6.MAINTAINING
6.1 Routine inspecting
6.1.1 Before each operating, please inspect and confirm that:
(1) All of the stoppers and screws of jack have been screwed up
tightly.
(2) The jack's pump without any oil-leaking.
(3) The pump body, tooth plate and its base without any cracking or
form deformation happening-changing.
(4) The pump should be operated normally without loading.
6.1.2 Under the frequent use of the jack, the time of checking shall
be shortened as well, and following checking points shall be
emphasized:
(1) All of the jack stoppers, screws, and nuts should be screwed up
sufficiently and should be adjusted when it necessary.
(2) When the jack is in loading state, please pump it totally until the
release valve opening and without any oil-leaking (but the oil spot on
the surface of pillar or valve stem is in normal).Please release the
pressure of pump and check the pillar to confirm the pillar being flat
and vertical without any shocking and scraping. If any damage of it
being found the pillar should be changed in time.
(3) When the jack is reducing, operator should check whether the
reducing movement is stable or not and it should be wedged (but
some slight vibration is in normal).
(4) Please, carefully check all of the exterior parts of jack including,
Pump body: no deformation, cracking and impacting on it;
Operating handle of pump: no deformation no over space in each
plug, otherwise the old plug shall be replaced by a new one;
Tooth plate: no deformation & cracking;
Base: no deformation &cracking.
