John Deere — Check and Service Cooling System
Maintenance · Engine tune-up and break-in
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- Explosive release of fluids from pressurized cooling system can cause serious burns.
Procedure
- Remove trash accumulated on or near radiator.
- Visually inspect entire cooling system for leaks or damage.
- Remove foam filters from weep holes in water pump housing and inspect for restrictions.
- Insert heavy gauge wire into weep holes to make sure holes are open.
- Install new foam filters flush with pump housing.
- Remove and check thermostats.
- Drain and flush cooling system.
- Fill cooling system with coolant.
- Run engine until operating temperature and check for leaks.
- After engine cools, check coolant level.
- Check system for holding pressure.
Tools required
- Heavy gauge wire Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Coolant level approximately 19 mm (3/4 in.) below bottom of radiator filler neck
Source: John Deere service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.