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Machine Mechanic

Location:
Accra, Greater Accra Region, Ghana
Posted:
February 21, 2020

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Resume:

RESUME OF BENJAMIN SIAW

PERSONAL DETAILS

Name: Benjamin Siaw

Date of Birth: 25

TH

DECEMBER 1979

Residential Address: H/NO J338/6, Nungua Buade, Accra Postal Address: GAB Production Limited P O Box 1011, Korle-Bu, Accra Marital Status: Married

Tel: +233-*********

Email: adbwft@r.postjobfree.com

Profession: Heavy Duty Diesel Mechanic

PROFILE

I am a BSc Automotive Technology (Automotive Option) graduate with working experiences from Silver Star Auto Ltd., Prestige Motors Ltd, Ghana Oil Palm Development Co. Ltd, Mantrac Ghana Ltd and currently am working as a Heavy Mining Equipment Mechanic with Goldfields Ghana Ltd, Tarkwa mines. EDUCATION

Institution: University of Education and Technology Winneba (Kumasi Campus) Country: Ghana

Year: 2012-2016

Certificate: BSC. Automotive Technology Option

Institution: Kumasi Polytechnic

Country: Ghana

Year: 2008 – 2009

Certificate: Motor Vehicle Technician (Part III)

Institution: Sunyani polytechnic

Country: Ghana

Year: 2001 - 2002

Certificate: Motor Vehicle Technician (Part II)

Institution: Ghana National Academy

Country: Ghana

Year 2000 - 2001

Certificate: Motor Vehicle Technician (Part)

Institution: Sunyani Polytechnic

Country: Ghana

Year: 1996 - 1999

Certificate: Motor Vehicle Mechanics Work

Institution: Mim Presby Junior High School

Year: September 1992 – August 1995

Certificate: Basic Education Certificate Examination (BECE) WORK EXPERIENCE

Company: Goldfields Ghana Limited

Job Title: Heavy Duty Diesel Mechanic

Years: October 2010 - Date

Responsibilities:

WORKSHOP MAINTAINCE AND REPAIRS

Types of Maintenance and Repairs I did in the workshop STEERING LINK- REMOVAL AND INSTALL

REMOVER PROCEDURE

NOTE: Cleaning is an important factor- Before the removal procedure the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal components Note: Put identification marks on all hose assemblies and on all tube assemblies for installation purposes. Play all hose assemblies and all tube assemblies. This helps to prevent contaminants from entering the system.

1. Disconnect lubrication hoses from plug at each end of the steering link. 2. Use screwdriver in order to remove retaining ring and plug at each end of the steering link. 3. Install tooling in order to hold the locknut is being loosened. Note: do not remove the lock nut completely from the ball stud until the ball stud has been broken loose from the taper.

4. Use tooling in order to loosen the locknut. Loosen the locknut until the locknut is even with the bottom of the ball stud.

5. Position tooling inbetween the steering link and the steering arm. 6. Strike tooling with a hammer.

7. Repeat in order to loosen ball stud at the opposite end of the steering link. 8. Position tooling in order to support the weight of steering link. 9. Remove locknut from each ball stud.

10. Remove steering link.

INSTALLATION PROCEDURE

Cleanliness is an important factor. Before the installation procedure, all parts should be thoroughly cleansed in cleaning fluid. Allow the parts to air dry.

Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble.

NOTE: Inspect all parts. If any parts are worn or damage. Use new parts. 1. Apply tooling to the threads and on the taper of ball stud. 2. Support the, the weight of steering link with tooling. 3. Install steering link.

4. Install locknut on ball stud.

5. Install tolling in order to hold the ball stud while the lock nut is being tightened. 6. Use tooling in order to install locknut tighten the locknut to it torque specification. 7. Install plug and retaining on the ball stud by using the soft hammer in order to seat the retaining ring. 8. Connect the lubrication hoses to the plug.

TROUBLESHOOTING ON EXCESSIVE BLACK SMOKE

LOOK FOR THE PROBABLE CAUSES

1. Air shutoff (IF APPLICABLE)

2. Air inlet and exhaust system

3. Fuel injector

4. Turbocharger.

5. Atmospheric pressure sensor.

6. “Fuel position” AND/ OR “FRC fuel limit.

7. Flash file.

8. Fuel quality.

9. Valve adjustment.

WORKSHOP TROUBLESHOOTING

Types of Breakdowns I Troubleshoot in the workshop Engine Overheating, Low Engine Power, Machine Difficult to Start, Slow Implement Movement, Oil Leakages, Low Engine Oil Pressure, Steering Oil Pressure Low or High, Brake Temperature High, Hard Steering, Bucket Bouncing

Pre-troubleshooting Procedures

Receive call from Mine Care concerning the breakdown location, problem and possible cause(s).

