Note: If there is a question about the type of chain installed on the unit by contacting the Terex Utilities Technical Support team at 1-844-Terex4U (1-844-837-3948) or emailing them at
2021-05-04 — Danger. Failure to obey the instructions and safety rules in the appropriate. Operator's Manual and Service Manual for your machine will result in.
Tech Tips Service Call: Inspecting Leveling Chains on Units with Standard Chains Tools Required: Petroleum Base Solvent 30w Non-Detergent Oil Measuring Device Model(s): HR, HRX, TC, TCX, SC, SCM, XT, RM, and RMX Tech-Tip 58 Rev. B 1 Released: 5/4/2021 Tech Tips Tech Tip Safety Rules Danger Failure to obey the instructions and safety rules in the appropriate Operator's Manual and Service Manual for your machine will result in death or serious injury. Many of the hazards identified in the operator's manual are also safety hazards when maintenance and repair procedures are performed. Do Not Perform Maintenance Unless: · You are trained and qualified to perform maintenance on this machine. · You read, understand and obey: o manufacturer's instructions and safety rules o employer's safety rules and worksite regulations o applicable governmental regulations · You have the appropriate tools, lifting equipment and a suitable workshop. The information contained in this tech tip is a supplement to the service manual. Consult the appropriate service manual of your machine for safety rules and hazards. Tech-Tip 58 Rev. B 2 Released: 5/4/2021 Tech Tips Objective: This tech tip is for units equipped with standard leveling chains. Please reference the kit sheet for the specific unit to determine which chains are installed. Note: If there is a question about the type of chain installed on the unit by contacting the Terex Utilities Technical Support team at 1-844Terex4U (1-844-837-3948) or emailing them at utilities.service@terex.com. All Optima and XT Pro models are built with the extended life leveling chains. These chains require replacement after 10 years, there is not a requirement to remove and measure at 5 years. The inspection may require a light and mirror to accomplish properly. All chains require lubrication at 90-day intervals. The XT series may have standard or extended life leveling chains depending on the age and configuration. The XT Pro series only have extended life 10 year leveling chains. Consult the unit specific manual and ID Placard to determine whether the machine is an XT or an XT Pro. Tech-Tip 58 Rev. B 3 Released: 5/4/2021 Tech Tips Step 1 Leveling chains need to be visually inspected daily. The inspection intervals shown below are for reference only, refer to the unit specific maintenance manual for the correct inspection intervals. Tech-Tip 58 Rev. B 4 Released: 5/4/2021 Tech Tips Step 2 Daily Inspection Visually inspect the chain for any cracks, turned pins, or damage to the chain or links. If any damage or deformities are found, the chain must be replaced. If the chain is rusty or does not move freely it must be replaced. Turned Pin Clearance at Riveted Chain Pin Link Plate Distortion Expanding Crack Note: If any of the pin stamps appear to be turned on any chain, new or one in service, replace the chain immediately. Tech-Tip 58 Rev. B 5 Released: 5/4/2021 Tech Tips Step 3 5 Year Inspection The Terex standard leveling chains are required to be removed, inspected, and measured at 5year intervals. Consult your unit specific maintenance manual to determine the required interval and allowable wear limits for your unit. Lubrication The proper lubricant for chains is 30w nondetergent oil. Spray cans are available as part #471317 or use a container of 30w nondetergent oil and a brush to lubricate all rollers and pins. Tech-Tip 58 Rev. B 6 Released: 5/4/2021 Tech Tips Step 4 Remove the chains according to the instructions in the unit specific maintenance manual. The example below is for reference only. Tech-Tip 58 Rev. B 7 Released: 5/4/2021 Tech Tips Step 5 Clean the chains and remove any excessive build-up of oil, grease, or debris. Do not steam clean or use degreasers. Use a petroleum solvent, diesel fuel, or kerosene. Step 6 Using instructions in the unit specific maintenance manual, inspect the chain. The chain should not be stiff at any point, all links must move freely, and the chain must lay straight on the bench. Ensure all rollers spin freely, and check for any that are loose. Tech-Tip 58 Rev. B 8 Released: 5/4/2021 Tech Tips Step 7 Stretch the chain slightly and then measure the chain per instructions below to check for elongation. As the chain may not wear evenly, take several measurements along its length. If any one pin joint shows more wear and movement than other links, replace the chain. Tech-Tip 58 Rev. B 9 Released: 5/4/2021 Tech Tips Example using #80 chain: Chain stretched for measuring Measuring L1 dimension Measuring L2 dimension Tech-Tip 58 Rev. B 10 Released: 5/4/2021 Tech Tips Using the measurements in the pictures on the previous page: L1 = 9.399 L2 = 10.625 Length = (L1 + L2) / 2 Length = (9.399 + 10.625)/2 = 10.012 Standard Length = Chain Pitch x Number of links · Chain pitch for #80 chain reference the chart: 1.00 · 1.00 x 10 Links = 10.00 Chain Elongation = (Measured Length Standard Length) / Standard Length x 100% Chain Elongation = (10.012-10.000) / 10.000 = .0012 X 100% = .12% Tech-Tip 58 Rev. B 11 Released: 5/4/2021 Tech Tips Step 8 After measuring and calculating the elongation, consult the unit specific maintenance manual for the maximum allowable chain elongation. All dimensions are in inches. Using either the 10.012 or .12% values from the example and comparing to the chart below, the chain measured above can be lubed and put back in the unit it was taken out of. Tech-Tip 58 Rev. B 12 Released: 5/4/2021 Tech Tips Step 9 If any measured section is not within tolerance, replace the chain per instructions listed below. Always soak a new chain in 30w non-detergent oil overnight before installing it. Tech-Tip 58 Rev. B 13 Released: 5/4/2021 Tech Tips Step 10 Reinstall chains per the unit specific maintenance manual. The example below is for reference only. Step 11 After installing the chains, operate the unit through the full range of motion, then recheck the tension. Tech-Tip 58 Rev. B 14 Released: 5/4/2021Jason Julius Adobe PDF Library 21.1.182