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83 Cards in this Set
- Front
- Back
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The Maintenance Platform hydraulic accumulators are charged with
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1,200 PSI of nitrogen
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Platform sensor tape switches are activated only when the ______________________ from the platform.
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Control console is plugged into and operated
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. __________ must be bled to remove air from cylinder top. Failure to bleed ________ may result in loss of ability to control platform position.
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Lift cylinders
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Do not tow when ____________________ as damage to steering arms may result.
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Strobe warning light and power is on
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Do not permit the ______________ to quickly spring back to the center. This could result in a sudden application of the drive break.
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DRIVE lever
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Mode selector switch must be paused on the _________ to allow engine to _____ before selecting the drive mode. Failure to do so could result in personnel injury and damage to equipment.
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Center position… idle
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Do not use ladders or _____________________. Do not climb down the scissors from an _______ position.
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Ladders or scaffolding… elevated
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The down alarm will not sound when either the ____________________________ valves are used.
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EMERGENCY MANUAL LOWERING valve or the EMERGENCY LOWERING
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When using the _________________________ valve, the descent will not stop immediately upon turning the valve to the OFF position but will drift slightly before stopping.
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EMERGENCY MANUAL LOWERING
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When lifting with a davit, do not exceed maximum load capacity of ____________ on davit boom
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250 lb or 500 lb
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. A ________________ should be ready for use in the event of loss of control during winching or towing
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wheel brake system
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Do not stand within the scissor frame when installing or removing the ___________ __________. Scissors frames could inadvertently lower, causing injury to personnel.
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CYLINDER SAFETY STOPS
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When performing any service which requires the platform to be raised, use the __________________.
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CYLINDER SAFETY STOPS
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Disconnect the ground connection at the _________ when testing continuity replacing electrical components.
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Batteries
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The ___________ used in the diesel cold start is extremely flammable and toxic. It is harmful or fatal if swallowed. Do not induce vomiting. If the ethyl ether enters eyes, clean with water for __________.
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Ethyl ether... 15 minutes
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Loosen only ______ cylinder check valve(s) at a time
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One
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. Turn _________________________________ to the OFF position to ensure that the equipment is fully inoperable and cannot be accidentally activated while maintenance is being performed.
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EMERGENCY BATTERY DISCONNECT
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. Bleed platform ___________ before removing the __________________________. Accumulator contains high pressure hydraulic fluid (2200 PSI)
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Lower accumulator… Platform Extension Valve
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______ may be present on and around battery posts.
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Acid
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. ____________ and _____________when unpacking to prevent the maintenance platform from rolling
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Block the wheels… Engage handbrakes
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. Do not operate the ________ switch for more than __________ between successive starting attempts or overheating and damage to starter may result.
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START… 30 seconds
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. Do not use the alternative cold start procedure more than ________ times in succession or damage to engine may result.
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Three
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When working from a raised platform, the platform should be positioned approximately ________ above or below any surface to prevent damage from unexpected movement
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12 inches
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. Do not exceed the rated load of ______ overall, or _____ per rolling panel, not to exceed _______ in rolling panel area.
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2,000 lbs… 250 lbs… 1,250 lbs
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. Before towing, the ____________, ____________, ____________, and ________________ or damage to equipment may occur
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- Battery DISCONNECT switch must be in the OFF position
- Driveline disconnect disengaged - Handbrakes off - Strobe light not flashing |
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Do not _____ cylinder rod surface
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Scratch
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The external pressure source must have an operating pressure of _______________. It shall have a maximum relief pressure setting of ___________.
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1500 to 2000 PSI… 2400 PSI
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An empty cold start cylinder weighs _____.
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10 oz
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__________ are highly pressurized and should be handled with care. The hydraulic system they are connected to must be _____________ before opening any part of the system.
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Accumulators… relieved of pressure
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A black, sooty exhaust means that the engine is ________ or that the injector equipment is _________.
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Overloaded… faulty
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The driving speed may be increased by moving the ____________ further from the center position. The maintenance platform may be driven when elevated. The speed is limited when driving with the platform raised.
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DRIVE lever
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Steering will not return by itself. The ______________ must be used to straighten the wheels after a turn.
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Opposite steer function
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The _____________ at the front of the platform deck will stop forward drive when they meet an obstruction only when control console is connected to the ____________
___________. Reverse drive and platform retraction will then be the only function operable. |
Tape switch sensors… upper station relay box
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The __________ will function without the engine running.
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DOWN switch
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When unit is operated from the platform, ________________ will stop platform from lowering and forward extension when they meet an obstruction. Platform lift and platform retraction will be the only functions operable.
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Tape switch sensors
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The outriggers cannot be retracted until the platform is _____________.
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Fully lowered
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Readying for and securing from towing may require ____ person(s).
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Two
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If the pressure needs to be increased, start the engine and move the ____________________ to the _______________ until the minimum required pressure level is reached.
