Mack CHM 2010, Operator'S Handbook Manual

Page: 57 / 232

INSTRUMENTS AND CONTROLS 49
49. m DRIVE Control Panel 57. Load Light Switch
58. Differental Lockout Switch 67. Speed Control Switch
59. Parking Brake Valve 68. Wiper Switch
60. Optional Switch* 69. Optional Switch*
61. Trailer Air Supply Valve 70. Optional Switch*
62. Optional Switch* 71. Latch Switch
63. Suspension Height Switch 72. Power Mirror Switch
64. Optional Switch* 73. Optional Switch*
65. Optional Switch* 74. Optional Switch*
66. Driving Lights Switch 75. AUX/USB Port
* The switches shown in parentheses are listed in their likely position on the panel;
however, they may be at other switch locations depending on the customer’s
requirements. See “Function of Optional Switches”, page 58 for a description of the
optional switches, listed in alphabetical order.
1. Manifold Pressure Gauge (If Equipped) – Measures the charge air boost
pressure in the intake manifold.
2. Engine Oil Pressure Gauge – Indicates engine oil pressure. The normal
operating oil pressure for a MACK MP engine (at governed speed) is between 275.8
and 620.5 kPa (40 and 90 psi). At idling speed, the oil pressure should be between
275.8 and 413.9 kPa (40 and 60 psi).
3. Engine Coolant Temperature Gauge (SCR) – Indicates the temperature of the
engine coolant. The normal operating temperature for MACK engines is between
77°C and 107°C (170°F and 225°F). The driver will receive a warning if coolant
temperature reaches 106°C (223°F) and engine shutdown will occur at 108°C
(227°F) if the engine coolant temperature shut down option is enabled.