For lubricating the mast rails of reach trucks, it's essential to use the right type of grease to ensure optimal performance and protection against wear. Here are the recommended types of grease:

### Recommended Grease Types for Mast Rails

1. **Lithium-Based Grease**
- **Description:** This is a common type of grease that provides good lubrication properties and is resistant to water and heat.
- **Benefits:** Offers excellent stability and protection against rust and corrosion, making it suitable for the demanding conditions of mast rails.

2. **Multi-Purpose Grease**
- **Description:** A versatile grease that can be used for various applications, including mast rails.
- **Benefits:** Generally provides good adhesion and resistance to water, making it effective for protecting moving parts in a reach truck.

3. **Heavy-Duty Grease**
- **Description:** Specifically formulated for high-load applications, this grease can withstand heavy pressure and high temperatures.
- **Benefits:** Excellent for mast rails, especially in environments where the truck is subjected to heavy loads and frequent operation.

### Key Specifications to Look For
- **NLGI Grade:** Typically, a grease with an NLGI grade of 2 is recommended for mast rails, as it provides a good balance of consistency and flow.
- **Temperature Range:** Ensure the grease can operate effectively within the temperature ranges expected in your working environment.
- **Water Resistance:** Look for grease that has good water resistance to protect against moisture and prevent washout.

### Summary
- **Lithium-based grease** is often recommended for mast rails due to its stability and corrosion resistance.
- **Multi-purpose or heavy-duty grease** can also be effective, especially for high-load applications.
- Always refer to the manufacturer's recommendations in the operator's manual to confirm the best type of grease for your specific model.
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