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39 Cards in this Set
- Front
- Back
M915 used what semitrailers on line haul missions? |
M871 M872 M1062 |
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Gross vehicle weight rating |
52000 pounds |
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915 is equipped with |
2 way oscillating, sliding fifth wheel compatible with a 2 inch king pin |
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Maximum towed load on kingpin |
30000 lbs |
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Fully loaded 915 on class 1 road can maintain what speed on level road |
65mph and 29mph while ascending a 3 percent grade |
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Minimim turning diameter, curb to curb |
53ft 9in |
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Average cruising ranges GCWR with a full tank will vary based on what |
CONDITIONS e.g varying load prolong idle and climatic conditions |
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Optmal cruising range |
400 miles |
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Engine oil pressure measured in what unit |
PSI (KPa) |
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Engine oil normal pressure at rated speed 1200 rpm |
50 to 70 PSI (345-483 KPa) |
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Engine oil at idle speed 600 rpm |
15 PSI (100 KPa) minimum |
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Tachometer registers engine speed in RMP |
Maximum govern speed 2100 Idle speed 600 rpm |
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Primary air pressure gauge is registered in |
PSI in REAR BRAKE SYSTEM 90-120 normal operating range |
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Air pressure normal operating range |
90-120 (621-827KPa) |
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Secondary air pressure is registered in |
PSI FRONT brake system |
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Engine JAKE BRAKE selector switches |
2 4 or 6 cylinders 2 Left for 2 cylinder 4 Right for 4 cylinders 2 n 4 for 6 cylinders |
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Fifth wheel slide |
Permit repositioning of sliding 5th wheel from inside cab LOCK position- deactivate control valve n locks 5th wheel to baseplate UNLOCK- activate control valve to allow CHANGES |
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INter-axle lockout control valve lever |
Lock/unlock driveline based on driving conditions LOCK- in poor tracktion STOP VEHICLE place lever in lock position UNLOCK- when bak in normal conditions kove lever to unlock while moving |
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Parking brakes |
Diamond shaped knob operates parking valve |
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Trailer air supply |
Red octagonal shaped Push- charge trailer air supply/release trailer spring brake Pull- shut off air supply |
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LOW AIR PRESSURE WARNING LIGHT |
Red light +buzzer sound when either section of dual system fail below 65psi If in blackout only buzzer will go off |
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A5: ENGINE COOLANT TEMPERATURE |
Registered in degrees |
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Collosion warning system CWS |
Forward n side radar system Transmit/receive signal off objects to front and side of tractor |
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A5 Primary air pressure gauge "A" rear brake system |
Register in PSI Normal operating range between RED BANDS |
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'B' secondary air pressure gauges |
Register in PSI Front brake system Trailer and accessories NORMAL range RED BANDS |
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Transmission oil gauge |
Indicate transmission oil temperature in degrees Fahrenheit Normal range in green bands If needle goes to YELLOW or RED band STOP n investigate |
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A5 INTR AXLE LOCK/UNLOCK SWITCH |
Lock- stop vehicles press top of switch Unlock- 25mph or less turn off switch |
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ABS indicator light |
Yellow light come on when ignition is on Go out after 5-10 sec Buzzer wont go off if BO DROVE is on |
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Trailer ABS indicator light |
When coupled to abs equipped trailer YELLOW light on for abs failure |
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Transmission warning light |
REd light + buzzer comes on when temperature reaches 325F or 163C Buzzer will no go off if in BO drive |
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low air pressure warning light |
RED light +buzzer wen pressure falls below 65psi Light switch mus be in SER DRV STOP LIGHT OR PARK for buzzer to sound Buzzer wont go off in blackout drive |
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Engine BRAKES |
Switch in HIGH MEDIUM LOW A slowing device NOT a vehicle stopping device |
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Test operations for Engine brake |
Let engine warm up before turning on the engine brake switch Engine brakes uses engine oil to operate |
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Remove pressure from accelerator Observe engine braking operation |
Set switch to MEDIUM and HIGH for 4 to 6 cylinders |
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Engine brakes WARNING |
Do not use if road surface is slippery Using engine brake on wet icy or snow covered road could result in loss of vehicle control Failure to follow warning may result in death or equipment damage |
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Braking function Primary/secondary must be monitored |
Shid have 90-120 psi |
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Braking functions ops If air pressure falls below 65 psi |
Buzzer will go off |
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A5 engine coolant temp normal range |
190-225 °F |
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A5 engine oil pressure |
40-75 @rated speed 2100rpm 10 psi for idle speed |