OM3020.3 02/01 Operation - Section 3 Instrument Panel & Indicator Lights Page 3-31 (23, Figure 3-6) AC DRIVE SYSTEM TEMPERATURE GAUGE The Ac Drive System Temperature Gauge indicates the drive system temperature. There are three colored bands: Green; Yellow; and Red. Green indicates “Normal” operation. Yellow indicates the system temperature is rising. There is also an amber (yellow) “tempera- ture warning” light in the overhead panel (C5, Figure 3-7) that will illuminate when the temperature exceeds a certain level. When this condition occurs, the operator should consider changing truck operation in order to reduce system temperature.
If the Ac Drive System Temperature should reach the Red band, continued operation could damage components in the system. Safely stop truck, shutdown engine, and notify maintenance personnel immediately. (24, Figure 3-6) HOURMETER The hourmeter registers the total number of hours the engine has been in operation. (25, Figure 3-6) HYDRAULIC OIL TEMPERATURE GAUGE The Hydraulic Oil Temperature Gauge indicates oil temperature in the hydraulic tank. There are two colored bands: Green, and Red. Green indicates “Normal” operation. Red indicates high oil temperature in the hydraulic tank. Continued operation could damage components in the hydraulic system.
There is also a RED “temperature warning” light in the overhead panel (D5, Figure 3-7) that will illuminate when the temperature exceeds a certain level. If this condition occurs, the operator should safely stop the truck, move Selector Switch to Neutral, apply the Park Brake, and operate engine at 1200 - 1500 RPM to reduce system temperature. If temperature gauge does not move into the Green range after a few minutes, and the RED overhead indictor light does not go out, notify maintenance personnel immediately. (26, Figure 3-6) REST SWITCH The “REST” switch is a “rocker”-type switch with a locking device for the “Off” (left side) position.
When the switch is in this position, a small black tab must be pushed to the left to “unlock” the switch, so that it can be depressed (rocked) to the “On” (right side) position. When the switch is in the “On” position, the switch is illuminated with a yellow/amber light. An amber (yellow) indicator light in the overhead panel (B6, Figure 3-7) will also be illuminated when the “REST” state has been requested and entered. The “REST” switch should be activated (turned “On”) to de-energize the AC Drive System whenever the engine is to be shutdown, or the truck parked for a length of time with the engine running.
The Selector Switch must be in neutral and the vehicle not moving to enable this function. This will allow the engine to continue running while the AC Drive System is de-energized. Activation of the “REST” switch alone does NOT com- pletely ensure that the Drive System is safe to work on. Refer to Safety Procedures, and check all “LINK-ON”, or “LINK ENERGIZED”, indicator lights to verify the AC DRIVE system is DE-ENERGIZED before before performing any maintenance on the Drive System. DO NOT ACTIVATE THE REST SWITCH WHILE THETRUCK IS MOVING! The truck may unintentionally enter the REST mode after stopping.