Yamato Scientific IM400W Shaking incubator - Manual (Page 26)

24
Maintenance
Daily Maintenance and Inspection
„
Adjustment of Tension of V Belt
Various problems may result from improper tension of the V belt. To avoid these, check and adjust the
tension approximately once every six months.
Adjustment Procedure
(１) Make sure that you unplug the power cord before
adjustment.
(２) Detach the left and rear covers.
(３) Loosen the four bolts that fix the motor mount
plate. (Loosen them only--you do not have to
remove them.)
(４) Loosen the lock nut and turn the adjuster bolt to adjust the tension of the belt so that the belt deflects by 8
mm when it is pulled by a 2 kg(f) weight.
(５) After adjustment, tighten the lock nut and then tighten the four fixing bolts.
(６) The following conditions may be observed if the belt is improperly tightened.
•
If the belt is too loose:
1. Slip (speed does not increase) or heating of the pulley
2. Wearing or cracking of the V belt
3. Unusual noises
•
If the belt is too tight:
1. Abnormal heating ( ≥
110°C) of the motor (normally
≤
80°C)
2. Damage to the motor shaft
(７) If the V belt wears severely, replace it with a new one. The model number of the V belt is M-40.
Shaker motor
V belt
Motor mount plate
Fixing bolts
V belt
Adjuster bolt
Lock nut
V belt
Large pulley
Small pulley
Spring scale (2 kgf)