Rotax 915 i A series Maintenance Manual page 52

No.
5
6
Exhaust valves and intake valves may NOT undergo a compressed air blasting
treatment with solid blasting, strong abrasive material. Due to this surface treat-
ment one does gain a microscopic surface pitting which does allow as a conse-
chemical reaction (especially of the sulfur and lead content of AVGAS) with the
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Page 32
August 01 2018
MAINTENANCE MANUAL HEAVY
Part no.
n.a.
Valve lapping paste
This paste, produced by various manufacturers, is a
fine granulate lapping paste for manual lapping of valve
seats and valves. The paste is usually available in 3 dif-
ferent granulate sizes. Use as per manufacturers
instructions.
n.a.
Compressed air blasting using a solid blasting
agent
This method is suitable for local and gradual very fine
treatment of steel parts with rust film (propeller shaft).
The Compressed air blasting contains no harmful sub-
stances, is approved by the competent authorities and
guarantees optimum cleaning. The granulates used
are of sizes 40 to 60 μ . The achievable surface rough-
ness is between 0.5 and 1 μ, which corresponds to ultra
fine machining of surfaces.
quence the adhesion of fuel residues. These deposits are then involved in a
valve material. This effect may cause hot-gas corrosion on the affected parts.
BRP-Rotax
Description, application
ATTENTION
Qty.
AR
AR
Effectivity: 915 i A Series
Edition 0/Rev. 0