U20-3, U25-3 WSM General
I-6
E.SERVICING FUNDAMENTALS
a. Items for Servicing
(1) Tighten bolts, nuts, adapters,and similar parts
to their specified torques which are given in the
list of tightening torques and adhesive as well
as in this manual. Be sure to observe the
specified torques for important tightened parts
and components.
(2) Wipe out water, oil and grease off the screws
on which LOCTITE adhesive is to be applied.
Be sure to apply the adhesive to specified
locations.
The word “LOCTITE“ in this manual denotes the
red-color type.
(3) Precautions in disassembling the hydraulic
equipment
• Use a vacuum pump, plugs, oil pans, waste
cloth and the like to prevent oil from
running out or splashing.
Wipe out leaking oil completely first and
then add oil as required.
• Protect the openings with plugs, covers or
the like to keep off foreign matters. Most of
hydraulic system troubles are caused by
the entry of foreign matters.
• Before reassembling, clean up the parts
and components and apply hydraulic oil on
them.
• The system consists of precision parts. Be
careful not to scratch them and apply
excessive force on them.
Locking adhesive
Types of screw adhesive
Equivalent to LOCTITE 271 (Heavy-duty)
Equivalent to THREE-BOND 1305P (Heavy-duty)
Equivalent to THREE-BOND TB1401B (Light-duty)
Unless specified otherwise, use THREE-BOND 1324
(Medium-duty).
Type of instantaneous adhesive
Use THREE-BOND 1733 or 1741E
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