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01252 359760 • ajproducts.co.uk
5.4.3
Operators should be very careful to use different jacks to lift a heavy-duty
weight. It attention to the shifting of center of gravity during reducing or
lifting the weight. The total lifting weight of all jacks should be larger than
load of lifted weights.
5.4.4
The owner of jack should guarantee all of the stick labels concerning
safety standards keeping on its relative locations, which should be
replaced when they can not be read clearly.
5.4.5
This operation manual can not cover all situations, please follow each step
of it cautiously.
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
movemnets 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 and cracking.
Base: no deformation and cracking.
7. ADD OIL
If the jack can not be pumped up to its rated high-test position, you may have
to add hydraulic oil into the oil tank. The hydraulic fluid to be used must have a
quality of ISO VG22 or equivalence. Mixing of difference fluids is prohibited!
8. TROUBLE SHOOTING GUIDE
Items
Symptom
Possible cause
Aliments
1
Jack can not
be pumped up
properly
The release
valve in not
closed
1. Screw in the unload
handle (16) tightly in clock-
wise direction.
2. Loose the screw (37)
to release the air from the
pump, then screw in it tightly
2
Jack can not be
released down at
the top position
The release
valve is not ope-
ned enough
Screw out the unload handle
(16) in counter - clockwise
direction
3
Jack can not be
pumped up to its
rated high-test
position
Oil is not enough
Screw out the screw (10),
add hydraulic oil
4
The oil has
leaked, around
the plunger
Seals are worn
out
Replace worn seals with
new seals (8) and (9) in the
spare parts bag
