Operation - Section 3 OM3005.3 7/96 Page 3-18 Instrument Panel and Controls (23) Transmission Temperature (26) Engine Oil Pressure The transmission temperature gauge indicates the temperature of the transmission oil during opera- tion. Maximum operating oil tem- perature is 250 o F (121 o C). If oil temperature exceeds this maxi- mum, CHECK TRANS light (35) will turn on. As quickly as safety will permit, bring the truck to a complete stop away from traffic, move trans- mission range selector to "Neutral", apply the parking brake, and run engine at high idle. Continue to run engine at high idle until transmission oil temperature cools to below 250 o F (121 o C).
If temperature does not return to this range within a few minutes, report the condition immediately to maintenance personnel and wait for further instructions before moving truck. The engine oil pressure gauge indi- cates engine lube oil pressure. Normal operating pressure after engine warm-up should be: Low idle; 20 psi (138 kPa), Rated speed; 45 to 70 psi (310 to 483 kPa). If engine oil pressure falls below 6 psi (41 kPa) , Engine Oil Pressure light (46) will turn on. As quickly as safety will permit, bring the truck to a complete stop away from traffic, move transmission range selec- tor to "Neutral", apply the parking brake, and shut down engine.
Report the condition immediately to mainte- nance personnel and wait for further instructions be- fore moving truck. (27) Brake Oil Temperature (24) Water Temperature The brake oil temperature gauge in- dicates the temperature of the rear brake cooling oil during operation. Maximum operating oil temperature is 250 o F (121 o C). If oil temperature exceeds this maximum, Brake Oil Temperature Warning light (48) will turn on. As quickly as safety will permit, bring the truck to a complete stop away from traffic, move trans- mission range selector to "Neutral", apply the parking brake, and run engine at high idle.
Continue to run engine at high idle until Brake Oil Temperature Warning light turns off and brake oil temperature cools to below 250 o F (121 o C). If temperature does not return to this range within a few minutes, report the condition imme- diately to maintenance personnel and wait for further instructions before moving truck. The engine water temperature gauge indicates the temperature of the coolant in the engine’s cooling system. The temperature range af- ter engine warm-up and truck oper- ating under normal conditions, should be 165 o to 195 o F (74 o to 91 o C). If water temperature exceeds 200 o F (93 o C), Coolant Temperature light (43) will turn on.
As quickly as safety will permit, bring the truck to a complete stop away from traffic, move transmission range selec- tor to "Neutral", apply the parking brake, and shut down engine. Report the condition immediately to mainte- nance personnel and wait for further instructions be- fore moving truck. (25) Transmission Oil Pressure The transmission oil pressure gauge indicates main pressure in the trans- mission clutch apply circuit. Normal operating pressure after warm-up should be 170 to 210 psi (1172-1448 kPa).
If transmission oil pressure falls below this range with engine operating at 800 RPM or higher, bring the truck to a complete stop safely away from traffic, move transmis- sion range selector to "Neutral", apply the parking brake, and shut down engine. Report the condition immediately to maintenance personnel and wait for further instructions before moving truck. (28) Voltmeter The voltmeter indicates the output voltage of the battery charging al- ternator. Normal indicated voltage at high idle is 27 -- 28 volts. When the key switch is "On" and engine is not running, the voltmeter indicates battery voltage.
(29) Speedometer The speedometer indicates the truck speed in miles per hour (MPH) and kilometers per hour (km/h).