QS-100 Aerial Ladder Flashcards by Preston Newman

The LTI QS-100 aerial ladder is a 4 section, all rectangular tubular steel, welded construction, ___ pound tip load,

250

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__” handrails and

___” diameter K-braced rungs

spaced __” on center with replaceable rung covers.

1-1/2

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retracted length of the aerial ladder is ___’ and the extended length is 94’. The elevated height of the aerial is 100’.

31.8

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The ladder elevation ranges from __ to +__ degrees

4 to + 75 degrees

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The hydraulic pump is an axial piston, variable displacement type pump with a capacity of ___ gpm.

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Hydraulic oil is supplied from an all steel reservoir with a capacity of ___ gallons.

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An antifriction ball bearing and ring gear attach the aerial to the chassis; thus providing 360 degree continuous rotation.

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Rotation is achieved through a planetary gear reduction drive powered by a hydraulic motor. An automatic disc-type brake is used to stop the rotation of the aerial.

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Extension and retraction of the aerial is provided by dual, extension/retraction cylinders and cable-drive combination.

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A power take off (PTO) unit is mounted on the transmission. Transmission fluid goes to the PTO when the power take off switch is turned on. A clutch within the PTO engages
the shaft that transfers power to the hydraulic pump. The PTO transmits the mechanical force developed by the engine to drive the main hydraulic pump.

reference

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The variable displacement type pump will create ___ psi and approximately __ gpm.

2800

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A variable displacement pump operates on what could be defined as a supply and demand principle. Pressure will increase in the circuit to that required for moving the actuators and performing elements, integral of the pump, and will not allow pressure to build up beyond the circuit’s operating requirement. Relief valves also protect components from damage due to excessive pressure build up.

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The hydraulic oil reservoir is an all steel welded construction with removable clean out access, integral baffles, filter, and strainer; gated suction, drain valves and magnetic drain plugs. Capacity is ___ gallons.

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The aerial main control valve opens to let hydraulic fluid to the aerial control spool valves. The aerial main control valve opens when the _____ is depressed or the
emergency blocking valve solenoid is actuated.

dead-man

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The three aerial control spool valves are mechanically linked to the aerial control levers. (Hoist, rotate, extend)

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The aerial power switch when turned on provides primary aerial systems and accessories with electrical power. Electrical power is supplied by the tractor’s electrical system. The aerial electrical system is a single wire; negative ground return type, utilizing the apparatus frame as ground.

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The power take off (PTO) switch is an electric switch that energizes a solenoid, which
allows transmission fluid to the PTO. The switch will not be energized until the
transmission is in the neutral position, and the parking brake is set.

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A pressure switch mounted on the PTO senses pressure inside the PTO and energizes the PTO engaged indicator light adjacent to the PTO switch.

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Activating and holding the switch in the on position activates the emergency power unit during _____ or _____ failure. The electric switch is wired to work even with the battery switch off.

electrical or hydraulic

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Personnel on the ladder should maintain a distance of ___ feet apart.

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Restraining the front axle provides additional friction to prevent movement (walking) of the apparatus on its outrigger system. This is particularly important when operating on uneven terrain.

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Never set the outrigger jack over a storm drain or manhole cover. Also, beams should not bridge the street and the curb.

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Capacities are based on all weight being removed from the vehicle springs, with the load forces being absorbed by the aerial torque box and chassis frame.

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Position the ladder approximately ___ inches to ___ inches above the objective.

6 to 12 inches

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Never use the aerial ladder to pull or push sideways or use as a ram.Never use the aerial ladder to pull or push sideways or use as a ram. Do not use the aerial as a crane.

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Always keep the aerial at least ___ feet away from all wiring. If the aerial should contact power lines, all personnel should remain on the apparatus until power is shut off or aerial is freed.

Even though the amount of voltage present plays an important part it is actually the amount of current (amps) passing through the body which determines the severity of injury.

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Do not operate with ladder elevated in wind conditions exceeding ___ mph.

Load capacities are established at maximum permissible extension and operation throughout 360 degrees, with outriggers fully extended and set, turntable level (within ___), ladderpipe drained and with the aerial ladder unsupported.

6% - 3.5 degrees (6 ft. rise within 100 ft.).

