(23) TRANSMISSION TEMPERATURE The transmission temperature gauge indicates the temperature of the transmission oil during operation. 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 transmission 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. (24) WATER TEMPERATURE The engine water temperature gauge indicates the temperature of the coolant in the engine’s cooling system. The temperature range after engine warm-up and truck operating 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 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. (25) TRANSMISSION OIL PRESSURE The transmission oil pressure gauge indicates main pressure in the transmission 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 transmission 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. (26) ENGINE OIL PRESSURE The engine oil pressure gauge indicates 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 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. HB5-6 Instruments and Controls HB5014 4/94