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7. A belt should be just tight enough to avoid slippage.
8. Align pulleys with a straight edge to conserve belt life
and eliminate unnecessary noise.
9. Check tension before start-up, after every pulley
adjustment and regularly thereafter.
SET SCREWS:
Ensure all set screws on both pulleys and blower wheel are tight.
ELECTRICAL:
Connect motor in accordance with applicable codes. Provide properly sized motor overload protection to protect motor against elec-
trical faults and system changes. Confirm proper motor rotation on start-up.
MAINTENANCE:
Inspect periodically for mounting rigidity. Verify belt for wear and tension and adjust as required. Inspect wheel for any dust accumu-
lation and clean as needed. Caution — Do not dislodge balancing clips. Check set screw for tightness.
LUBRICATION:
Ball bearings with sealed in lubricant is used on all models. No additional lubrication is required.
Model VDBA Series Blower Belt Length Selection Table
Blower
Model
824-1125 RPM
07
09
10
12
15
• Standard Drive with 3-1/4" x 1/2" v. s. Motor Pulley •• Standard Drive with 3-1/4" x 5.8" v. s. Motor Pulley
Motor
Blower
Pulley
Pulley
Cast Iron
Cast Iron
HB77T
HB87T
HB97T
#8325
HB107T
HB117T
HB127T
O.D. 3.25"
HB137T
HB157T
HB187T
HB47T
HB57T
HB67T
#IVL44
HB77T
HB87T
HB97T
O.D. 4.15"
HB101T
HB117T
HB127T
HB137T
HB157T
HB187T
HB77T
HB87T
HB97T
#8400
HB107T
HB117T
HB127T
O.D. 4.15"
HB137T
HB157T
HB187T
FOR FRACTIONAL HP APPLICATIONS "4L" BELTS MAY BE SUBSTITUTED BY ADDING 2" TO THE SPECIFIED "B" BELT. EG. 850 BELT = 4L52.
5"
6"
680-929 RPM
580-792 RPM
4L33
4L34•
4L36
4L38
4L38
4L40
4L42
4L43
- - -
- - -
RPM Range
756-568
667-500
Note:
596-447
Blower Pulley
538-404
Model Number
491-368
Specifies O.D.
452-339
418-314
Eg.
364-273
HB47T = 4.7" O.D.
304-228
1630-1232
1329-1005
1121-848
969-733
854-645
763-577
690-521
629-476
678-437
535-404
466-352
390-295
1253-1017
1104-896
1005-815
907-750
828-686
756-618
697-575
616-509
522-435
3-1/4" Dia. Zinc Die Cast Blower Pulley — Dia. & RPM RangeBlade Length
7"
8"
505-690 RPM
447-611 RPM
4L36•
4L38•
4L40•
4L42
4L41
4L43•
4L45
4L47
- - -
- - -
Blower
07
09
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
B32
B36
B34
B38
B36
B39
B37
B41
B39
B43
B41
B45
B43
B45
B45
B48
B47
B50
B49
B52
- - -
B56
- - -
B63
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
2
BELT SHOULD SQUEEZE
BY NO MORE THAN 1"
9"
10"
401-548 RPM
533-455 RPM
4L40•
- - -
4L44
4L45
4L45
4L47
4L48•
4L50
4L54
4.55••
Model
10
12
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
B38
B42
B40
B43
B41
B45
B43
B47
B45
B48
B47
B50
B49
B51
B50
B54
B52
B56
B54
B57
B58
B61
B64
B67
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
12"
Based On
Motor Frame
- - -
- - -
48 Frame
- - -
4L54
4L59
56 Frame
Belt Length
Based On
15
Motor Frame
B49
143
B51
B52
&
B54
B56
145T
B58
- - -
Frame
- - -
- - -
- - -
Models
- - -
07 - 12
- - -
B51
B42
48 Frame
B54
(Add 1" For
B56
56 Frame)
B58
B60
Model 15
- - -
- - -
143, 145T
- - -
Frame
B52
B54
182, 184T
B56
Frame
B58
B59
(Deduct 2"
B61
For 56,
B63
143, 145T)
B56
- - -
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