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Hoistman (Spider No. 1)
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1. 1. Start-of-Shift Activities
Sign in at mailbox
Proceed to dry house to change clothes
Check in at lamp house or dry house
Obtain PPE
hard hat with hearing muffs and/or ear plus
safety glasses
metatarsal boots
leg bands
metacarpal gloves
florescent and reflective vest
rain suits (when needed)
Conduct visual inspection of unit house
check housekeeping
check for slip/trip/fall hazards
check for general cleanliness
remove garbage/trash/debris if necessary
check for cleanliness around cooling fan
nothing should be stored on top of cooling fan radiator
check oil tank
check for absorbent pads on top of tank used to catch oil spills/overflows
replace absorbent pads (if necessary)
check for oil leaks in lines, fittings, or tank
Review MSDS
clean up spills with absorbent pads
check oil temp
Check temperature gauge along side of site glass
Never operate hoist if temp is under 100 degrees
Normal temp is between 100 - 150 degrees
Never operate hoist if temp is over 180 degrees
high warning light should come on @ 180 degrees
Continue to let hoist idle if high temp is observed until temp returns to normal (as long as oil is at correct level)
check oil level (site glass)
should be near low level when unit is cold
should be near high level when unit is warm
add oil to unit tank as needed
clean area around cap on top of tank
remove cap
use only clean container to add oil (ISO 46)
Refer to MSDS for ISO 46
fill to just under half on gauge
replace cap
clean up any spills
check pump coupler (MCH200 Hoist only)
look at marks to ensure coupler hasn't moved from side to side
Report any problems to mechanic or superintendent
Check hoist house phone
check battery posts for tightness
check phone by blowing into receiver and push button - listen for sound
check terminal posts for wire connections
Meet with other hoist operators
Discuss condition of hoist
Discuss work phase
Discuss location of backhoe
Discuss bottom marks on cable
Discuss locations of steady marks
Discuss boom centers
Discuss settings of limit switches (upper and lower)
Discuss slow down switch setting (lower)
2. 2. Hoist Pre-op
Check hoist book for any documented problems/hoist condition
Conduct inside walk-a-round
Check for oil leaks/spills
Check tightness of turn buckles
Check arms on disc brake for cracks/loose bolts/loose pins
check hoist, boom, drum and load cables
check that cables are wrapping correctly on the drum
Conduct outside walk-a-round
Check bolts for tightness on both legs and on top of pedestal
Check pins on mast and boom and ensure cotter keys are in place
Ensure cables are on sheaves
Ensure neoprene (plastic) block is in position under foot sheave
Ensure cable rollers are in place and cable is centered on the rollers
Ensure wooden block is under boom cable on the derrick pipes
Check derrick pipes for cracks or movement
Ensure a tight fit between foot block and hoist
Check swinger chain for too much slack in chain, loose bolts or oil around motor
Ensure swinger chain plate is tight
Check swinger hoses going back into the hoist house for leaks, loose fittings and ensure they are secured to the derrick pipe
Return to hoist house
Operating Examination
Sit in operators seat
Place hand on E-stop prior to starting hoist
This allows for quick shut off in case of hoist malfunction during startup
Press start button
Observe pressure gauge
Gauge should rise slowly to approximately 1,000 lbs and settle to approximately 500 lbs
Release load cable
Instruct topman to remove hook from leg
Swing boom to center
Check drum and motor brakes
Turn load line brake switch to drive brake test and hold
Move the load line control to the lower position to ensure the load line drive brake is holding
This is indicated by an increase in pressure (up to 3,000 lbs)
Do not release switch until pressure comes back down (approximately 500 lbs)
Hoist should not move
Do not overpower
Release load line brake switch
Turn load line brake switch to caliper brake test and hold
Move the load line control to the lower position to ensure the load line caliper brake is holding
This is indicated by an increase in pressure (up to 3,000 lbs)
Do not release switch until pressure comes back down (approximately 500 lbs)
Hoist should not move
Do not overpower
Repeat this process for boom line drum
Manually check slow down limit switch (top)
move arm on slow down limit switch to the right (counter-clockwise)
pull back on load controller
hoist will run at slow speed
Manually check the upper limit switch
move arm on upper limit switch to the right (counter-clockwise)
pull back on load controller
hoist should not move
over-travel light should come on
Visually inspect dial indicator chain
check light
ensure chain is in place
Visually check dial indicator coupler pin
ensure set screw is secure and pin is engaged into the shaft
Check over-speed indicator
open door on dial indicator
manually raise the weights on the governor
check to see that over-speed indicator console light comes on
Only applies when in personnel mode on MCH200 Model
Check anti-piling limit switch
pull piling bar either way and check to ensure anti-piling consol light comes on
hoist should not move with controller
Reset the anti-piling limit switch by shutting hoist off and restarting
Check boom limit switch
Swing boom to left or right so that breast sheave is visible
Raise the boom slowly and note where boom stops
Ensure boom stops before reaching breast sheave
Swing boom over to the crows nest for topman to check hook makeup
Lower cable for topman to check hook makeup
Check hook for cracks
Check self-closing hook handle for smooth operation
Check hook handle extension for tightness
Check crosby clamps for tightness
Check swivel
Check swivel pin
Ensure cotter key is in place
Check for cracks
Ensure it spins freely
Check width of gap in swivel
normally 1/8 inch; wider gap indicates wear
Check thimble
Check for loose bolts
Check for cracks
Remove hoist from service if defects are observed on hook makeup
Record pre-op examination in hoist book (record any defects, sign and date)
3. 3. Cable Examination
Place boom over crows nest
Allow topman to place chalk mark on cable directly in front of hoist
Instruct topman to go to crows nest with a piece of burlap and wrap lightly around cable
Lower cable into hole while topman holds burlap around cable and checks for burs, broken wires, deformities
Lower hoist until mark on cable reaches the topman
Topman removes the mark when mark reaches him
Swing boom to center
Have another person position himself in front of hoist house
lower cable into the hole while this person rags remaining cable with burlap
lower cable to approximately 20 feet from bottom
Discuss any defects found with foreman
Refer to Subpart O for guidance on out of service criteria
raise cable back out of hole
attach shaft bucket and make a trial run in the hole
run bucket to steady mark
check lower slow down and lower limit
slow down usually set to 3 to 4 wraps above lower limit
should stop approximately 40 feet from the bottom
pull the bucket back out of the hole
should be into hitting the slow down switch when you begin to see the makeup at the top of the hole
Conduct every 7 days (Usually Sunday day shift) and if hoist has been down for a full operating shift
Record cable examination in hoist book (date and time ragged) and initialed by hoist operator
About
Title
Hoistman (Spider No. 1)
Subject
-
Company
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Author
Debbie Combs
Version
118
Comments
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