Usage:
5130 (5ZL, 7TJ),
5230 (7LL) Excavators;
784B (5RK) Tractor;
785B (6HK),
789B (7EK),
793B (1HL),
793C (4AR) Trucks;
992G (7HR),
994 (9YF) Wheel Loaders And All Other Caterpillar Machines
Reference: Service Manual Module, SENR6059-03, "Vital Information Management System (VIMS)"
There is some confusion on the use of Service Meter Units (SMU) and Service Meter Hours (SMH) as parameters indicating service intervals.
Service Meter Units
The Service Meter Units (SMU) parameter is derived from a count of camshaft revolutions. In the past this was an indication service was needed based only on engine revolutions. This method is no longer used in production.
Service Meter Hours
The Service Meter Hours (SMH) parameter is an indication of engine running hours, which is determined by indicators such as:
-
- * Alt-R-Term.
- * Engine oil pressure.
- * Engine flywheel speed.
- * Alt-R-Term.
Service Meter Hours (SMH) is the parameter used to determine the appropriate service interval. On VIMS machines, the SMH shown in VIMS may not match the SMH on the electromechanical meter also used on most machines. VIMS hours are more acurate and should be used to determine the service interval.
Diagnostic Hours
Diagnostics hours increment only from battery on time for a given control. Diagnostic hours have no exact correlation to engine hours. They will be close, but always more than Service Meter Hours (SMH). Diagnostic hours are used to show a time relation between events that use this hour related time stamp.