UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES
FOR HYDRAULIC EXCAVATOR 230LCR/230LCRD
ITEM TO BE INSPECTED
EQUIPMENT IS NOT
PROCEDURE: DO THE PMCS AND HAVE ITEM
REPAIRED, FILLED, OR ADJUSTED AS NEEDED
(17) Tighten vent plug.
Check Coolant Conditioner
WARNING: Explosive release of fluids from
pressurized cooling system can cause serious
Remove filler cap only when engine is cold or
when cool enough to touch with bare hands.
Slowly loosen cap to first stop to relieve pressure
before removing completely.
CAUTION: John Deere Liquid Conditioner
does not protect against freezing. Coolant
conditioner prevents rust, scale, and liner
NOTE: Check coolant every 500 hours or 3
months, or when replacing 1/3 or more
coolant. Add coolant conditioner as necessary.
(1) Turn cap slowly to release pressure and remove
cap. Test coolant solution using one of the
3-Way Heavy-Duty Coolant Test Kit
(TY161775) Coolant test strips provide an
effective method to check freeze point and additive
levels of engine coolant. Follow instructions on kit.