Product Description
ZERK
Frequently Asked Questions
Q: What is a zerk fitting and what is the MI 1009498 used for?
A: The MI 1009498 is a zerk fitting (grease nipple) used on Mitsubishi electric lift trucks. Zerk fittings are quick-connect ports that allow technicians to inject grease into bearings, joints, and pivot points using a grease gun. This fitting is typically mounted on mast assemblies, steering mechanisms, and load wheel brackets to enable regular bearing lubrication.
Q: Which electric lift truck components use the MI 1009498 zerk fitting?
A: The MI 1009498 is found in mast assemblies, load wheel suspensions, steering pivot points, and hydraulic actuator bearings on Mitsubishi electric lift trucks. Verify your equipment model and maintenance diagram to locate all zerk fittings requiring regular lubrication. Multiple zerks may be present at different service intervals.
Q: What is the thread size and connection specification of the MI 1009498?
A: The MI 1009498 zerk fitting uses a standard 1/8 inch NPT (National Pipe Thread) connection, which is the common industrial standard for grease gun nipples. Always verify the thread size from your equipment documentation or existing fitting before ordering replacement zerks to ensure proper fit and leak-free connection.
Q: What grease type should be used with the MI 1009498 zerk fitting?
A: Use a lithium-complex or NLGI Grade 2 general-purpose grease rated for bearing and articulation point lubrication. Consult your equipment manual for specific grease specifications and viscosity. Do not use water-resistant greases in applications requiring regular washdown unless specifically approved by Mitsubishi.
Q: How is the MI 1009498 zerk fitting installed and maintained?
A: The MI 1009498 threads directly into the component body. A spring-loaded ball check valve inside the fitting allows grease injection but prevents backflow. Periodically inspect the fitting for corrosion or blockage. If grease backs out around the fitting during lubrication, the internal seal may be damaged and the zerk should be replaced.
Q: What material is the MI 1009498 zerk fitting made from and how durable is it?
A: Mitsubishi OEM zerk fittings are typically brass or steel with zinc plating to resist corrosion. In wet or salt-air environments, the plating deteriorates over time. A corroded or cracked zerk fitting must be replaced to prevent grease contamination from entering the bearing. Stainless steel replacement zerks offer extended durability in harsh conditions.