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EXTENDA-DECK switch… RETRACT position
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If some difficulty is found in releasing the driveline disconnect, first ____________
_____ and then rock the maintenance platform back and forth to disengage. |
Release the wheel brakes
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The maximum towing speed is ______
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15 mph
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Hydraulic pressure is required for the wheel brakes to engage. The pressure available is indicated by the _____________________________________.
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BRAKE ACCUMULATOR PRESSURE gauge
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___________ is necessary in order to develop full break power. Less pressure will reduce holding power and the number of times the brakes can be applied.
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1500 PSI
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The brake accumulator pressure may be built up by holding the EXTENDA-DECK switch in the _________ position while the engine is running.
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RETRACT
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The ____________________________________ gauge indicates the pressure in the platform lowering accumulator system.
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LOWERING ACCUMULATOR PRESSURE
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Externally ______ the platform while working on the electrical and hydraulic systems
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Ground
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Do not use within ________ of electrical power-lines
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10 feet
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DO NOT OPERATE without ______________, _________________, and _____________
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- Gates close and latched
- Guardrail pinned in place - Safety lanyards in place |
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Safety lanyards are worn when _____________, ________________, or _______________
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- Rolling panels are open
- Guardrails are lowered - Any time platform is raised above 10 feet |
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The platform cannot be elevated above ________ until limit switches indicate that the outriggers are at full extension.
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8 inches
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An EMERGENCY switch on the control console will stop all maintenance platform functions except ______________, ______________, and _____________
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Engine operation, platform lowering, and platform retraction.
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The EMERENCY SWITCH must be _________ to start the engine.
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Turned OFF
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The OUTER location of the davit has a ______ capacity.
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250 lbs
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The INNER location of the davit has a _______ capacity
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500 lbs
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________ is automatic when the MODE SELECTOR switch on the console is moved from the ________ position
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Braking… DRIVE
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Tape switches at the front of the platform stops______________ , _____________, and __________________ when unit is deflected by an obstruction.
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forward drive, platform extension, platform lowering
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The platform cannot be elevated unless all of the outriggers are ______________ and limit switches are ________
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fully extended… tripped
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An operator controlled emergency switch stops all machine functions except _____________, _______________, and ________________
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platform lowering, platform retractions, engine operation
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An ______________________ may be activated at the ground level in the event of primary braking failure
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Auxiliary wheel braking system
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_____________________________ are available to prevent rolling when hydraulic power is not available
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Manually applied hand brakes
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Moving the EMERGENCY switch to the ___________ will prevent all control console functions except ______________________.
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OFF position… platform lowering and engine operation
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The emergency switch must be in the ____________ to start the engine
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OFF position
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There are four ways to stop:
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1) Emergency switch
2) Hydraulic brakes (e-brake) 3) Mode selector switch 4) Chocks |
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Cold start will only operate at temperatures less than _____________
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20 degrees Fahrenheit
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The MANUAL LOWERING valve permits platform lowering from the _____ position.
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Ground
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A minimum pressure level of _________ is required for the brakes to develop adequate and repeated holding power
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1500 psi
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The EMERGENCY BATTERY DISCONNECT switch disconnects battery power from all functions except ___________.
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emergency retract
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Bleed the _____________ before checking the hydraulic fluid level
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Accumulators
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The hydraulic fluid level should be in the _____________ of the sight glass when the platform is fully lowered
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Upper two-thirds
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The fuel tank should be at least ________
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Half-full
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Make sure the engine lubrication oil is between the __________________ markings
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Minimum and maximum
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Make sure the tow-bar is stored on its ___________ and the driveline disconnected is in the __________ position during visual inspection
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Carrying hooks… engaged
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Do not operate the START switch for more than ____________ between successive starting attempts or overheating and damage to starter may result
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30 seconds
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When the engine has started, move the EMERGENCY switch to the ____________ in order to operate
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ON position
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An ether injecting system is provided to ease startup when the ambient temperature is below ______________.
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20 degrees Fahrenheit
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To drive, make sure that:
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a) EMERGENCY switch is in the on position
b) Driveline disconnect is engaged c) Both handbrakes released |
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Mode selector switch must be paused on the center position to allow engine to idle _______________ before selecting drive mode.
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3 to 5 seconds
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The maximum wind speed allowed for UMS operation is ________
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45 mph
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In order to be qualified to train on the UMS, you must be _______________
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At least a 5-level
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The maximum height of UMS extension is _________
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36 feet
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In order to be on the platform of the UMS in an extended position, __________, ___
____________, and _______________ are required. |
A hardhat, 10 foot harness, ear defenders and foamies
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_________ must be worn when working in the vicinity of a unit equipped with PLHEB (Platform Level Hydraulic Emergency Brake).
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Eye Protection
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UMS can be horizontally extended ___ feet
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8 ft.
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What’s the max and min speed of the UMS when lowered and extended respectively?
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3mph and .3mph
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