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:
49
Annually
Check Engine Speeds
(1) Warm engine to normal operating temperature.
(2) Connect a tachometer to check engine speeds.
(3) Turn engine rpm dial to slow idle to check slow
idle speed.
(4) Turn engine rpm dial to fast idle to check fast
idle speed.
SPECIFICATIONS
900 25 rpm
Slow Idle
2180 25 rpm
Fast Idle in Standard Mode
50
Annually
Perform Engine Speed Learning Procedure
(1) Stop engine.
(2) Push engine learning switch (C) up to top
position. Make sure that it is in the top position.
(3) Turn key switch ON. Wait 5 seconds.
(4) Turn key switch OFF. Wait 5 seconds.
(5) Push engine learning switch to middle position.
(6) Check engine speeds.
SPECIFICATIONS
900 25 rpm
Slow Idle
1200 25 rpm
Auto Idle
1980 25 rpm
E (Economy) Mode
2180 25 rpm
Fast Idle in Standard Mode
NOTE: If engine RPM is not to specifications,
contact direct support maintenance.
A-38
