Cook Automatic Belt Tensioner Supplement II Bedienungsanleitung PDF herunterladen

AWB, EWB, XLWH, XMWH, APB, EPB, XLPH, XLWH, H-Series, ETE, ETS,

LXU, LEU, and LTU Units - Sizes 20 to 72

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Automatic Belt Tensioner Supplement II

This publication contains the installation, operation

and maintenance instructions for the Automatic Belt

Tensioner.

Carefully read this publication prior to any installation

or maintenance procedure.

Loren Cook brochure, Automatic Belt Tensioner, provides

additional information describing the equipment, fan perfor-

mance, available accessories, and specification data.

For additional safety information, refer to AMCA publica-

tion 410-96, Safety Practices for Users and Installers of

Industrial and Commercial Fans.

All of the publications listed above can be obtained from

Loren Cook Company by phoning (417)869-6474, extension

166; by FAX at (417)832-9431; or by e-mail at info@loren-

cook.com.

For information and instructions on special equipment,

contact Loren Cook Company at (417)869-6474. The Auto-

matic Belt Tensioner uses sealed bearings which do not

require maintenance and contains no user-serviceable

parts. Do not disassemble the belt tensioner.

Belt Tensioner Mounting Instructions

Unit Sizes 20 - 36:

1. Fasten mounting bracket to outside surface of bearing

support plate using 2 wizz bolts and nuts through the

upper slot as shown. Adjust bracket to lowest point and

tighten mounting bolts fully.

2. Set belt tensioner assembly on top surface of the

bracket and line up with hole. Bring a 3/8-16 x 1-1/4 bolt

through the hole and thread it into the bottom of the ten-

sioner.

Unit Sizes 42 - 72:

1. Fasten belt tensioner motor plate to the bearing support

plate using 8 wizz bolts and nuts as shown.

2. Set belt tensioner assembly on the top flange of the

motor plate and line up with inside hole (use outside

hole for 20” sheaves and larger). Bring a 3/8-16 x 1-1/4

bolt (7/16-14 for RT4000) through the hole and thread it

into the bottom of the tensioner.

Belt Tensioner Alignment and Tensioning Instructions for

Clockwise Units:

1. Tighten the bolt finger tight allowing tensioner assembly to

rotate freely.

2. Align driver and driven sheaves with tensioner idler pulley.

3. Install belt around all sheaves and rotate tensioner coun-

terclockwise (clockwise for counter clockwise units) until

belt feels tight and you feel light spring tension.

4. While holding tensioner at this position, use a marking

pencil to make an alignment mark on the tensioner and

the outboard bearing support so that the tensioner can be

rotated back to the mark after removing the belt.

5. Remove the belt and realign the marks on the tensioner.

Now rotate the belt tensioner assembly counterclockwise

(clockwise for counter clockwise units) until the alignment

marks are spaced approximately 1/2” to 3/4” apart.

6. Tighten mounting bolt fully and install belt by wrapping it

around tensioner idler pulley. Use palm of hand and rotate

tensioner arm clockwise (counterclockwise for counter

clockwise units) until there is enough slack in the belt to

allow it to slip over the driver pulley and then the driven

pulley. If using RT4000 tensioner and spring force is to

much to rotate tensioner arm enough to install belts by

hand, use procedure given in Notes 2 & 3.

7. Check belt tension by pushing on the belt on the tension

side. Note that the tensioner will move in as more force is

applied by pushing on the belt. Hold the end of the belt

tensioner arm stationary with firm hand pressure and push

on the belt again. If the tension feels right and the ten-

sioner arm doesn’t move with an equal amount of force

applied, then the tension should be correct. If there is any

doubt that the tension is correct, check it by starting the

fan and listening for belt squeal. If excessive belt squeal is

heard - loosen tensioner mounting bolt, and rotate ten-

Automatic Belt Tensioner

BELT TENSIONER IDENTIFICATION DETAIL

BI-DIRECTIONAL

TENSIONER

DIRECTIONAL ARROW

(SEE RT3000/RT4000

INSTALLATION NOTES)

DIRECTIONAL ARROW

(SEE RT3000/RT4000

INSTALLATION NOTES)

RT1000 WITH

1 GROOVE “A”

BELT IDLER

RT3000 WITH

2 GROOVE “A”

BELT IDLER

RT4000 WITH

2 GROOVE “B”

BELT IDLER

Caution:

Do not use the top assembly nut to add additional ten-

sion as this may potentially cause damge the ten-

sioner. It must be re-positioned per tensioning

assembly instructions.

1 2

Inhaltsverzeichnis

Seite 1 - Automatic Belt Tensioner

AWB, EWB, XLWH, XMWH, APB, EPB, XLPH, XLWH, H-Series, ETE, ETS, LXU, LEU, and LTU Units - Sizes 20 to 72 INSTALLATION, OPERATION, AND MAINTENANCE MAN

Seite 2 - LOREN COOK COMPANY

2Size 42 - 72Power Assembly-CW1221Size 20 - 36Power AssemblyMOUNTINGBRACKET123SLACK SIDE OF BELTNOTES:TENSION SIDE OF BELTIF NECESSARY, ADJUST HEIGHTO

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Cook Automatic Belt Tensioner Supplement II Bedienungsanleitung

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