Z001019/0_7_January 2011
Page GENERAL-49
GENERAL
SERVICE MANUAL MARINE ENGINES
ToC
General guidelines of application for the of use of anaerobic sealing materials
Cleanliness of components
Non-metallic surface protection must be removed. In case of repair, soiled and oily components are to
be cleaned and residues of adhesive plastic material are to be removed. Thread bores are recut with the
appropriate thread bore and blown out with compressed air.
If solvents or degreasing agents are used for cleaning, take care that they are completely volatilized
before application of the epoxyl.
Storage
At temperatures below 28° C, 1 year minimum.
Guidelines of application for securing (S)
Designation: SM ....... Securing medium tight (the connection is to be loosened without problems)
Designation: SF ........Securing tight (the connection is difficult to loosen)
Application: Screw connections
Fixing procedure
In general, the application of the epoxy to the screw thread is sufficient.
If screws are screwed into socket threads, only the thread bore is wet in order to let the air escape during
screwing in.
Screws or nuts which are tightened with a specified torque, are slightly oiled on their support surface or
housing part.
Guidelines for fixing (B)
Designation: BM ....... Fixing medium tight
Designation: BF ........ Fixing tight
Application: Jointing connections, bushings, sprockets, belt pulleys, bearings etc.
Jointing procedure
In case of jointing connections both jointing parts are to be wetted. The wetting has to completely cover
the jointing surfaces. The parts are shifted into each other by turning, in case of slide fits.
No strength may be exerted to the connection until sturdiness is reached (for time, refer to Table 1).
Guidelines of application for sealing (D)
Designation: DR ....... Sealing of pipe connections
Designation: DF ........Sealing of plane surfaces
Application: Sealing of threads , screw connections, jointing connections and plane surfaces.
Hardening time
Use
S ecuring
Fixing
(B)
S ealing
C lass
S M
S F
BF
DR
DF
DF
Product
Loctite 243
Loctite 262
Loctite 620
Loctite 509
Loctite 510 Loctite 5900
Handtightness
reached after
15 - 30 min 15 - 30 min
5 - 10 min
15 - 30 min immediately immediately
Functional tightness
reached after
1 h
1 h
1 h
0.5 h
immediately immediately
Final tightness
reached after
3 h
3 h
4 h
12 - 24 h
24 h
12 - 24 h