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YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
D. Remove all traces of dirt, dust, debris and accumulated matter from parts. All parts must be
clean before they are installed on the engine. For specific cleaning guidelines, refer to
Chapter 05-30.
E. If adhesive tape has been applied to any part, remove the tape and all residue. Clean the part
completely.
F. Hardware
All cotter pins that are removed must be discarded and not reused. Install a new cotter pin
(1)
where a cotter pin was removed.
All safety wire and cotter pins must be made of corrosion-resistant steel and installed as a
(2)
snug fit in holes in studs and bolts for correct locking.
If safety wire or safety cable was removed during component removal, be sure to install
(3)
new safety wire or safety cable during component installation.
All safety cable installed on the engine must meet or exceed specifications in the latest
(4)
revision of AS3510. Safety cable must be installed per the safety cable manufacturer's
instructions and in accordance with specifications in the latest revisions of AS4536 and
AS567 and the latest revision of Service Instruction No. SI-1566.
The cotter pin head must install as a snug fit into the castellation of the nut. Unless
(5)
otherwise specified, bend one end of the cotter pin back over the stud or bolt and the
other end flat against the nut.
Torque a castellated or slotted nut to the value specified in this manual or the latest
(6)
revision of the Service Table of Limits - SSP-1776, if necessary, turn the nut up to one
additional hex to align the slot in the nut with the hole in the bolt.
If a lockplate is required when installing a bolt, torque the nut to the value specified in
(7)
this manual or the latest revision of the Service Table of Limits - SSP-1776. If necessary,
turn the nut up to one additional hex to align the flat on the nut with the tab on the
lockplate. Lockplate tabs must not be bent up on the corner of the nut.
Replace any damaged or unserviceable hardware, fasteners, studs, screws, bolts, nuts,
(8)
washers, and clamps with new parts.
Always replace lock washers and lock nuts with new lock washers and lock nuts.
(9)
Although the latest revision of Service Bulletin No. SB-240 identifies parts which must
(10)
be replaced after they are removed, in the case where other parts are removed, it is
recommended practice, prior to installation, to examine each part for damage or wear
and replace the part as needed in accordance with accepted practices and standards to
ensure that serviceable parts are installed on the engine.
G. Unless otherwise specified in this manual, refer to the latest revision of the Service Table of
Limits - SSP-1776 for:
• Standard torque values for fittings, plugs, and hardware fasteners
• Special torque requirements for fittings, valves, clamps, couplings, plugs, and other
hardware fasteners in various locations on the engine
• Dimensions
© 2021 Avco Corporation. All Rights Reserved
February 2021
05-00
Page 3
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