GENERAL INFORMATION
GENERAL PRECAUTIONS AND FITTING INSTRUCTIONS
5
Dismantling
Observe scrupulous cleanliness when dismantling
components, particularly when brake, fuel or
hydraulic system parts are being worked on.
CAUTION: A particle of dirt or a cloth
fragment could cause a serious
malfunction if trapped in these systems.
•
Blow out all tapped holes, crevices, oilways and
fluid passages with an air line. Ensure that any
O-rings used for sealing are correctly replaced or
renewed, if disturbed during the process.
•
Use marking ink to identify mating parts and
ensure correct reassembly. Do not use a centre
punch or scriber to mark parts, they could initiate
cracks or distortion in marked components.
•
Wire together mating parts where necessary to
prevent accidental interchange (e.g. roller
bearing components).
•
Wire labels on to all parts which are to be
renewed, and to parts requiring further inspection
before being passed for reassembly; place these
parts in separate containers from those
containing parts for rebuild.
•
Do not discard a part due for renewal until after
comparing it with a new part, to ensure that its
correct replacement has been obtained.
Cleaning components
Always use the recommended cleaning agent or
equivalent.
WARNING: Ensure that adequate
ventilation is provided when volatile
degreasing agents are being used.
CAUTION: Do not use degreasing
equipment for components containing
items which could be damaged by the use
of this process.
General Inspection
•
Never inspect a component for wear or
dimensional check unless it is absolutely clean; a
slight smear of grease can conceal an incipient
failure.
•
When a component is to be checked
dimensionally against recommended values, use
the appropriate measuring equipment (surface
plates, micrometers, dial guages etc.). Ensure
the measuring equipment is calibrated and in
good serviceable condition.
•
Reject a component if its dimensions are outside
the specified tolerances, or if it appears to be
damaged. A part may be refitted if its critcal
dimension is exactly to its tolerance limit and it
appers to be in satisfactory condition.
•
Use ’Plastigauge’ 12 Type PG-1 for checking
bearing surface clearances.