Assemble tools necessary for the job and proceed to site of breakdown.

Consult the operator of the machine to know the actual cause of the breakdown.

Assess the area around the machine for dangers (walk around inspection on the machine).

Put caution tapes and cones around for other workers and road users to be aware there is a broken down machine in the area.

I may operate the machine to test the problem if required.

I will then put off master key, lock out and tag out for safety purposes. TROUBLESHOOTING - EXAMPLES OF SOME I HAVE DONE

Problem: Parking brake cannot release

Troubleshooting Procedure – check hydraulic oil level, check parking brake filter to see if plugged, check for any leaking or burst hose, check parking brake release pressure. After troubleshooting, the scavenge

(gear pump) pressure was found below specification, so the scavenge pump (gear pump) was remove and dismantled. After dismantling, all the parts and O-ring seals were washed and checked for wear and damage. All damage parts were changed.

Assembly of Gear Pump -

-Lubricate all the O-ring seals lightly with lubricant that is being sealed.

-Install woodruff key onto the shaft of the gear pump.

-Align the slot of the gear with woodruff key. Position gear for installation onto the shaft of the gear pump.

-Use locknut and the hard washer to install gear onto the shaft of gear pump. Tighten locknut and torque to manufactures specification.

-A suitable lifting sling and a hoist were used to position the gear pump and gasket for installation.

-The mounting bolts were tightened to install gear pump to the torque converter housing.

-All hoses were connected to the gear pump

-The parking brake release pressure was checked again and was found to be up to specification.

-The parking brake was then release and machine moved for operation. Problem: Engine Overheating

Troubleshooting Procedure: Check coolant level, check fan belt tension, check coolant hoses for leaks, check water pump condition, check water regulator condition, check cylinder head gasket for damage, check for slack hose clip, and check radiator cores for leaks. After troubleshooting, it was found that the water pump was not working. So the water pump was removed, dismantled and reassembled. Removal of Water Pump

-The coolant was drained to a suitable container

-The bolts securing the tube to the pump were removed, the tube assembly was removed.

-A suitable lifting device was attached to the water pump.

-The water pump mounting bolts were removed.

-The water pump was removed

Dismantling Procedure for Water Pump

-Remove elbow and O-ring seal from water pump housing.

-Remove the washer that holds shaft assembly in the housing.

-Loosen nut from impeller, remove the impeller from housing.

-Remove spring.

-A soft hammer is used to push the shaft assembly out of seal assembly and housing.

-Remove ceramic seal and rubber ring from housing.

-Remove the lip seal from the rear of the housing.

-The dismantled parts were washed and then checked for wear and damage. The worn and damage parts were changed

Assembly Procedure for Water Pump

-Install lip seal on housing, place clean engine oil on lip seal.

-Install shaft assembly in the housing, fix washer and bolt. Install O-ring seal on the rear of the housing.

-Install ceramic seal and rubber ring in housing.

-Install spring, install impeller, and install washer and nut on impeller in housing. Tighten nut and torque it to manufacturer’s specification.

-Ensure that the studs for the cover are tight in the housing.

-Place clean engine oil on O-ring seal and install the O-ring on cover. Installation Procedure for Water Pump

-Attach a suitable lifting device to the water pump and place water pump in position.

-Install mounting bolts and remove the lifting device from water pump.

-Position tube assembly and fix bolts for the tube assembly.

-Fill the cooling system with coolant.

The machine was then tested and found to be working okay. Machines worked on (Caterpillar):

785C, 777D/F Dump Trucks; 16H, 16M and 140H Motor Graders; 773B/E Water Trucks; 844, 834 Wheel D10R, D10T, D9T, D8N, D6R Track Dozers

Company: Mantrac Ghana Limited

Job Title: Caterpillar Mechanic

Years: January 2010 - November 2010

Responsibilities:

PREVENTIVE MAINTENANCE

Involves washing of the machine to prevent contamination, taking samples of various oils for testing and inspection of machine to check for leakages (done while the engine is running). The machine is then parked with transmission in neutral, engine off, parking brake engaged, implements lowered, and master key off and locked. If machine is a dump truck, bucket is raised and locked. All oil is drained and then re-filled to specification. All filters are then changed and all identified leakages repaired. If it is dump truck, the accumulator pressure, suspension cylinders pressures and height are checked; if found below specification, it is recharged to manufacture’s specification. This done by using a nitrogen bottle fitted with pressure gauges: the valve in the hose (connected to nitrogen bottle) is attached to the valve on the accumulator and tightened inside the valve, then the valve on the nitrogen bottle is opened and gas is filled to specification. At the end, the machine is started and run for some time for leaks to be checked again if no leakage found it is finally tested and if found in good running condition, it is released for operation. FIELD SERVICE TROUBLESHOOTING

Types of Breakdowns I Troubleshoot in the Field

Engine Overheating, Low Engine Power, Machine Difficult to Start, Slow Implement Movement, Oil Leakages, Low Engine Oil Pressure, Steering Oil Pressure Low or High, Brake Temperature High, Hard Steering, Bucket Boun

Pre-troubleshooting Procedures

Receive call from Mine Care concerning the breakdown location, problem and possible cause(s).

