19
PERIODIC INSPECTION
In case of troubles and/or any abnormality stop operating the hoisting unit and take proper counter-measures by a
specialist possessing enough knowledge on the unit or by a dealer of our products. It may happen that the load chain
and the hooks fall in a dangerous state even if they show no remarkable changes in their function. It is therefore
indispensable to make a periodic measuring check based on "the Methods for Maintenance and Inspection" as stated
below. The periodic inspection should be normally made once a month. Exchange damaged or deformed parts with
new ones.
THE METHODS FOR MAINTANANCE AND INSPECTION
WARNING
Do not use parts and the chain hoist over the limit of use.
If any wearing parts are found in excess of the standard limit of use as stated below in carrying out the daily and
periodic voluntary inspections, they should be replaced for sure.
It is very dangerous to use parts over the standard limit of use.
When replacing load chains, be sure to use the load chain manufactured by us. Load chains manufactured by any
others are not applicabie.
1
.
Checking the load chain and its lifetime.
Rated
load
–
Number of falls
Link diameter –
P x 5mm
(new chain)
Limitation of
P x 5(mm) for use
150 Kg
Ø 3.1 – 46.5
47.4
2. Checking the hook and its Lifetime.
When the dimension shown by ‘’A’’ in the sketch has exceeded the limitation as specefied in table
2, the hook should be replaced with a new genuine one. It is very dangerous to use such a
deformed hook by making repair by heating and/or welding
Disassemble the chain stop bolt on the bottom hook and replace with a new on e when its shows
wear, bend or cracks.
o
Do not forget to set the split pin on re-assembling the stop bolt.
Table 2 – Limitation of deformed hook for use
The load chain begins to be broken from
even one piece of weak chain links and
thus it is important to carefully inspect the
whole chain. For checking the elongation, measure
the inner length of 5 links with a vernier caliper as
the above sketch shows. It is normally sufficient to
check the links in a distance of approx. every 50cm
but check them by making the measuring distance
shorter when the elongation of the chain is close
to the limitation for use stated in Table 1 so that
none of them will exceed the limitation for use.
Exchange the load chain with a new one which is
found by visual check to be clearly influenced by
higher temperatures or to be clearly deformed.
Furthermore, do not weld a load chain to the
original one by users themselves
Rated load (t) –
Number of falls
Value A(mm) on
new hook
Limit value A(mm)
150 Kg
24mm
25.2mm
REMA®
MANUAL©
Summary of Contents for Hoistman HM-15
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