Why Does My Pallet Jack Won't Lift?

If your pallet jack won’t lift, it could be due to various mechanical or hydraulic issues. Here's a breakdown of common causes and how to troubleshoot them:

1. Insufficient Hydraulic Oil  

The hydraulic system in a pallet jack relies on oil to generate the pressure needed to lift.  

- Symptoms: The handle pumps, but the forks do not rise.  

- Solution: Check the hydraulic oil level and refill it with the correct type of oil if it's low. Inspect for leaks in the system that might be causing the oil to deplete.  

2. Air in the Hydraulic System  

Air can get trapped in the hydraulic system, preventing proper pressure buildup.  

- Symptoms: Forks lift sluggishly or not at all.  

- Solution: Bleed the hydraulic system by pumping the handle multiple times while holding the lowering lever open. This process helps remove air pockets.  

3. Overloaded Pallet Jack  

Every pallet jack has a maximum load capacity. Exceeding this limit can prevent it from lifting.  

- Symptoms: The forks won’t lift or lift partially under heavy loads.  

- Solution: Check the load weight and ensure it is within the rated capacity of your pallet jack.  

4. Worn-Out Hydraulic Pump Seals  

Over time, seals in the hydraulic pump can wear out or crack, leading to loss of pressure.  

- Symptoms: Hydraulic oil leaks, and the forks don’t lift even with proper oil levels.  

- Solution: Replace damaged seals or consult a professional for repairs if the damage is extensive.  

5. Malfunctioning Release Valve  

The release valve controls the lowering mechanism of the forks. If it is stuck or improperly adjusted, the hydraulic system won’t hold pressure.  

- Symptoms: Forks fail to lift, or they drop immediately after lifting.  

- Solution: Check and adjust the release valve. Ensure it is not stuck in the "open" position.  

6. Handle Linkage Issues  

The handle mechanism connects to the hydraulic pump. If the linkage is loose, misaligned, or broken, it can prevent lifting.  

- Symptoms: The handle feels loose or unresponsive.  

- Solution: Inspect the handle and linkage for damage or misalignment. Tighten or replace parts as needed.  

7. Debris or Blockages  

Dirt, debris, or foreign objects can obstruct the hydraulic system or moving parts of the pallet jack.  

- Symptoms: Difficulty in pumping the handle or lifting the forks.  

- Solution: Clean the hydraulic unit and inspect for any blockages. Lubricate moving parts to ensure smooth operation.  

8. General Wear and Tear  

If the pallet jack is old or heavily used, components like the pump, seals, or valves may have degraded.  

- Symptoms: Overall performance issues with lifting and lowering.  

- Solution: Regular maintenance is key. Replace worn-out components or consider investing in a new pallet jack if repairs are too costly.  

Preventative Maintenance Tips  

- Regularly check and refill hydraulic oil.  

- Inspect for leaks or damaged components after every use.  

- Clean and lubricate the pallet jack periodically to prevent dirt buildup.  

- Avoid overloading the jack beyond its rated capacity.  

By identifying the root cause and addressing it promptly, you can restore your pallet jack's functionality and extend its lifespan. If issues persist, consulting a professional technician might be the best option.

Established in 1992, Shanghai Yiying Crane Machinery Co., Ltd. has dedicated itself to the design and manufacturing of various lifting products, including pallet jacks, manual chain hoists, lever hoists, and electric hoists. With close to two decades of experience, our company has excelled in the realms of design, production, sales, and service, cementing our position as one of the premier pallet jack manufacturers globally.Visit our website at www.hugoforklifts.com to learn more about our products. For inquiries, you can reach us at HUGO002@YIYINGGROUP.COM.