TM 5-3805-280-24-2
UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES
FOR HYDRAULIC EXCAVATOR 230LCR/230LCRD
ITEM
INTERVAL
ITEM TO BE INSPECTED
EQUIPMENT IS NOT
NO.
PROCEDURE: DO THE PMCS AND HAVE ITEM
READY/AVAILABLE
REPAIRED, FILLED, OR ADJUSTED AS NEEDED
IF:
19
Quarterly
Check Valve Lash of Compressor Engine
(Refer to Annually Check and Adjust Engine Valve Lash)
20
Quarterly
Adjust Valve Clearances (4-Cylinder Engine)
NOTE: Firing order is 1-3-4-2.
A - No. 1 TDC compression stroke
B - No. 1 TDC exhaust stroke
C - Fan end of engine
(1) Adjust No. 1 and 3 exhaust valves and No. 1
and 2 intake valves.
VALVE CLEARANCE SPECIFICATIONS
Exhaust Valves (E)
0.46 mm (0.018 in.)
Intake Valves (I)
0.36 mm (0.014 in.)
(2) Rotate engine 360 and repeat step 1 for the
remaining intake and exhaust valves.
(3) Tighten jam nut to 27 Nm (20 lb-ft).
(4) Clean cylinder head and rocker arm cover
mating surfaces.
(5) Install rocker arm gasket. Do not use sealant on
gasket.
(6) Install rocker arm cover. Tighten screws to 35
Nm (26 lb-ft). Do not overtighten cap screws.
A-15
