10
ALWAYS THE BEST SOLUTION
HITROL CO., LTD
2-2. Installation of Spring motor
The spring motor should be set after the measuring tape has been stretched
in position.
1) Put disassembled spring loaded drum (1) and (2) in places.
2) Fix the spring on spring loaded drum (1) to the locking screw on spring
loaded drum (2) with a bolt. The spring should be wound clockwise so
locking screw should be positioned right side when the spring is fixed to
the spring loaded drum (2) as shown in Fig. 4.
3) Wind the spring clockwise about two or three turns in order to prevent the
derailment of the spring from spring loaded drum.
4) After winding of spring, fix the spring loaded drum (2) to the tape storage
sheave.
5) Complete the installation of spring motor after fixing by upper locking ring.
[Fix all spring loaded drum (1) and (2)]
* PRECAUTION :
• When the spring motor gets out of the spring loaded drum (larger) or
excessive force is applied to it, it produces non-uniform torque which
may be cause of erroneous indication.
• At the stage to wind the spring motor from the smaller drum to the
larger one, do not leave your hand from the larger drum until the
measuring tape is tensed finally.
* ASSEMBLY INSPECTION :
• After the installation of measuring tape and spring motor is finished,
pull out the measuring tape which is out from gauge head and check
if there is a jam or derailment. When the tape is loosed, the spring
should be wound. If there is a jam or derailment after pulling out the
measuring tape, adjust finely using a screw.
Spring loaded drum (1)
Spring loaded drum (2)
(smaller)
(larger)
Locking screw
screw + nut
[Fig.4]
