Comass - Day 10
Overhauling and making a Gasket
We started this day with a short review with Chief Engineer De Guzman which outlines the maintenance
approach for a marine purifier, detailing procedures before, during, and after overhauling.
Before Overhauling
Maintenance Frequency: Check maintenance schedules based on running time and calendar.
Risk Assessment: Conduct a safety checklist to identify potential hazards.
Isolation: Isolate the system using lockout/tagout procedures.
Consult Manual: Review the manual for specific procedures, required spare parts, and tools.
Prepare Tools: Ensure all necessary tools are ready for use.
During Overhauling
Dismantling: Carefully disassemble the purifier components.
Marking Parts: Use markings for directional flow, fittings, and surfaces to ensure correct reassembly.
Cleaning: Clean all parts thoroughly and check for wear and tear.
Lubrication: Apply appropriate lubricants to moving parts as needed.
Adjustments: Make any necessary adjustments to ensure optimal performance.
After Overhauling
Run Testing: Conduct tests to confirm the purifier operates correctly under load.
Housekeeping: Clean the work area and ensure all tools are accounted for.
Documentation: Update preventive maintenance schedules and reports to reflect the completed work.
Maintenance Frequency Considerations
Plan Maintenance System: Establish a routine maintenance plan based on operational conditions.
Condition Monitoring: Regularly assess the condition of components to preempt breakdowns.
Breakdown Maintenance: Be prepared for immediate repairs in case of unexpected failures.
This structured approach ensures efficient operation and longevity of marine purifiers while maintaining
safety standards.
We then proceed to the workshop to work on making a gasket for 3 valves namely two gate valve and
one globe valve along with my group, first we take the measurements of inside and outside diameter of
the valve and the center to center diameter of the holes. We then mark each areas where we will make
a hole and proceed with boring holes by using a puncher and a hammer.
To continue the rest of the day, we proceeded to dissassembling the air compressor. First we remove
the cylinder block cover by using wrenches and from there we start to dismantle what is inside the air
compressor.
Parts of marine air compressor:
1. Cylinder Liner: Houses the piston and absorbs heat.
2. Piston: Compresses air; made from aluminum or cast iron.
3. Piston Rod: Connects the piston to the crankshaft.
4. Connecting Rod: Transfers motion from the crankshaft to the piston.
5. Crankshaft: Converts rotational motion into linear motion for the piston.
6. Suction and Discharge Valves: Control air flow in and out of the cylinder.
7. Intercoolers: Cool air between compression stages to improve efficiency.
8. Lubricating Oil System: Reduces friction among moving parts