On street grades between ___% and ___% (___ degrees and ___ degrees), capacities are reduced by 50% (one-half).

6% and 14% (3.5 degrees and 8.0 degrees)

Operating on street grades in excess of ____ is prohibited.

14% - 9 degrees

Fast Idle Switch - When actuated a preset engine speed of _____ is obtained.

1500-1600

A 0-____ psi pressure gauge is piped directly into the outrigger valve bank.

5000

Outrigger system relief valve relieves at ____ psi.

2000

Pressure to hoist should not exceed _____ psi

2800

Pressure to rotate should not exceed _____ psi

1500

Pressure to extend should not exceed _____ psi

2000

Manual Circuit Selector - In the event of an electrical failure, the outrigger controls and the aerial controls will become disabled because of the interlock system. The circuit selector requires a quarter turn to the left or right for engagement.

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Manual Circuit Selector -- The EPU needs to be activated if there was also a hydraulic failure.

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In the lower position, it is used to power the ladder into the cradle (___ - psi).

800

A floating ball-type angle indicator calibrated from -20 degrees to + 80 degrees

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Located along the handrails of the main section are extension indicators marked off in 5-foot increments.

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Located in the center of the fly section of the ladder is the 10' aluminum folding ladder brackets.

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Even though aerial operation is permissible with the tiller trailer in line, optimum stability is attained with the trailer jack-knifed away from the working side.

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Conditions favorable to operating over the rear. (Over the rear operation is defined as angles up to and including ___ degrees to either side of the apparatus centerline). Over the rear affords the most stable operating position for the aerial.

Greatest reach is attained over the side, however, stability is reduced in this configuration. Best stability is over the rear, within the rear tire tracks.

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Outrigger fully deployed spread 1993 to 2001 --- 2001 to 2009 ---

93-01 = 16 feet 01 to 2009 = 14 2001 had both 16 and 14

The chock block should be positioned in front and behind both front tires. If on a hill, place on the downhill side of the front and tiller tires.

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The fast idle switch at the outrigger control box must be turned off or high idle is maintained throughout aerial operations.

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Jack control switches operate only after beams are fully extended or interlock override switch is used to short jack.

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The beam control switches may be operated simultaneously, but this is not recommended. Beam control and jack control switches shall be operated as a single function to watch each beam and jack extend and/or retract.

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When all switches are activated for a particular outrigger, its green light, at the outrigger control box, will light at ___ lbs.

800

If at anytime the road transmission is shifted into gear while performing aerial operations, the Chelsea Hot Start will automatically disengage the PTO.

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The proper method for deployment of the outriggers is to relieve the weight from the tractor’s rear springs allowing the frame and aerial support structure to assume the operating load.

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When operating on slopes or slippery terrain, keep one set of braking tires (wheels with air-actuated, spring brake applied brakes) firmly on the ground.

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Extend down low side jack until bubble in the aerial leveling indicator moves just past level (___”). The fully deployed light should be illuminated for that side and the weight removed from the tractor's rear springs by taking the bulge out of the duals, but not off the ground.

1/8"

Choose a hole that is a minimum __” below jack skirt. Fully insert manual locking pin and then back pin out __”

1/4" 1/2"

Rear tractor tires must remain in contact with the ground. If the apparatus cannot be leveled without raising the tires, do not level and operate within the reduced capacities. Front (steering) axle tires must remain in contact with the ground.

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With all green lights illuminated, electrical power is available for use of the aerial. After the ladder has been taken out of the cradle, any movement of the outriggers will not affect aerial operations.

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The outrigger interlock override system is designed to allow use of the aerial in situations where lives are at risk and no other options are available. The system allows the outrigger, on the side opposite where the aerial is to be used, to be “short-jacked”, or not fully extended in the horizontal direction.

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Use of the aerial while in an override situation MUST be limited to the area parallel with the truck forward, to parallel with the truck rearward, and on the side opposite of the “not fully deployed” outrigger..

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Prior to actuating the applicable button(s) on the outrigger valve bank, the 4 way solenoid handle must be pulled and held in the actuated position, for the duration of the outrigger operation. This manually shifts the blocking solenoid valve, shutting off the oil to the aerial system and directing the flow to the outrigger valve bank.

