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A-dec 511 Dental Chair

A-dec 511 Dental Chair. Product Overview – Pg 10. A-dec 511 Chair Features Headrest Armrest Baseplate Back Seat Hydraulic Motor Pump Assembly. Chair Specifications – Pg 11. Load Capacity Patient 300 lb (135 kg) Accessory 250 lb (113 kg) Note: Bolt chair to floor Power On/Off Button

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A-dec 511 Dental Chair

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  1. A-dec 511 Dental Chair

  2. Product Overview – Pg 10 • A-dec 511 Chair • Features • Headrest • Armrest • Baseplate • Back • Seat • Hydraulic Motor Pump Assembly

  3. Chair Specifications – Pg 11 • Load Capacity • Patient 300 lb (135 kg) • Accessory 250 lb (113 kg) • Note: Bolt chair to floor • Power On/Off Button • Limp-Along Feature

  4. Chair Specifications – Pg 12 • Chair Power Supply • Comes standard with the 511 chair • Electric switch connects the power supply to pilot air

  5. Chair Flow Diagram – Pg 15

  6. Service/Usage Information – Pg 16 • Chair Covers • Motor pump cover requires hex wrench • Lift arm cover: pull outward to flex cover over stops • Stop plate cover: pull tabs out over pegs

  7. Service/Usage Information – Pg 17 • Factory Default Routine • Sets the base and back upper limits • Calculates new presets base on actual range of the chair • Verifies that the potentiometers work

  8. Chair Circuit Board – Pg 18-19 • Circuit Board Components • Refer to the table on page 18 and Figure 6 on page 19

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

  10. Circuit Board Components – Pg 20 • LED Identification

  11. Hydraulic System – Pg 21 • How the Hydraulic System Operates • Motor-driven hydraulic pump with solenoids • Hydraulic cylinders • Hydraulic Fluid Reservoir • Check with base and back full up • Use only A-dec fluid 61.0197.00 • System holds 40 ounces • 1.18 liters.

  12. Hydraulic System • Bidirectional motor • Replace as compete assembly • Depressurize the system before disassembling hydraulic components.

  13. Hydraulic System – Pg 22 • Hydraulic Cylinders • The hydraulic cylinders operate during Base Up and Back Up functions. Springs and gravity retract the piston during Base Down and Back Down functions. • The chair seat travels vertically from a low point of 13.5” (343mm) to a high point of 31.5” (800mm) above the floor.

  14. Chair Hydraulic Base Cylinder • Base cylinder replacement • Remove motor pump, lift arm and stop plate covers • Position chair base up • Lower chair on solid support • Remove rod screw and the pivot pin • Remove reservoir cap • Operate base down while pushing rod into cylinder • Remove 2 screws at base of cylinder • Remove hydraulic hose from cylinder

  15. Chair Hydraulic Back Cylinder • Back cylinder replacement • Remove seat and back upholstery • Position chair back down • Remove hydraulic hose and vent line from cylinder • Remove snap ring at rear of trunion • Unscrew cylinder rod from bearing clevis using a 9/64 hex key through hole • Pull cylinder out from front of trunion

  16. Hydraulic System – Pg 23 • Capacitor • The capacitor is energized during chair Base Up or Back Up functions. • Voltage and mF specific

  17. Hydraulic System – Pg 24 • Solenoids • Down only • Line voltage specific • How to Test Solenoids • To check for a failed solenoid, test the solenoids using a volt/ohm meter or magnetic pull test.

  18. Hydraulic System • Pump Motor Assembly • Soft Start/Stop • Accumulator - dampens hydraulic shockby acting like a shock absorber. • Bi-directional Pump • Turns one direction for Base Up,the opposite for Back Up • Gravity and springs only forBase Down and Back Down Accumulator

  19. Potentiometer – Pg 25 • Back and base pots are interchangeable assemblies • P/N 90.1069.00

  20. Chair Stop Plate – Pg 26 • Activation causes chair to stop down movement, PCB signals momentary base up

  21. Swivel Brake – Pg 27 • Swivel Brake Adjustment • Release brake tension • Insert 7/64” hex wrench in through-hole and into adjustment screw • Turn wrench to right to increase brake friction

  22. Headrest – Pg 28 • Drift Adjustment • Use 1/8” hex wrench • Turn clockwise to increase friction on glide bar

  23. IPB – Pgs 29-47 • Part Identification • Baseplate & Motor Pump Assembly • Hydraulic Hose & Solenoid Assembly • Lift Cylinder & Link Arm • Lower Assembly • Upper Structure/Swivel Assembly • Upper (Seat Assembly) • Headrest Assembly

  24. A-dec 511 Dental Chair

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