REFERENCE ONLY N '" ~ Cl a: IMPORTANT: ALWAYS maintain coolant at correct level and concentration. DO NOT operate engine without coolant for even a few minutes. See ENGINE COOLANT SPECIFICATIONS earlier in this section for proper mixing of coolant ingredients before adding to the cooling system. RG.1B293.REQ4A ·19·09AUG94 140497 PN=33 REPLENISHING SUPPLEMENTAL COOLANT ADDITIVES (SCA'S) BETWEEN COOLANT CHANGES If frequent coolant make-up is required, the glycol concentration should be checked with JT05460 Refractometer to assure that the desired freeze point is maintained. Follow manufacturer's instructions provided with refractometer. Fuels, Lubricants, and Coolant 25 ~ a: Q. « N N Z =?
Through time and use, original additives eventually lose their effectiveness and must be recharged with additional supplemental coolant additives available in the form of liquid coolant conditioner. NOTE: Service intervals listed are a recommended engineering guideline. Refer to your vehicle operator's manual for a specific service interval. Perform a COOLSCAN analysis after 900 hours or 1-1/2 years of operation when using John Deere Prediluted Antifreeze/Summer Coolant, and after 600 hours or 6 months of operation when using all other John Deere coolant products.
If a COOLSCAN analysis is not available, recharge system per instructions printed on label of TY16004 John Deere Liquid Coolant Conditioner.