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During aerial operations, if the deadman pedal is ever inadvertently released, return control levers to their neutral position. Failure to do so, prior to re-depressing the deadman pedal, will cause a hydraulic pressure surge resulting in momentary loss of control of the aerial ladder.

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In order to actuate aerial functions, it will be necessary to hold the interlock override switch in the actuated position throughout the use of the control lever. This is designed to make each movement of the aerial deliberate and thought out.

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The control levers for aerial operation act directly on the aerial main control valve. In the event of an electrical failure it will be necessary to activate the blocking solenoid mounted forward of the turntable rear step. A slight push and turn to the left of the control knob will allow hydraulic flow to the aerial valve.

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The EPU is a 12-volt dc electric motor and a ___ gpm at ____-psi pump. The system is capable of all functions in a no-load condition.

1.5 2000

EPU - Function should then be limited to those associated with bedding the aerial and stowing the outriggers to allow truck movement in a situation of impending danger.

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95 - 03 EPU - maximum of ____ minutes continuous operation.

95 - 03 The EPU can be used over a long period of time at a __ duty cycle, which is approximately __ seconds in every __ minutes.

7% 21 5

EPU - Actual operating time is dependent upon batteries; state of charge and hydraulic pressure in control being moved.

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EPU This electric switch is wired to work even with the battery switch off.

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Aerial ladder - "Reverse loading" introduces component stress, resulting in reduced load capacities.

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Capacities are established with no additional equipment at the tip (other than “as delivered” items). The weight of tip equipment (nozzles, pike poles, hoses, axes, ladders, etc.) must be deducted from tip load capacities.

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Fully deployed outriggers meet the following criteria:

1. Both beams are extended to full travel. 2. Jacks extended, as necessary (see apparatus leveling indicator). 3. Jacks must be in contact with a solid, load-bearing surface. 4. Outrigger pads done properly. 5. Manual locking pins inserted properly.

If the angle of the turntable is between 6% and 14%/3.5 degrees and 8.0 degrees, reduce capacities through 360 degrees rotation by one-half (50 percent).

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Apparatus Level Indicator - Green indicates full operating capacity, yellow indicates 50 percent operating capacity (3.5 to 8.0 degrees) and red indicates aerial operation prohibited.

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load capacity of aerial at -2 to 9 degrees

Base - 0 I Mid - 0 O Mid - 0 Fly - 250

load capacity of aerial at 10 to 29 degrees

Base - 250 I Mid - 0 O Mid - 0 Fly - 250

load capacity of aerial at 30 to 39 degrees

Base - 250 I Mid - 250 O Mid - 0 Fly - 250

load capacity of aerial at 40 to 59 degrees

Base - 250 I Mid - 250 O Mid - 250 Fly - 250

load capacity of aerial at 60 to 64 degrees

Base - 500 I Mid - 250 O Mid - 250 Fly - 250

load capacity of aerial at 65 to 75 degrees

Base - 500 I Mid - 500 O Mid - 250 Fly - 250

Aerial tip load with ladderpipe 500 lbs at tip with water tower if above ___ degrees at 94.5 feet. Or below ___ feet in extension at all degrees.

46 degrees 65 feet

Aerial tip load with ladderpipe 250 lbs at tip with water tower if above ___ degrees at 94.5 feet. Or below ___ feet in extension at all degrees.

26 - 46 degrees 85 feet

Aerial tip load with ladderpipe 250 lbs at tip OR water tower if below ___ degrees and past ____ feet

26 degrees 85 feet

Aerial Loading Warning Display - 2003 The Class 1 Aerial Loading Display is designed to warn aerial operators of dangerous loading conditions when the aerial device is operated at low angles of elevation. Live loads (factors that increase this load such as occupants on the ladder, water load, extra equipment, etc.) are instantly taken into account by the system and displayed to the operator.

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Aerial Loading Warning Display - 2003 When the aerial load approaches the maximum load (approximately 80%), ____ bars will be illuminated on the display.

Aerial Loading Warning Display - 2003 When the load is increased to 90% - 100%, __ – __ bars will be displayed and the display will begin to flash.

19 - 20

Aerial Loading Warning Display - 2003 When the maximum load is exceeded by __ – ___ lbs., an alarm on the pedestal will sound. This alarm can be silenced by use of the toggle switch next to the Aerial Loading Display. The alarm will reset when the device comes out of an overload condition.

