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Section 05
Routine Maintenance
- wearing parts
05.5 DIMENSIONS OF WEARING PARTS
The following information is given as a guide to the
extent by which components may reasonably be
expected to wear, without appreciable loss of
performance. To maintain the engine in good running
order it is therefore recommended that when the
"Maximum Clearance" figure is reached, one or more
components affecting the clearance be replaced.
The wear to be allowed in parts refitted to an engine
depends on the life required to the next overhaul and
the relative cost of labour and materials. If labour costs
are high it may pay to replace parts before the
maximum wear condition is reached to avoid further
work before the next scheduled overhaul.
Cylinder Bore Wear
The maximum advisable piston to cylinder
clearance given is the clearance between the bottom
of the piston skirt, across the faces, and the cylinder
bore measured in the region of travel of the piston
skirt. The clearance is not to be measured at the top
of the bore.
When cylinders are rebored the lower skirt should
be etched or painted with the amount of the over-size.
Piston Ring Wear
The ring gaps given in the table are those to be
anticipated when checking rings in an unworn part of
the bore. For every 0.01mm (0.0004in) by which the
actual bore size exceeds the initial dimension, the
ring gap will increase by approximately 0.03mm
(0.0012in).
The firing ring side clearance is measured with a
new ring flush with the top piston land.
Oversize and Undersize Items
Oversize pistons and piston rings, and undersize
big end and main bearing shells are available.
Reference should be made to the relevant Master
Parts Manual for the relevant part numbers.
The variations from the standard dimensions are:
0.010in (0.254mm)
0.020in (0.508mm)
0.030in (0.762mm)
0.040in (1.016mm)
Non-standard sizes are marked, by the amount
they are under or oversize, as a suffix to the part
numbers which can be found in the following locations:
a. Piston Rings - stamped on the face of the ring.
b. Pistons - stamped on the top surface.
c. Bearings - stamped on the steel outside surface
of the bearing.
Summary of Contents for TR1
Page 1: ...TS TR TX Workshop Manual Edition 12 May 2005 Publication P027 08221 ...
Page 2: ...page 2 ...
Page 80: ...page 80 Section 05 Routine Maintenance TS TR wearing parts TS TR Wearing Parts ...
Page 81: ...page 81 Section 05 Routine Maintenance TS TR wearing parts TS TR Wearing Parts ...
Page 82: ...page 82 Section 05 Routine Maintenance TX wearing parts TX Wearing Parts ...
Page 83: ...page 83 Section 05 Routine Maintenance TX wearing parts TX Wearing Parts ...
Page 90: ...page 90 Section 07 Flywheel Charge Windings Syncro Syncro Fault Finding Flow Charts ...
Page 91: ...page 91 Section 07 Flywheel Charge Windings Syncro Syncro Fault Finding Flow Charts ...
Page 93: ...page 93 Nicsa Fault Finding Flow Charts Section 07 Flywheel Charge Windings Nicsa ...
Page 94: ...page 94 Section 07 Flywheel Charge Windings Nicsa Nicsa Fault Finding Flow Charts ...
Page 95: ...page 95 Section 07 Flywheel Charge Windings Nicsa Nicsa Fault Finding Flow Chart ...
Page 96: ...page 96 ...
Page 98: ...page 98 Section 08 Electrical Wiring Diagrams ...
Page 99: ...page 99 Section 08 Electrical Wiring Diagrams ...
Page 100: ...page 100 Section 08 Electrical Wiring Diagrams ...
Page 101: ...page 101 Section 08 Electrical Wiring Diagrams ...
Page 102: ...page 102 Section 08 Electrical Wiring Diagrams ...
Page 103: ...page 103 Section 08 Electrical Wiring Diagrams ...
Page 104: ...page 104 ...
Page 115: ...page 115 Section 11 Index Section 11 Index a ...