MSHA - Interactive Training - JTA Spiders -Table of Contents

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	Mobile Tire Boom Truck - Tire Changer
	Contact: Palmer.Melvin@dol.gov

1. Start of Day

Be ready to work

Have proper attire

Check with service manager

Ask about pending jobs

Review if additional work is needed at previously assigned sites

Ask about new jobs

Get location of jobs

Get directions to job site

Obtain work/service order

Obtain supplies needed

Load onto truck

Secure tire - chain and binder or ratchet strap

Ensure load is evenly distributed

2. Pre-op Service Truck Inspection

Check service truck for supplies

Refer to supply checklist

Repair materials

Properly marked closed containers

Check equipment and tools

Check bead breaker and rams

Check air/hydraulic pumps and jacks

Hardwood - all assorted sizes

Check wheel chocks

Check hand tools

Check pneumatic tools

Check impact wrenches

Check impact sockets

Grinder has to be laid upside down until wheel stops spinning

Check tire irons

Check chains, slings, and binders

Examine service truck

Conduct DOT pre-trip inspection

See service truck inspection report

Check fluid levels

Accessories hydraulic fluid

See crane manual

Check cylinders

Check fastenings

Welds, gussets, base plate bolts, pins. Always replace parts with OEM parts, Grade 8 or better

Follow and obey all customer/site rules

Get site specific training

Poor customer relations

Personal injury

Loss of production for both sides

Get directions to location of equipment to be serviced

Put on proper personal protection equipment

Discuss putting on PPE prior to leaving service truck

Some companies may require additional PPE

Travel to equipment requiring service

Establish communication with machine operator if applicable

Make sure to establish communication with the machine operator before approaching equipment

Park service truck

Chock or turn wheels to berm

Engage flashers or warning lights

Ensure equipment is lock-out/ tag-out

Safety cone on seat

Always use 3-point contact when entering/exiting service truck or equipment

Chock equipment to be serviced

Walk around equipment to be serviced and observe area

Electric overhead wires

Underground piping

Personnel movement

Determine if replacement tire is correct size and application

Failure to determine early enough could be wasting time and productivity

Determine if equipment can be serviced at this location

If there is any safety issues, ask company to move the equipment. Do not position yourself between the highwall and equipment to be serviced.

Determine if you are familiar on this type of particular equipment or wheel assembly. If you are not, STOP

Do Not Proceed Any Further! Contact Your Supervisor

Position your service truck

Position boom parallel to tire to be service

Keep service truck as far away as practical

More distance is better

Park service truck

Engage PTO and set fast idle switch

Engage flashers or warning lights

Chock or turn wheels to berms

See Operator's Crane Safety Manual

Place safety cones around work area

4. Jacking/Cribbing

Articulating equipment must be pinned or locked in place

Could also shift while trying to remove the tire

Remove cribbing from service truck and place near jacking point

Use proper lifting techniques

Wear gloves when handling cribbing

Jack or support only at manufacturer's specified locations

This information has to be obtain from site personnel

Begin building two cribs

One for support

A crib means to stagger direction of blocking material for strength and stability

Build jacking crib to within height of jack

Cribbing procedure may change depending on design of equipment being serviced. If jack starts to tilt you need to reposition cribbing

Build support crib as high as possible to support point of the equipment to be serviced

Raise jack enough to insert final support crib

Must be high enough to remove old tire - take in consideration the tread depth on new tire

Lower jack until equipment rests on support crib

Leave jack in place but equipment must rest on support crib

Visually inspect the crib after the equipment is lowered for stability

Gently nudge the equipment with your boom arm and observe cribbing from movement

This is a point of no return. Once you start to change the tire, if the cribbing becomes unstable, you are in big trouble

Remove the valve core to deflate tire

Never try to service an inflated tire. For maximum productivity while tire is deflating take this opportunity to set up necessary tools for the job.

5. Dismount tire

Run a wire through the valve to be sure tire is completely deflated

Remove necessary tools from service truck

Tools vary with types of assembly

Refer to TIA Service Manual for proper tools

Break front bead far enough to remove the lock ring and the O-ring

Remove lock ring and O-ring

Insert bead breaker tool into bead breaker notch in bead seat band and set adjustment screw

Use bead breaker tool to remove bead seat band from front bead

When using bead breaker tool, operator must stay out of trajectory of tool

Remove bead seat band and front flange ring from wheel assembly

Lay the wheel components on the ground on top of cribbing materials on one end for cleaning

Lay on cribbing to prevent injury from falling or rolling

This prevents additional dirt on components

Move bead breaker to back of rim

Break back bead

When using bead breaker tool, operator must stay out of trajectory of tool. Be aware of brake lines, hydraulic lines on the equipment being serviced.

