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
NOTE: Visually inspect contact surfaces of
valve tips and rocker arm wear pads. Check
all parts for excessive wear, breakage, or
cracks. Replace parts that show visible
Rocker arms that exhibit excessive valve
clearance should be inspected more
thoroughly to identify damaged parts.
(2) Remove plug (A). Install JDG 820 Flywheel
Turning Tool. Remove cap screw (B). Install
JDE-81-4 Timing Pin.
(3) Turn flywheel until timing pin goes into
(4) Using engine rotation tool, rotate engine
flywheel in running direction (clockwise
viewed from front) until No. 1 cylinder is at
"TDC" Compression stroke.
If No. 1 cylinder rocker arms are loose, the engine
is at No. 1 "TDC" Compression. If No. 1 cylinder
rocker arms are not loose, rotate engine one full
revolution (360°) to No. 1 "TDC" Compression.
To change piston position, remove timing pin and
(5) Check and adjust valve clearance to
specifications as directed in following