ESTIMAR EL RECURS DE REPOSICIÓ REFERENT A L’EXPEDIENT D’APLICACIÓ DE CONTRIBUCIONS ESPECIALS PER A L’EXECUCIÓ DE

These instructions provide the recommended procedures for protecting equipment from damage during both short term and long-term storage periods. Also included are instructions for placing this equipment into service after having been stored. For the purposes of this instruction, a short term storage period is considered to be less than three months; a long-term storage period is considered to be three months or longer.

General Electric recommends a maximum storage period of three years, with these storage procedures being repeated after each year. After a storage period of three years or more, the motorized wheels should be removed and sent to an overhaul facility for teardown and inspection of seals and bearings. These should be replaced if necessary.

Periodic (every three months) inspections should be made to determine the lasting qualities of long-term storage protection measures. Such inspections will indicate the need for renewing protective measures when necessary to prevent equipment deterioration. Proper storage of this equipment is vital to equipment life. Bearings, gears, and insulation may deteriorate unless adequate protective measures are taken to protect against the elements. For example, bearings and gears in the motorized wheel gear case are susceptible to the formation of rust, insulation in rotating electrical equipment can accumulate moisture, and bearings may become pitted.

Never apply any spray, coating, or other protective materials to areas not specifically recommended.

It is also important to note that these instructions cannot possibly anticipate every type of storage condition and, therefore, cannot prevent all equipment deterioration problems caused by inadequate storage. These instructions are not intended to be all inclusive, but are minimum guidelines for achieving the best possible equipment life and the lowest operating cost when the equipment is returned to service.

NOTE: Local conditions and/or experience may require additional procedures and/or additional storage precautions.

Storing A Truck That Is Operational

When a fully operational truck is being placed into storage for less than three months, the best protective measure which can be taken is to drive the truck once a week for at least 30 minutes. Prior to driving the truck, the rotating equipment should be Meggered and:

• If greater than 2 megohms, run normally.

• If less than 2 megohms, isolate the condition and correct it before running.

Driving the truck circulates oil in the gearcase to keep gears and bearings lubricated and free from rust. It also prevents deterioration of the brushes, commutators and slip rings.

When a fully operational truck is being placed into storage for three months or longer, and the truck cannot be operated weekly throughout the storage period as indicated above, perform the following:

1. Drain the oil from the gearcase and install rust preventive 4161 (a product of Van Straaten Chemical Co.) or equivalent. Fill per General Electric Motorized Wheel Service Manual.

A07003 11/05 Storage Procedures and Idle Machine Preparation A7-13 2. Megger the wheels as indicated in the

instructions above. Operate the truck for at least 30 minutes to ensure that the rust preventive compound has been thoroughly circulated throughout the gearcase. Stop the truck and drain the rust preventive compound.

NOTE: Do not run a loaded truck with rust preventive compound in the wheel motor gearcases.

Do not operate trucks without oil in the wheel motor gearcases.

3. Perform a megohmmeter test. Refer to the truck's Vehicle Test instructions for the correct procedure. Record the Megger readings for future reference. They will be helpful in determining if deterioration is being experienced when additional Megger tests are made as part of the periodic inspection.

4. Lift all brushes in the motorized wheels, blowers and the alternator. They must be removed from the brushholder. Disconnecting brush pigtails is not required.

5. Cover any open ductwork with screening material to prevent rodents from entering. Then tape over the screen to prevent the entry of water and dirt (allow breathing).

6. Examine all exposed machined surfaces for rust or dirt accumulation. Remove all contamination as necessary. Remove rust by using a fine abrasive paper. Old flushing compound can be removed with mineral spirits (GE-D5B8). Methanol should be used to remove all residue. When clean, coat with Tarp B rust preventive. Refer to General Electric Motorized Wheel Service Manual for specifications.

7. Loosen exciter drive belts (where applicable). 8. Open all switches in the control compartment.

9. Install a 500 watt heat source inside all control groups which house electronic control equipment. These heat sources are to be energized below 0° C (32° F) and de-energized above 5° C (41° F).

10. Install a 500 watt heat source inside the commutator chamber of both motorized wheels and inside the alternator slip ring chamber. This will minimize the accumulation of moisture. A hole in the bottom of the hubcap will accommodate the electrical cord for the heat source in the motorized wheels. These heat sources are to be energized continuously. 11. Seal the compartment doors with a

weatherproof tape to prevent entry of rain, snow and dirt (allow breathing).

Storing A Truck That Is Not Operational

When a truck which is not fully operational is being stored for any period of time, perform the following:

1. Drain the oil from the gearcase and install rust preventive compound 4161 (or equivalent). Fill per General Electric Motorized Wheel Service Manual.

