the overhead or lower limit switch
🟢7️⃣ Install a new motor
🔍 Possible Causes:
🔴1️⃣ Start capacitor is defective (for 1-phase motors only)
🔴2️⃣ AC Contactor is faulty
🛠️ Remedies:
🟢1️⃣ Replace the start capacitor (for 1-phase motors)
🟢2️⃣ Swap out the AC contactor
🔍 Possible Causes:
🔴1️⃣ Plugged oil filter screen
🔴2️⃣ Cracked or loose oil suction tube
🔴3️⃣ Lowering valve stuck open
🔴4️⃣ Low hydraulic oil level
🔴5️⃣ Oil pump not priming
🛠️ Remedies:
🟢1️⃣Clean or replace the oil filter screen
🟢2️⃣Replace or tighten the oil suction tube
🟢3️⃣Clean or replace the lowering valve
🟢4️⃣Refill the hydraulic oil (Refer to the owner’s manual)
🟢5️⃣Replace the oil pump
🔍 Possible Causes:
🔴1️⃣ Debris in the lowering valve
🔴2️⃣ Motor running on low voltage
🔴3️⃣ Pressure adjust valve out of calibration
🔴4️⃣ Lift is overloaded
🛠️ Remedies:
🟢1️⃣ Clean or replace the lowering valve
🟢2️⃣ Ensure the motor receives the correct voltage
🟢3️⃣ Adjust or replace the pressure adjust valve
🟢4️⃣ Verify the weight limit & ensure even distribution
🔍 Possible Causes:
🔴1️⃣ External hydraulic oil leak(s)
🔴2️⃣ Debris in the lowering valve
🔴3️⃣ Debris in the check valve
🛠️ Remedies:
🟢1️⃣ Repair any hydraulic leaks
🟢2️⃣ Clean or replace the lowering valve
🟢3️⃣ Clean or replace the check valve
🔍 Possible Causes:
🔴1️⃣ Air mixed with hydraulic oil
🔴2️⃣ Loose oil-return tube
🔴3️⃣ Overfilled hydraulic system
🛠️ Remedies:
🟢1️⃣ Repair external leaks
🟢2️⃣ Clean or replace the lowering valve
🟢3️⃣ Clean or replace the check valve
🔍 Possible Causes:
🔴1️⃣ Air and oil mixing (causing foamy oil cavitation)
🔴2️⃣ Loose power unit mounting bolts
🔴3️⃣ Worn-out motor coupling
🔴4️⃣ Clogged oil filter screen
🛠️ Remedies:
🟢1️⃣ Change old hydraulic oil with fresh oil
🟢2️⃣ Tighten power unit mounting bolts
🟢3️⃣ Replace motor coupling
🟢4️⃣ Clean or replace the oil filter screen
🔍 Possible Causes:
🔴1️⃣ Low hydraulic oil level
🔴2️⃣ Cracked or short oil suction tube
🛠️ Remedies:
🟢1️⃣ Add more hydraulic oil
🟢2️⃣ Replace the oil suction tube
