MedViron OBT 46 User manual

Service Manual
46” Medviron Overbed Table

Table of Contents
Section 1 Cable Tension Adjustment
Section 2 Caster Replacement
Section 3 Plug Replacement
Section 4 Top Replacement
Section 5 Gas Spring Replacement
Section 6 Pedestal Service
Section 7 Vanity Service

Section 1: Service Instructions OBT 46” – Cable Tension
Adjustment
This manual is intended for trained professionals for adjustment of the Knú Overbed Table. Any
action not outlined in this manual may result in voiding of the warranty.
The overbed table is designed with a system that allows for adjustment of the gas spring cable tension in
the field. As the table acclimates to its environment, the gas spring pressure may cause the cable to
require adjustment. The most likely causes of gas spring issues are cable tension and wear over time.
Before attempting the adjustment, lower the table to 2” above the lowest setting. With hands spread at
each end of the table, push down repeatedly until the table rises to its highest setting. This may fix the
gas spring.
Tools required
#2 Phillips screwdriver
OBT Wrench (provided)
1.0 Table drifts down without application of the handle
1.1 This adjustment requires a #2 Phillips screwdriver.
Using the screwdriver, remove two screws from the plate
as shown in Figure 1. After removal of the plate, take the
wrench from the gasket. This wrench is used to adjust the
cable tension.
Figure 1
Figure 2
1.2 Adjusting the cable tension. All rotations are given looking from the turnbuckle to the lock nut.
Using the wrench, first loosen the lock nut (Figure 2) ¼ turn with the large end of the wrench by turning
counter clockwise. Next, with the small end of the wrench loosen the turnbuckle (Figure 2) ¼ turn
(clockwise). Check the table to see if the downward drift is still present. If so, continue releasing the
turnbuckle ¼ turn at a time until the drift is gone. Tighten the lock nut (clockwise) and replace the plate,
gasket, and wrench.

Section 2: Service Instructions for
MedViron Overbed Table Caster Replacement
This manual is intended for trained professionals for adjustment of the MedViron Overbed Table. Any
action not outlined in this manual may result in voiding of the warranty.
Tools required
½” Open end wrench
2.0 Turn the over bed table upside down
To replace casters that are worn or malfunctioning, first raise the unit to its fullest extension. Turn
the over bed table upside down and place on a protected surface such as a blanket (may require
assistance).
2.1 Removing and replacing the caster and post
Using a ½” open end wrench, loosen each caster post by turning nut counter clockwise with a
wrench and remove the caster and washer. Replace the washer and caster with new parts.

Section 3: Service Instructions
MedViron Overbed Table Base Plug Replacement
This manual is intended for trained professionals for adjustment of the MedViron
Overbed Table. Any action not outlined in this manual may result in voiding of the
warranty.
Tools required
Soft Mallet or Hammer
Punch
3.0 Turn the over bed table upside down or on its side
To replace damaged or worn end plugs, first raise the unit to its fullest extension. Turn the
over bed table upside down or on its side and place on a protected surface such as a
blanket (may require assistance).
3.1 Removing and replacing the plug
Insert a punch through the caster hole (as shown) and tap on the back side of the plug.
Remove the plug. Insert a new plug carefully, inserting all sides evenly and equally. If
necessary, tap the plug with a soft mallet or hammer.

Section 4: Service Instructions OBT 46” Top Replacement
This manual is intended for trained professionals for adjustment of the Medviron Overbed Table.
Any action not outlined in this manual may result in voiding of the warranty.
Tools required
#3 Phillips Screwdriver (powered driver not recommended)
4.0 Remove the top
Raise the unit to its fullest extension. Remove drawer tubs or shelves (pedestal, cover plate, and handle
sleeve do not need to be removed for top replacement). Remove (12) countersunk screws from the
underside of the plate. Lift top up and off of the plate.
4.1 Replace the top
Place the new top on the plate and align the holes. Replace the screws with care. Do not cross thread
or over-tighten. Replace drawer tubs or shelves.

Section 5: Service Instructions –Gas Spring
Replacement MedViron 46” Overbed Table
This manual is intended for trained professionals for adjustment of the MedViron Overbed Table. Any
action not outlined in this manual may result in voiding of the warranty.
Before moving to this step, first attempt the adjustment in Section 1.
The overbed table contains a single locking gas spring for height adjustment. This gas spring keeps
the table from being lowered until the handle is activated, but allows free rise. Gas springs can lose
force over time, which will cause the table to descend faster when activated.
Tools required
#2 & #3 Phillips Screwdriver (Powered driver not recommended except where noted)
7/16” socket or wrench
Block (provided)
5.0 Replacing the gas spring
5.1 Lift table to the highest adjustment position. Remove shelf or drawer pedestal following
instructions in Section 6.