Place sling on boom

Examine sling for defects

Move boom and sling over center of tire

Adjust sling snugly around tire

Caution: You may not always be able to use a sling on all equipment

Lift the weight of the tire off the rim while retracting the boom to remove tire from wheel

This must be done gradually to avoid equipment shift and tire snagging and moving suddenly

Be sure rear flange ring is not stuck to tire before removing tire completely from wheel

Whenever handling tire with boom never position yourself between the tire and the equipment being serviced and the service truck

Crane trucks have more than one set of controls to allow you to operator crane from a safe position

Keep tire as close to the ground as possible when moving tire with boom

Set tire safely to side

If tire must remain standing, lean, block and chock securely to prevent movement

Lay down tire if possible

Clean and inspect rim base for cracking, deterioration and distortion

Remove all rust, corrosion, dirt or debris from wheel and all components

Pay close attention to lock ring and O-ring gutter

O-ring must seat properly for the tire to retain air

Look at wheel components identification stamping to make sure they match

If there is a question on component matching, contact your supervisor

Replace complete valve assembly

Leaking valves can cause loss of productivity and redo and customer dissatisfaction

Replace any damage, bent, severely rusted or corroded component

Remove new tire from service truck utilizing boom and bead hook

Lean tire against service truck and chock securely in place

Remove bead hook

Install tire sling around tire snugly

Caution: You may not always be able to use a sling on all equipment

Inspect replacement tire for damage

Examine the inside of tire for water, debris, and any foreign material

Inspect and lubricate tire beads with an approved tire lubricant

Lubricate wheel with an approved lubricant

Align inside flange ring with lock where applicable

Move boom and sling overtop of replacement tire

Adjust sling snugly around tire

Caution: You may not always be able to use a sling on all equipment

Using boom move tire to wheel

Center tire and proceed to boom out and push tire on rim

Hold tire in place with boom

Install flange ring

Lubricate bead seat band and install

Lubricate and install new O-ring

Install proper size and thickness O-ring

Install lock ring

Warning: Never reuse a sprung or bent lock ring. Replace it!

Visually inspect components for proper alignment and debris free

Place boom snugly against the machine but not so tight as to push the equipment off the block or to prevent proper seating

Never stand in trajectory while inflating tire

Use boom as a restraining device in case lock ring flies off during inflation

Remove valve core and begin inflating tire with remote control inflation device

Never stand in trajectory while inflating tire

Observe proper seating of lock ring assembly during initial inflation

If the bead or rings are not seating or locking properly, deflate the tire before making any adjustment

Install valve core after beads and rings are seated

Inflate tire to recommended pressure

Don't guess, use a calibrated gauge, check with the company maintenance department or look-up in manual

Replace and tighten securely the valve cap

Swing boom back over bed of service truck

Jack up the equipment slightly and start removing cribbing

Lower equipment in reverse manner from raising equipment

7. End of Job Activities

Repack cribbing onto service truck and secure

Clean all tools and return all tools and materials to proper place on service truck

Load and secure old tire to bed of service truck

DOT regulations require all loads be secured. Personal fine and possibly prison

Return boom to stow position and tie down if necessary

Clean debris from service truck bed if necessary

Retract the outriggers

Disengage the PTO and shut down fast idle switch

Remove chock from customer's equipment

Remove lock-out/tag out, cone on seat

Complete paperwork

Make of machine

Check tread depth

Customer signature

Return keys to equipment

Notify customer equipment is ready to be returned to service

Make one last walk around to make sure all tools are picked up and cabinets are closed securely and your cones are properly stowed and work area has been cleaned

Always leave the work area as clean or cleaner than it was when you arrived

8. End of Day Activities

Remove old tire from bed of truck

Use same procedure as you would at the job site

Mark tire with customer's name and disposition

Complete paperwork and hand in

Report any maintenance issues or problems with your service truck

Replenish service supplies if time permits

Title

Mobile Tire Boom Truck - Tire Changer

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Company

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Version

39

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