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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
