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Steelcase, Inc.

Grand Rapids, MI 49501
U.S.A.
1-888-783-3522

Tools

Assembly Directions

Printed In U.S.A.

REV

93-9501164   B  

Page 1 of 6

For Field Replacement of the Variable 
Back Locking Mechanism - Package 
Number 25-4540800

These directions apply to the following Con-Centrx® chair models:

Managerial chair:  451-141, 141M, 171, 171M, 147, 147M, 177 and 177M

Operator chair:  454-150, 150M, 180, 180M, 151, 151M, 152, 152M, 181, 181M, 182 and 182M

IMPORTANT:  Please read these directions completely through prior to starting step 1

A

W

L-O

-POWER

Содержание Con-Centrx 451-141

Страница 1: ...e Variable Back Locking Mechanism Package Number 25 4540800 These directions apply to the following Con Centrx chair models Managerial chair 451 141 141M 171 171M 147 147M 177 and 177M Operator chair 454 150 150M 180 180M 151 151M 152 152M 181 181M 182 and 182M IMPORTANT Please read these directions completely through prior to starting step 1 A W L O POWER ...

Страница 2: ...ays clear outer plastic seat shell and actuation force should not be excessive Variable Back Attitude Replacement and Mechanism Adjustment Should the chair fail to perform satisfactorily in any of the functions described above check adjustment per step 8 If adjustment is satisfactory and the variable back locking mechanism is not operating properly replace according to steps 1 thru 11 Package Cont...

Страница 3: ...k shell from upholstered back NOTE Extreme care should be taken with the screwdriver when removing screws to prevent damage to the outer plastic shell 10 SCREWS 1 2 LONG OUTER BACK SHELL 8 SCREWS 1 1 2 LONG 8 SCREW 1 1 8 LONG UPHOLSTERED BACK VARIABLE BACK LOCKING MECHANISM IMPORTANT THIS CIRCLED AREA INDICATES THE LOCATION FOR THE FOLLOWING STEPS 2 3 4 5 and 6 ...

Страница 4: ... control arm by hand Save adjustable control arm for the adjustment of new control arm Old removed parts are not to be used ADJUSTABLE CONTROL ARM 3 Remove the retainer ring from the end of the pivot pin by using the flat bladed screwdriver and slide pin out Remove overcenter spring and pawl from lower mounting bracket Old removed parts are not to be used PAWL ADJUSTABLE CONTROL ARM RETAINER RING ...

Страница 5: ...d gear assembly clock wise while at he same time lifting up thus removing it from the chair Old removed parts are not to be used 6 Remove retainer ring from the end of u joint pin by using a flat bladed screwdriver Slide pin out and remove u joint assembly RETAINER RINGS PIVOT BUSHING PIVOT BUSHING HOUSING AND GEAR ASSEMBLY HOUSING AND GEAR ASSEMBLY RETAINER RING U JOINT ASSEMBLY U JOINT PIN ...

Страница 6: ...parts NEW ADJUSTABLE CONTROL ARM Assembly Directions 93 9501164 REV B Page 6 of 6 EXISTING DIMENSION FOR OLD ADJUSTABLE CONTROL ARM LUBRIPLATE OR AMOCO GREASE U JOINT ASSEMBLY 8 Place the chair upright on the floor Check the chair to verify that all functions are operating properly Invert the chair back onto workbench and reassemble the outer back shell onto upholstered back This step is in revers...

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