What type of oil should be used in a forklift's transmission?
2 Answers
Forklift transmissions should use No. 8 hydraulic transmission oil. Below are the operating specifications for forklifts: 1. Operators should be familiar with all aspects of the loader's performance: Before operating and performing tasks, operators should thoroughly understand the loader's various performance characteristics, structure, technical maintenance requirements, and operating methods, and should operate accordingly. 2. Only the cab is for passengers: Except for the cab, no other part of the machine should carry passengers. 3. Never pass the bucket over the top of a vehicle's cab: When unloading materials into a vehicle, the bucket must be raised to a height where it will not touch the vehicle's side panels. Care must be taken to prevent the bucket from hitting the vehicle, and it is strictly prohibited to pass the bucket over the top of a vehicle's cab.
I have been working in forklift maintenance for many years and often encounter transmission issues. The transmission oil for forklifts isn't just any oil—it requires specialized oil, such as gear oil or ATF (Automatic Transmission Fluid), depending on the model. Manual transmission forklifts typically use gear oil of API GL-4 or GL-5 grade, with viscosity like SAE 80W-90, while automatic ones might use ATF-type oil. Using the wrong oil can cause severe gear wear, overheating, or shifting problems, leading directly to transmission failure. During maintenance, I always check the vehicle manual first to confirm the oil type; if no manual is available, I look for the manufacturer's label. Draining the old oil thoroughly, cleaning the filter, and then adding new oil is essential, ensuring the oil level stays between the dipstick marks. Regular checks every 500 working hours are crucial—if the oil turns black or contains metal particles, it must be replaced immediately. By the way, in colder climates, winter-grade oil can prevent thickening. Proper oiling ensures smooth and durable forklift operation.
