1 Copyright  2005 All Rights Reserved A-dec 511 Dental Chair

2 Copyright  2005 All Rights Reserved Product Overview – Pg 10 n A-dec 511 Chair l Features  Headrest  Armrest  Baseplate  Back  Seat  Hydraulic Motor Pump Assembly

3 Copyright  2005 All Rights Reserved Chair Specifications – Pg 11 n Load Capacity l Patient 300 lb (135 kg) l Accessory 250 lb (113 kg) l Note: Bolt chair to floor n Power On/Off Button n Limp-Along Feature

4 Copyright  2005 All Rights Reserved Chair Specifications – Pg 12 n Chair Power Supply l Comes standard with the 511 chair l Electric switch connects the power supply to pilot air

5 Copyright  2005 All Rights Reserved Chair Flow Diagram – Pg 15

6 Copyright  2005 All Rights Reserved Service/Usage Information – Pg 16 n Chair Covers l Motor pump cover requires hex wrench l Lift arm cover: pull outward to flex cover over stops l Stop plate cover: pull tabs out over pegs

7 Copyright  2005 All Rights Reserved Service/Usage Information – Pg 17 n Factory Default Routine l Sets the base and back upper limits l Calculates new presets base on actual range of the chair l Verifies that the potentiometers work

8 Copyright  2005 All Rights Reserved Chair Circuit Board – Pg n Circuit Board Components l Refer to the table on page 18 and Figure 6 on page 19

9 Copyright  2005 All Rights Reserved Chair Circuit Board Revisions n Rev D l Adds bump up when chair lockout detected l Increased electrical current for lift and support arm limit switches, released 01/05 n Rev E l Base up/down travel limits can be set, released 04/05 n Rev F l Positioning improved when using button for x-ray/rinse, released 06/05

10 Copyright  2005 All Rights Reserved n Keep this slide hidden at all times l When viewed as a notes pages provides supporting information for the previous slide.

11 Copyright  2005 All Rights Reserved Circuit Board Components – Pg 20 n LED Identification

12 Copyright  2005 All Rights Reserved Hydraulic System – Pg 21 n How the Hydraulic System Operates l Motor-driven hydraulic pump with solenoids l Hydraulic cylinders l Hydraulic Fluid Reservoir  Check with base and back full up  Use only A-dec fluid n System holds 40 ounces l 1.18 liters.

13 Copyright  2005 All Rights Reserved Hydraulic System n Bidirectional motor l Replace as compete assembly n Depressurize the system before disassembling hydraulic components.

14 Copyright  2005 All Rights Reserved Hydraulic System – Pg 22 n Hydraulic Cylinders l The hydraulic cylinders operate during Base Up and Back Up functions. Springs and gravity retract the piston during Base Down and Back Down functions. l The chair seat travels vertically from a low point of 13.5” (343mm) to a high point of 31.5” (800mm) above the floor.

15 Copyright  2005 All Rights Reserved Chair Hydraulic Base Cylinder n Base cylinder replacement l Remove motor pump, lift arm and stop plate covers l Position chair base up l Lower chair on solid support l Remove rod screw and the pivot pin l Remove reservoir cap l Operate base down while pushing rod into cylinder l Remove 2 screws at base of cylinder l Remove hydraulic hose from cylinder

16 Copyright  2005 All Rights Reserved Chair Hydraulic Back Cylinder n Back cylinder replacement l Remove seat and back upholstery l Position chair back down l Remove hydraulic hose and vent line from cylinder l Remove snap ring at rear of trunion l Unscrew cylinder rod from bearing clevis using a 9/64 hex key through hole l Pull cylinder out from front of trunion

17 Copyright  2005 All Rights Reserved Hydraulic System – Pg 23 n Capacitor l The capacitor is energized during chair Base Up or Back Up functions. Voltage and  F specific

18 Copyright  2005 All Rights Reserved Hydraulic System – Pg 24 n Solenoids l Down only l Line voltage specific n How to Test Solenoids l To check for a failed solenoid, test the solenoids using a volt/ohm meter or magnetic pull test.

19 Copyright  2005 All Rights Reserved Hydraulic System n Pump Motor Assembly l Soft Start/Stop  Accumulator - dampens hydraulic shock by acting like a shock absorber. l Bi-directional Pump  Turns one direction for Base Up, the opposite for Back Up  Gravity and springs only for Base Down and Back Down Accumulator

20 Copyright  2005 All Rights Reserved Potentiometer – Pg 25 n Back and base pots are interchangeable assemblies l P/N

21 Copyright  2005 All Rights Reserved Chair Stop Plate – Pg 26 n Activation causes chair to stop down movement, PCB signals momentary base up

22 Copyright  2005 All Rights Reserved Swivel Brake – Pg 27 n Swivel Brake Adjustment l Release brake tension l Insert 7/64” hex wrench in through- hole and into adjustment screw l Turn wrench to right to increase brake friction

23 Copyright  2005 All Rights Reserved Headrest – Pg 28 n Drift Adjustment l Use 1/8” hex wrench l Turn clockwise to increase friction on glide bar

24 Copyright  2005 All Rights Reserved IPB – Pgs n Part Identification l Baseplate & Motor Pump Assembly l Hydraulic Hose & Solenoid Assembly l Lift Cylinder & Link Arm l Lower Assembly l Upper Structure/Swivel Assembly l Upper (Seat Assembly) l Headrest Assembly

25 Copyright  2005 All Rights Reserved A-dec 511 Dental Chair