Service manual

2. Overhauling

2-12

(2) Check the gap between the cooling fan and fan shroud

 Maintain an adequate gap in both the vertical and horizontal directions.

 If the fan is mounted incorrectly so that it leans toward one side wall of the shroud,

leading to a smaller gap in one direction, the fan may produce abnormal noise due to

rubbing against the shroud during starting or stopping and may also overheat.

SG05050

Gap size Unit : in. (mm)

SDG25S

-6A7

SDG45S

-6A6

SDG65S

-6A6

SDG100S

-6A6

SDG125S

-6A6

SDG150S

-6A6

Fan outer diameter

(a)

16.9 (430) ← 19.7 (500) 22.8 (580) 21.5 (546) ←

Shroud inner diameter

(b) 17.7 (450) ← 20.5 (520) 24.0 (610) 22.3 (566) ←

Top gap

Bottom gap

(d) 0.5 (13) ← ← 0.7 (18) 0.5 (13) ←

Side gap

(e) 0.4 (10) ← ← 0.6 (15) 0.4 (10) ←