Overview

• Manufacturer: John Deere
• Product: AR48675 Thermostat (engine coolant thermostat)
• Purpose: Regulates coolant flow to maintain optimal engine operating temperature, ensuring reliable warm-up and preventing overheating in John Deere diesel engines and cooling systems.
• Typical opening temp: commonly listed as 180°F / 82°C in532 widely used references.
• Physical specs: compact 2.1 in height, 1.8 in length, lightweight approx. 0.12 lb.

Key Features

• Part Number: AR48675
• Type of machine: John Deere off‑highway and agricultural equipment with compatible cooling systems that require an 82°C/180°F thermostat.
• Installation tips: ensure engine is cool before replacement; drain cooling system; remove old thermostat and gasket; clean housing surface; install new thermostat with correct orientation; replace gasket or O‑ring; bleed air from cooling system; refill with coolant and test for leaks.
• Temperature activation: opens at 180°F (82°C) to regulate engine temperature range.

Compatibility

• Suitable machine models (range of John Deere engines): 110, 120D, 160, 200, 230C, 250D, 260E, 270, 300D, 300D-II, 300DW, 300WW, 310D, 310E, 315D, 330B, 330C, 335, 344G, 350P, 350D, 350G, 370, 370C, 380G, 410D, 430B, 435, 444E, 444G, 450, 450G, 450H, 455G, 490E, 510D, 530B, 535, 540E, 540G-II, 544E, 544G, 548E, 548G-II, 550, 550G, 550H, 555G, 570B.
• Alternative part numbers (equivalents observed in catalogs/retailers): VPE3406, RE48583, RE506300, RE522076, RE69581, DZ100555; additional references may include AR48675N, JD48675, 1446127M1.