2. Jack up each side of the truck (one side at a time) enough to rotate the tires.

3. Connect a D-C welder as described in the Vehicle Test Instructions (Wheel Motor inst. 400A, arm & field in stress 900- 1000 rpm arm). 4. Rotate each motorized wheel (one at a time) for at least 30 minutes to ensure that the rust preventive compound has been thoroughly circulated throughout the gearcase. Disconnect the welder. Remove the jacks. Drain the gearcase.

5. If the truck is partially dismantled, pay close attention to ductwork, blower shrouds, etc., which may be exposed to weather conditions. These areas will require the same sealing measures as in Step 5 above which deals with protecting ductwork. Cover exposed blower housings to prevent entry of water and dirt. 6. Perform Steps 3 through 11 in “Storing A Truck

That Is Operational” in this section.

Storing A Major Component

When storing a motorized wheel, alternator, blower or control group for any period of time, always store it inside a warm, climate-controlled environment. Do not attempt to store individual components where they would be exposed to inclement weather, climatic changes, high humidity and/or temperature extremes.

Periodic Inspections

It is important that periodic inspections (every three months) of stored equipment be performed to ensure the continued serviceability of all protective measures initially taken when the storage period began. The following items should be checked at each inspection interval:

1. Remove the weatherproof tape from the compartment doors and perform a Megger test as described in the Vehicle Test Instructions. Record the test results and compare them with the recorded Megger readings taken when storage first began, and those taken throughout the storage period. Remove all test equipment and close the compartment. Reseal the compartment doors with new weatherproof tape. If Megger readings indicate a deterioration of insulation quality (to below 2.0 megohms), more protection may need to be provided.

2. Check all other weatherproofing tape. Replace any that has become loose or is missing. 3. Check all heat sources. Replace or repair any

that have become inoperative.

4. Check all machine surfaces that were coated with flushing compound when storage began. If the compound appears to be deteriorating, it must be cleaned off and renewed.

Placing Equipment Into Service After Storage

If a truck has been operated weekly throughout the storage period, perform a complete visual inspection of the motorized wheels, blowers, alternator and control compartments. Repair any defects that are found, then place the truck directly into service. If the truck was not operated weekly throughout the storage period, perform the following procedures:

1. Remove all weatherproofing tape from control compartment doors and ductworks.

2. Remove all screening material from the ductwork.

3. Remove all heat sources from the motorized wheels, control compartments and the alternator.

4. Fill with recommended oil. Refer to the Motorized Wheel Service Manual for the type and amount oil to be used. This oil should be drained and new oil should be added after 500 hours of operation.

5. Clean all motorized wheel grease fittings in the axle box. Ensure that all grease lines are completely full of grease, then add the recommended amount of grease to all fittings. 6. Install brushes in the motorized wheels, blowers

and alternator. Make sure that the brushes move freely in their carbonways and that they have enough length to serve until the truck's next inspection period. Install new brushes if necessary. Ensure that all brush pigtail screws are tight.

A07003 11/05 Storage Procedures and Idle Machine Preparation A7-15 7. Perform a megohmmeter test. Refer to the

truck's Vehicle Test Instructions for the correct procedure. If Megger readings are less than 2.0 megohms, the problem could be an accumulation of moisture in the motor or alternator. If this is the case, the faulty component will have to be isolated and dried out using procedures outlined in the G.E. Service Manual.

8. Perform a thorough inspection of the motorized wheels, alternator, blowers and control compartments. Look for:

•Rust or dirt accumulation on machine surfaces

•Damaged insulation

•Any accumulation of moisture or debris, especially in the ductwork

•Loose wiring and cables

•Any rust on electrical connectors in the control compartment

•Any loose cards in the card panels 9. Clean and make repairs as necessary.

10. Check the retarding grids and insulators for loose connections and dirt accumulation. Clean and tighten connections as necessary.

11. Where applicable, check exciter drive belts for cracks and deterioration. If acceptable, set the belt tension to specification.

12. Before starting the engine, turn on the control power. Check that the contactors and relays pick up and drop out normally.

13. Perform a startup procedure on the complete system to ensure maximum performance during service. Refer to the truck's Vehicle Test Instructions for the complete test procedure.

After all storage protection has been removed, the truck has been cleaned and inspected, all repairs have been made, the motorized wheel gearcase has been filled with new oil, the dirt seals have been completely purged with new grease, and the system has been completely checked, the truck can be placed into service. However, it is recommended that the truck be driven unloaded at a low speed of no more than 16 km/h (10 mph) for the first hour of operation.

B01016 Index B1-1

SECTION B

STRUCTURES

INDEX

STRUCTURAL COMPONENTS . . . B2-1 DUMP BODY. . . B3-1 FUEL TANK . . . B4-1

B02028 Structural Components B2-1

SECTION B2

STRUCTURAL COMPONENTS

In document ACTA DE LA SESSIÓ ORDINÀRIA NÚM. 7 DEL PLE DE LA CORPORACIÓ. Alcalde-president. Il.lm. Sr. Josep Camprubí i Duocastella. (página 62-68)