Ramp up on control valve solution.Mechanics, replacing a failed ramp control valve A device that modulates the flow of fluid in a conduit in response to a signal from a process measurement control system. on an M113A3 vehicle can cause even more problems if it's it's 1. Contraction of it is. 2. Contraction of it has. See Usage Note at its. it's it is or it has it's be ~have not done right. That starts with getting the right replacement valve. The Problem The old-style ramp control valve, NSN NSN National Stock Number NSN Nokia Siemens Networks NSN National Storytelling Network NSN NATO Stock Number NSN New Substances Notification (CEPA) NSN National Student Number (NZ) NSN Never Say Never 4820-00-158-5411, had external relief valve and was replaced in the early '90s. The replacement valve, NSN 4820-01-411-1225, has an internal relief valve built into it. The old-style valve was deleted Deleted A security that is no longer included on a specified market. Sometimes referred to as "delisted". Notes: Reasons for delisting include violating regulations, failing to meet financial specifications set out by the stock exchange and going bankrupt. from the supply system and parts manuals. Trouble is, there are still some vehicles that have these valves installed. When these valves fail, some mechanics find it easier to pull the part number from the failed valve and use it to order a new one. Big mistake. The old part number crosses to yet another relief valve, NSN 4820-00-825-5720. This is an adjustable valve that has a pressure limit ranging from 2,300 to 3,800 psi PSI - Portable Scheme Interpreter . You won't get instructions on how to adjust the valve. Most mechanics won't even realize the valve has to be adjusted to 2,300 psi to work. The result? Ramp failure due to the extreme hydraulic pressure that exceeds what the ramp cylinder cylinder, in mathematics, surface generated by a line moving parallel to a given fixed line and continually intersecting a given fixed curve called the directrix; each line of the family of lines forming the cylinder is called a ruling, or generator. can handle. The Solution Mechanics, break the habit of ordering from part numbers on failed parts. If you go to the parts TM, you'll find the most up-to-date and approved parts for your repair job. It's also a good idea to go ahead and replace all those old external valves now to head off problems later. Order the correct ramp control valve, NSN 4820-01-411-1225. Then turn to WP 0660 00 in TM 9-2350-277-20-5. It tells how to remove the old hydraulic ramp control handle, hydraulic lines, and external valve first. Then it explains how to install the new ramp control valve. |
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