Assemble tools necessary for the job and proceed to site of breakdown.

Consult the operator of the machine to know the actual cause of the breakdown.

Assess the area around the machine for dangers (walk around inspection on the machine).

Put caution tapes and cones around for other workers and road users to be aware there is a broken down machine in the area.

I may operate the machine to test the problem if required.

I will then put off master key, lock out and tag out for safety purposes. TROUBLESHOOTING - EXAMPLES OF SOME I HAVE DONE

Problem: Motor Grader cannot move forward or backward Troubleshooting Procedure – Check transmission oil level, check transmission filter for plugging, check transmission cables for damage, check transmission tubes for leaks and damage. After troubleshooting, it was found that the transmission pump pressure was below manufacturer’s specification. So, the transmission pump was removed and dismantled. After dismantling, all the parts and O-ring seals were washed and checked for wear and damage. All damaged parts were changed. Assembling of Transmission Pump -

-Lubricate all the O-ring seals lightly with lubricant from a sealed container (prevents contamination).

-Install woodruff key onto the shaft of the transmission pump.

-Align the slot of the gear with woodruff key. Position gear for installation onto the shaft of the pump.

-A suitable lifting sling and a hoist were used to position the pump and gasket for installation.

-The mounting bolts were tightened to install pump.

-All tubes was connected to the pump

-The transmission pump pressure was checked again and was found to be up to specification.

-The machine was tested and found okay.

Problem: Slow Implement Movement

Troubleshooting Procedure: check hydraulic oil level, check for leaking and burst hydraulic hoses, check hydraulic oil filter to see if plugged, check control valves for leaks, check hydraulic pump pressure, drain hydraulic oil and check for contamination. After troubleshooting, it was found that the control valve was faulty. So it was removed, dismantled and assembled after changing worn and damaged parts. Removal Procedure for Control Valve

- First release pressure from the hydraulic system by opening the hydraulic tank cover, then drain the hydraulic oil, then remove all hoses and tubes attached to the control valve.

-A suitable lifting device was attached to the control valve.

-The control valve mounting bolts were removed.

-The control valve was removed.

Dismantling Procedure for Control Valve

-Remove solenoid, actuator, spool, adaptors, and all seals.

-After dismantling, all the parts are washed and checks are made for worn and damaged parts. Assembly Procedure for Control Valve

-Apply a little clean oil on the spool and insert it well into its position.

-Install actuator, solenoid, all adaptors with seals well put on them. Installation Procedure for Control Valve

-Attach a suitable lifting device to the control valve and place valve in position.

-Install mounting bolts and remove the lifting device from control valve.

-Connect all hoses and tubes to the control valve.

-Fill the hydraulic tank with hydraulic oil.

The machine was tested and found to be operating properly. Machines worked on (Caterpillar):

785C, 777D Dump Trucks; 16H and 140H Motor Graders; 992G,966H Wheel loaders; 844, 834 Wheel Dozers; D10R, D10T, D9R, D8N, Track Dozers, Soil Compacters, and Excavators. TOOLS USED

Pneumatic Torque

Torque Wrench

Combination Set Spanners

Sockets Set Spanners

Pliers

Vernier Caliper

Micrometer

Hacksaw

Impact Wrench

Hydraulic Press

Sling

Chain

Shackle

Torque Multiplier

Wire Brush

Feeler Gauge

Axle Stands

Chain Block

Screw Driver

Scraper

Files

OTHER SKILLS I POSSESS

Ability to work under pressure

Responsive to change and eager to learn and tackle new mechanical operations Team player, especially joining hands with others to complete task on schedule Ability to work with little supervision

Ability to work for long hours

REFERENCES

Mr. Emmanuel Bagulo Mr.Emmaunel Ackah

Heavy Diesel Motor Mechanic Workshop Supervisor

Westrac Goldfield Ghana, Ltd.

Australia +233-*********

+614********

(Formerly:

Field Service Supervisor

Mining Maintenance Department

Goldfields Ghana Limited

Tarkwa, Ghana)



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