Specifications

(Figure 1) Pulley's degree of parallelism

(Figure 2) Belt tension

Belt deflection force

W(N)

C:Center distance (mm)

Fan bearing needs periodical grease supply in every 2000 hours. Supply grease

using a grease gun from a fill opening at the fan bearing. (Fig.4)

Recommended grease: Showa Shell Sekiyu "Alvania No.3"

• Fan bearing (P750, P900-F)

Fill opening

Fig.4 Bearing

To adjust the belt tension for P500-

model, tools in certain size (as shown

in Fig. 3-1/3-2) are required for

loosening the motor base fixing bolts.

• Tools for Adjusting Belt Tension

10.5

190

27.5

[Fig. 3-1] Extention bar [Fig. 3-2] Ratchet handle/9.5mm (3/8")

1) The fan pulley and the motor pulley must be aligned to meet the criteria shown in Figure 1 and Table 1.

2) Set the tension for the V-belt so that the deflection force falls within the range as shown in the table in!!-

3) After the belt has been broken in on the pulley (after 24 to 28 hours of operation), check the belt for

looseness and adjust the belt tension as specified in step (2) above as necessary. When setting the

tension for a new belt, set it to a value 1.15 times the deflection force W.

4) After the initial adjustment of the belt as described in step (3) above, readjust the belt tension every

2000 hours of operation. [The belt is due for replacement when the belt has been stretched by 2% of its

original length, including the initial stretch of 1%. (Approx. 5000 hours of operation)]

Note: Apply Screwlock (not supplied) to the retention screw on the pulley to prevent the screw from

loosening. Tighten the screw to the torque of 13.5 N·m. (Screwlock: Equivalent to ThreeBond 1322N)

(Table 1) Horizontal alignment of the pulley

Pulley

Degree of parallelism

K (arc-minute) Note

10 or smallerCast iron pulley Equivalent to 3 mm

[1/8 in.] of displacement

per 1 m[3-1/4 ft]

• Horizontal pulley alignment and proper belt tension