5.2 Remove the top as shown in Section 4.
5.3 Remove the cover plate and wrench as shown in Section 1. Loosen the cable turnbuckle by
first loosening the lock nut, then unfasten the end of the cable attached to the handle. Next remove
the other end of the cable from the gas spring lever (Figure 1).
5.4 Remove the top plate by first loosening (4) screws (Figure 1). A power driver may be
required for this operation.
Figure 1 Figure 2
5.5 Remove the top washer by removing the 2 screws that are attached to the upper column,
NOTE: keep hold of the upper column while removing the screws to prevent the column from
dropping. Next loosen the 2 nuts holding the gas spring to the top washer. Remove the top nut &
the top washer & set aside (Figure 2).
Figure 3

5.6 Remove the base. Place the shelf or drawer pedestal unit on a soft surface such as a
blanket. Place another blanket or padding on the top side of the pedestal. Lay the column on the
pedestal and remove four bolts (Figure 3).
5.7 Remove the bottom washer. Remove two screws in the bottom of the column’s bottom
washer. Pull the gas spring out of the column. Unsnap the clevis pin and remove the bottom
washer (Figure 4).
Figure 4
5.8 Assemble bottom washer to the new gas spring using the clevis pin (Figure 4).
5.9 Insert the gas spring into the column and attach the bottom washer to the column with the
two screws removed in step 5.7
5.10 Attach the X-Base to the column using the screws and washers removed in step 5.6 (Figure
3).
5.11 Attach the top washer removed in step 5.5 to top of gas spring. Thread on the top nut.
Adjust the nut setting so that the “L” lever is perpindicular (Figure 2).
5.12 Attach the upper column to the top washer. Use the provided block to boost the upper
column (Figure 5). Activate the gas spring lever and push the top plate down, aligning the plate
and column holes. Attach with the 2 screws removed in step 5.4 (Figure 2).

Figure 5
5.13 Attach the Top plate to the column with the 4 screws removed in step 5.4 (Figure 1). Reattach
both ends of the cable to the handle & gas spring lever. Adjust the cable so that there is a small
amount of slack to ensure that the gas spring is not activated. Secure the lock nut.
5.14 Attach the top as shown in Section 4. Make sure the pins for the hanging pedestal are in the
plate.
5.15 Attach the hanging pedestal and shelves as described in Section 6.
5.16 Let the unit sit for 10 minutes to check for downward drift. If unit drifts, adjust as shown in
Section 1.
5.17 Reattach cover plate with wrench and gasket.
Section 6: Service Instructions
MedViron Overbed Table 46” Pedestal

This manual is intended for trained professionals for adjustment of the MedViron Overbed Table.
Any action not outlined in this manual may result in voiding of the warranty.
Tools that may be required
#2 & #3 Phillips screwdriver
5mm Hex drive
6.0 Servicing the pedestal unit
6.1 Removing the pedestal from the unit
Raise the unit to its fullest extension. If only replacing drawers or shelves, remove as
illustrated in the User Manual and replace with new part(s). If replacing sides or rods, move
to the next step.
Remove drawers or shelves. Have an assistant hold the pedestal. Turn (4) cams counter-
clockwise with a #3 screw driver so the arrow on the cam points up (Figures 1&2). The
pedestal should be loose. Remove the pedestal and set on one side on a protected surface.
Figure 1 Figure 2

6.2 Replacing sides
With the pedestal on its side, loosen (2 or 4, depending on configuration) connector bolts
with a 5mm hex drive or wrench. Remove the side (Figure 3). Make sure the washers stay
on top of the rods.
If this is a two shelf unit, place the new side on the washers and reattach with the connector
bolts. If replacing two sides, flip the unit so the other side is facing up and repeat the
process.
If this unit has drawer(s), remove the drawer slide(s) from the old side by removing the (4)
screws in the slide and attach the slide to the new side with the screws (DO NOT
OVERTIGHTEN). If new drawer slides were ordered, attach the new slides to the new side
(Figure 4). Place the side on the washers and reconnect the connector bolts. Make sure
slide tabs are oriented as shown in Figure 4 (opening up). If replacing two sides, repeat the
process.
Figure 3 Figure 4
6.3 Reattaching the pedestal
Reattach the pedestal by aligning the post holes with the posts from the top (may require
assistance) and holding the pedestal tight to the top. Tighten the (4) cams by turning
clockwise until tight. Add the drawers or shelves.

Section 7: Service Instructions Vanity Tray Replacement
This manual is intended for trained professionals for adjustment of the Medviron Overbed Table.
Any action not outlined in this manual may result in voiding of the warranty.
Tools that may be required
Straight or Slotted screwdriver
#2 Phillips screwdriver
7.0 Removing or replacing a vanity tray
7.1 Removing the vanity tray
Raise the unit to its fullest extension. In most
cases, the vanity tray can be removed by
pulling the tab past the stop. If the stop is too
tight, a slotted screw driver may be used to lightly pry the stop (Figure 1). The vanity can be
replaced the same way it was removed.
Figure 1
7.2 Replacing the vanity tray
If replacing the vanity, the rails may need
adjustment. Remove the old vanity as
described in 7.1. Insert the new vanity.
If the vanity works well and does not slide too
hard or easy, no adjustment is necessary. If
the vanity slides too hard or too easily
adjustment may be required. If the vanity
needs adjustment, start by loosening (3)
screws on the outer rail with the vanity centered (Figure 2). If the vanity moved too easy, hold
the rail slightly closer to the vanity and retighten the screws. Repeat the process with the other

(3) screws on the same rail. If the vanity is too tight, use the same process but move the rail
slightly farther away from the vanity.
Figure 2