Steelcase Con-Centrx 451-141 User Manual

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
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Steelcase Con-Centrx 451-141 Specifications

General

Brand	Steelcase
Model	Con-Centrx 451-141
Category	Indoor Furnishing
Language	English

Summary

Variable Back Locking Mechanism Field Replacement

Mechanism Operation

Details how the variable back locking mechanism should function correctly.

Package Contents

Lists all parts included in the replacement kit.

Variable Back Locking Mechanism Replacement Steps

Step 1: Prepare Chair for Disassembly

Invert the chair and remove the outer back shell and screws.

Step 2: Remove Adjustable Control Arm

Detach the adjustable control arm from the pawl using a screwdriver.

Step 3: Remove Pivot Pin and Overcenter Spring

Remove the retainer ring, pivot pin, overcenter spring, and pawl.

Step 4: Remove Pivot Bushings

Remove retainer rings from pivot bushings and discard bushings.

Step 5: Remove Housing and Gear Assembly

Turn and lift the housing and gear assembly off the chair.

Step 6: Remove U-Joint Assembly

Remove the retainer ring and slide out the U-joint assembly.

Step 7: Install New Parts and Adjust Control Arm

Install new U-joint assembly, grease, and adjust control arm length.

Step 8: Reassemble and Verify Functionality

Reattach the outer back shell and test all chair functions.