The secondary reservoir one-way check valve is stuck closed The secondary reservoir one-way check valve is stuck open Static unbalance of a wheel assembly Static unbalance of a wheel assembly Which of the following conditions on an air brake system could cause a high discharge of oil from the supply reservoir drain value?!Ī restricted lubricating oil return passage in the compressorĬompressor drive belt slipping excessively A restricted lubricating oil return passage in the compressor While observing a truck's air-pressure gauges when building air pressure you notice the primary reservoir is fully charged but the secondary reservoir has zero air pressure. Separate the bead of the tire from the rimįracture the valve stem, allowing all of the air to escape Remove the Schrader valve core completely What could cause low-pressure readings when resting a hydraulic power steering system?!Ī bent or damaged pitman arm A worn hydraulic steering pump What could cause wheel tramp?! Remove the Schrader valve core completely Use a screwdriver to depress and hold the Schrader valve pin Hydraulic steering oil temperature is not important when testing The steering system oil should be at operating temperature What is the recommended method of deflating a truck tire?! The steering system oil should be at operating temperature
The engine oil should be at operating temperature The hydraulic steering system oil should be cold Incorrect toe settings Incorrect toe settings When testing a truck's hydraulic steering system, what is important to achieve accurate results?! Seized spring pins One or more broken leaf springs How are straight king pins secured to the axle on a truck's front steering axle?!Ī tapered cup and cone bearing A tapered draw key While observing tire wear patterns and front-end alignment, which alignment angle has the potential to cause the most tire wear?!
CAUSES OF WORN KING PINS DRIVER
Remove weight from the spring by using a jack Remove weight from the spring by using a jack What condition could affect ride height when inspecting spring equalizers on a tandem axle air suspension system?!Ī tie rod that is out of adjustment Worn equalizer bushings How is cushioning and alignment accomplished on a rubber cushion suspension system?!ĭrive pins are encased in rubber bushingsįrame hangers Drive pins are encased in rubber bushings A driver complains of truck wander when driving.
Never attach anything to the frame web Never drill or weld on the flange of the frame rail What should be done first when the spring shackle pin will not accept grease?! Never drill or weld on the flange of the frame rail Inadequate fifth-wheel lubrication Seized front spring shackle pins Which of the following is correct practice when mounting accessories to the heat-treated frame of a truck?! When the compressor begins its loaded cycle When more load is applied to the truck What must be performed on a truck suspension system to adjust torque rod length and drive axle alignment?!Īdjust the position of the spring hangers Remove or add washers (shims) What type of truck spring suspension system would be mounted above the main leaf spring assembly and only be utilized under heavy leads?!Ī coil spring suspension An auxiliary spring suspension What component is used to control jounce and rebound and suppress truck suspension system oscillations?!Ī helper spring A shock absorber When diagnosing a leaf spring suspension complaint of harsh ride which of the following could be the cause?! Mixture of light oil and diesel fuel Mixture of light oil and diesel fuel When will the ride height control valve supply more air to the air springs?! When installing a reinforcement plate on a truck frame, how should the bolt holes be located?!Īlong each edge of the plate In a staggered bolt pattern What should be used to lubricate the rack and slide path of a sliding fifth wheel?!
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