Aircraft Technical Manual
Jabiru Aircraft
Pty Ltd
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
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ISSUE
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Dated: 29th October 2014
Issued By: AS
Page: 32 of 298
3.9
Special Tools & Compounds
Figure 8
– Sealants, Compounds & Lubricants #3
Loctite 620 is designed for the bonding of cylindrical fitting parts. Typical applications include
locating pins in radiator assemblies, sleeves into pump housings and bearings in auto transmissions.
Particularly suitable for applications where temperature resistance up to 200°C is required. Used as
a ultra-strong threadlock. Loctite 620 is specified in several places in the Jabiru Aircraft where a
reliable bond is essential. When using it, follow the rules below:
WARNING
Failure to use Loctite 620 correctly can result in bond failure.
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Check use-by dates.
Loctite 620 (like most other compounds) has a use-by date. Generally
this is not printed on the bottle but can be found by contacting the distributor and telling them the
batch number.
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Work fast.
Loctite 620 can cure very quickly. All screws must be torqued to final settings as
quickly as practical. Anything more than a minute is not recommended, particularly if cure
accelerator spray (Loctite 7471) is used.
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Only use as much as required/specified.
Excess compound can make it nearly impossible to
disassemble the parts later.
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Surface preparation is critical.
Threads must be cleaned and prepared properly.
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To Remove.
Can normally be achieved by heating the screw to over 150°C using a pencil-point
gas burner. Minimise direct heat applied to the head of the screw as this can weaken the drive
socket
– direct heat towards the thread as must as possible.
Loctite 290 is designed for the locking and sealing of threaded fasteners. Because of its low viscosity
and capillary action, the product wicks between engaged threads and eliminates the need to
disassemble prior to application. The product cures when confined in the absence of air between
close fitting metal surfaces and prevents loosening and leakage from shock and vibration. The
product can also fill porosity in welds, castings and powdered metal parts.
Loctite 262 is designed for the permanent locking and sealing of threaded fasteners. Typical
applications include the locking and sealing of large bolts and studs (up to M25 ). A medium strength
threadlock.
Loctite 243 is designed for the locking and sealing of threaded fasteners which require normal
disassembly with standard hand tools. Particularly suitable for applications on less active substrates
such as stainless steel and plated surfaces, where disassembly with hand tools is required for
servicing. A medium-strong threadlock. Typically used for cap screws into castings or Aluminium.
