Adding Coolant

TS281-UN-15APR13

High-Pressure Fluids

CAUTION: Explosive release of fluids from pressurized cooling system can cause serious burns.

Shut off engine. Only remove filler cap when cool enough to touch with bare hands. Slowly loosen cap to first stop to relieve pressure before removing completely.

IMPORTANT: Never pour cold liquid into a hot engine, as it may crack cylinder head or block. DO NOT operate engine without coolant for even a few minutes.

John Deere Cooling System Sealer may be added to the cooling system to stop leaks. DO NOT use any other stop-leak additives in the cooling system.

Air must be expelled from cooling system when coolant is added.

1. Loosen temperature sending unit fitting at rear of cylinder head or plug in side of thermostat housing to allow air to escape when filling system.

2. IMPORTANT: When adding coolant to the system, use the appropriate coolant solution. See Diesel Engine Coolant (engine with wet sleeve cylinder liners) in the Fuels, Lubricants, and Coolant Section for mixing of coolant ingredients before adding to cooling system.

   Do not overfill cooling system. A pressurized system needs space for heat expansion without overflowing at top of coolant tank.

   Fill until coolant level touches bottom of coolant tank filler neck.

3. Tighten plugs and fittings when air has been expelled from system.