230 Universal Procedures Chair Rotational Base Brake System Separating Upper and Lower Base Castings Test and Repair
|
Model |
230-003 |
| Serial Number | All |
Removal
1.Route bungee cord across top of base column (under seat).
It may be necessary to run the Tilt Up function to route bungee cord under seat section.
2.Run Base Up function to its max height. Position chair so that foot and back sections are level as shown.
Always disconnect chair power cord before removing any covers or shrouds.
3.Remove bottom screws from inner shrouds.
4.Raise shrouds, then attach bungee cord hooks under shrouds on both sides.
5.Partially separate PC board cover. Do not disconnect wire harnesses.
6.Remove shroud spacer.
7.Remove wire harness cover.
8.Disconnect ground wire for lower harness (A). Remove cable ties securing lower harnesses (A and B) to base.
The chair weighs approximately 540 lbs (244 kg). Use supports designed for this amount of weight.
9.Position sawhorses (or other suitable supports) under back section weldment and foot section weldment.
The chair top / upper base is not secured once the hubscrews are removed. Hold onto the chair when performing the following steps.
10.Remove four hub screws.
Step 11, requires power to be connected to the chair. Avoid all contact with wiring and electrical components.
The two lower wire harnesses are still connected to upper casting. Running the Base Down function too long may result in damage to the chair.
11.Press Base Down button on hand or foot control until upper and lower base castings separate slightly.
Disconnect the chair power cord before performing steps 12 thru 14.
12.Disconnect wire harness from J2 and J3 on rotational base PC board.
13.Disconnect wire harness from J9 on main PC board.
14.Slide lower base assembly out.
Installation
Disconnect the chair power cord before performing steps 1 and 2.
1.Slide lower base assembly under chair.
To ease installation, align the new lower base assembly in the same position as the old base.
2.Route wire harnesses thru upper casting. Reconnect all wire harnesses as shown.
Steps 3 and 4 require power to be connected to the chair. Avoid all contact with wiring and electrical components.
The chair top / upper base is not secured until the hub screws are installed. Hold onto the chair when performing the following steps.
3.Press Base Up button on hand / foot control until chair raises (slightly) off of sawhorses.
4.Carefully adjust chair top until alignment studs on bottom of upper casting lock into the notches on the rotation wheel.
You will feel chair top drop into place when alignment studs engage notches.
Disconnect chair power cord before performing the remaining Installation steps.
5.Install four hub screws.
6.Replace all cable ties. Connect ground wires for lower harness (A).
7.Install wire harness cover.
8.Install shroud spacer.
9.Replace PC board cover.
10.Remove bungee cord. Secure inner shrouds w/screws.
