General Fitting Instructions

General Fitting Instructions

Component removal
Whenever possible, clean components and the surrounding area before removal.
^ Blank off openings exposed by component removal.
^ Following disconnection, seal fuel, oil or hydraulic lines immediately using suitable blanking plugs or caps.
^ Seal open ends of exposed oilways using suitable tapered hardwood plugs or conspicuous plastic plugs.
^ Immediately a component is removed, place it in a suitable container; use a separate container for each component and its associated parts.
^ Clean bench and provide marking materials, labels and containers before disassembling components.

Disassembling
Observe scrupulous cleanliness when disassembling components, particularly when brake, fuel, air suspension or hydraulic system parts are disassembled. A particle of dirt or cloth fragment could cause a serious malfunction if trapped in these systems.

^ Blow out all tapped holes, crevices, oilways and fluid passages with dry, compressed air.

WARNING: Suitable eye protection must be worn.

^ Discard all seals and 'O' rings and replace with new when reassembling.
^ Use suitable marker ink to identify mating parts, do not use a scriber or center punch as they could initiate cracks or distortion.
^ Wire or tape mating parts together where necessary to prevent accidental interchange.
^ Suitably identify parts which are to be renewed and to those parts requiring further inspection. Keep these parts separate.
^ To ensure that the correct replacement part has been obtained, do not discard a part due for renewal until after comparing it with the new part.

Cleaning components
Always use cleaning agents which are suitable for the work being undertaken and the components being cleaned. NEVER use gasoline (Petrol) as a cleaning agent (degreaser). Always ensure that the component being cleaned is compatible with the cleaning agent.

Always follow the manufacturer's instructions regarding the use of cleaning agents and ensure that the environment in which the work is being undertaken is suitable. See Health and Safety Precautions for further information regarding cleaning.

General inspection of components
All components should be inspected for wear or damage before reassembling.
^ Always ensure that component to be inspected is clean and free from oil or grease.
^ When a component is to be checked dimensionally against design specified values, use the appropriate measuring equipment i.e. micrometers, verniers, surface plates, dial test indicators (DTI).
^ Always ensure that all measuring equipment is correctly calibrated before use.
^ Reject a component which is not within specified values/limits or if it appears to be damaged.
^ A component may be refitted if dimensions obtained during checking are at the maximum tolerance limit and it is in an undamaged condition.
^ Bearing journal clearances should be checked where necessary using Plastigage.