50 to 100 lbs

06/09 The Rotation Limiting System works in conjunction with the outrigger/aerial interlock system and will not allow the aerial/turntable to be rotated into an area which is not supported by fully deployed outriggers. An override switch permits use of the aerial with a “not fully deployed” outrigger, but the Rotation Limiting System limits the aerial’s movement to the side with the fully deployed outrigger.

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06/09 Rotation Interlock Override (Right & Left) Used to rotate the ladder while utilizing the EPU during an electrical failure. The ladder can be moved __ to __ degrees past the tiller cab toward the short set side and __ degrees past the tractor cab toward the short set side.

8 to 10 2

06/09 The Rotation Limiting System is designed to help the aerial operator by not allowing him to move the aerial into a restricted position due to a short-set outrigger.

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Rotation Limiting System Proper function of the system is as follows: 1. If the truck is short-set, the appropriate Outrigger Not Deployed light will be illuminated in red at the pedestal. To operate any ladder function, the guarded Interlock Override switch must be held continuously while operating ladder controls. 2. In order to allow for cradling of the ladder, there is approximately ___ degrees of rotation travel past the vehicle centerline. This small angle will not allow the ladder to top or become unstable over the other side. 3. With the ladder in the cradle, the ladder is near the rotational limit. Both rotational directions are allowed but swinging toward the short-set side will be cut-out after approximately ___ degrees of rotation. 4. At that point only rotation away from the short-set side is possible.

4 4

For rotational movement, in addition to the Blocking Solenoid, it will be necessary to activate the LEFT or RIGHT Rotation Interlock Override (page 92). Its two buttons are located just forward and to the right of the turntable step. With the blocking solenoid in the OUT or CLOSED position, push either the LEFT or RIGHT Rotation Interlock Button while at the same time moving the main Rotation Control Lever the same LEFT or RIGHT position. Rotating the ladder with the Override Controls bypasses all safety systems and will allow the ladder to move into normally restricted positions. Under no circumstances should the ladder be rotated into the side of the apparatus with a short-set outrigger.

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06/09 The EPU is rated for a maximum of ___ minutes (approx.) continuous operation. Exceeding this period of time will cause the unit to fail.

06/09 The EPU can be used over a long period of time at a ___ duty cycle, which is approximately ___ minutes in every __ minutes (__ minutes on and __ minutes off).

23% 2. 3 min in every 10 min 2. 3 min on and 7.7 min off

2009 only Anchor attachment point rated at _____ lbs. located on left and right side the trailer gooseneck near the fifth wheel.

9000

2009 only The Winch Lifting system utilizes a manually operated winch mounted at the turntable step area along with a Rope Roller assembly mounted at the ladder tip, which when used together, permits loads to be raised with relative ease and safety.

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2009 only The maximum capacity of the winch system is designed to match the ladder’s capacities therefore the load must never exceed the ladder capacity for any given position.

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2009 only The winch is a multi-speed model providing high torque – slow speed (_____) lifting for heavy loads or low torque - higher speed (_______) lifting for lighter loads. Ratcheting of the winch handle is also possible to minimize handle movement.

clockwise counterclockwise

2009 only Wrap rope around the mechanical winch in a clockwise direction when looking down on the unit from the top. An arrow has been cut into the winch mounting plate to clearly identify the proper path of the rope. Wrap the rope 4 to 5 times around the drum starting at the bottom, working it up until it reaches the winch’s upper arm.

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2009 only Capstan Receiver Location where the capstan is attached. The capstan has the same ____ lb. rating as the tip load of the aerial ladder.

250

-2 to 9 degrees - __________ 10 to 29 degrees - _________ 30 to 39 degrees - _________ 40 to 59 degrees - _________ 60 to 64 degrees - __________ 65 to 75 degrees - __________

-2 to 9 degrees - 0 , 0 , 0 , 250 10 to 29 degrees - 250 , 0 , 0 , 250 30 to 39 degrees - 250 , 250 , 0 , 250 40 to 59 degrees - 250 , 250 , 250 , 250 60 to 64 degrees - 500 , 250 , 250 , 250 65 to 75 degrees - 500 , 500 , 250 , 250

QS-100 Aerial Ladder Flashcards

(103 cards)