Steris Amsco 3085 SP Maintenance Manual Download Page 103

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6-4

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6.8 TABLETOP RAISE/LOWER

1. Lower table to minimum elevation. Check distance

from floor to leveled back top surface (without pad).
See

Table 6-1

2. Raise table to maximum elevation. Check distance

from floor to leveled back top surface (without pad).
See

Table 6-1

3. With table at maximum elevation, check limit switch

LS5. Switch should be made (roller engages “V” slot)
at 1/16 ±1/32" (1.6 ±0.8 mm) before table reaches
maximum mechanical stop. If necessary, loosen
switch mounting bracket screws and reposition
switch to meet this requirement. Repeat

Step 2

NOTE: The following test is to check tabletop "lash,"
which falls into three categories: longitudinal, lateral and
rotational. It is normal for the tabletop to have a certain
amount of lash and adjustments should be made only
when the lash exceeds the amount specified.

4. Engage floor locks, level tabletop and raise table to

maximum elevation. Measure tabletop lash* as
follows (see Figure 6-2):

Longitudinal Lash and Rigidity:

Hang or

apply 50 lb (23 kg) of force on end of headrest
on table centerline. Measure amount of vertical
movement at outboard end of left back-section
siderail when 50 lb (23 kg) weight is moved to
end of leg section on table centerline.
Measurement shall not exceed 1/4" (6 mm).

Lateral Lash and Rigidity:

Hang or apply 50 lb

(23 kg) of force on left siderail at the seat/back
joint. Measure amount of vertical movement at
outboard end of left back section when the 50 lb
(23 kg) weight is moved to right side.
Measurement shall not exceed 3/32" (2.4 mm).

Rotational Lash and Rigidity:

Push in

horizontal plane with 50 lb (23 kg) applied (or
50 lb force exerted) at right angles to outboard
end of right leg-section siderail. Measure
amount of movement at outboard end of left
backsection siderail when 50 lb (23 kg) is
removed and a push of 50 lb (23 kg) is applied
to outboard end of right back-section siderail.
Measurement shall not exceed 3/16" (4.8 mm).

NOTE: If it is determined that the tabletop has
excessive lash, check to ensure the lash is from
the column being out of adjustment. With the
column and base shrouds removed, apply an
alternating load to the tabletop as outlined
above while observing the column for motion
between its upper and lower sections. If the lash
is from the column, it should be adjusted as
outlined in

Step 5

* Lash is the clearance or "play" between adjacent movable

mechanical parts.

Figure 6-2. Tabletop Lash

5. Position tabletop to minimize the load on column.

Attach headrest to back section. Actuate leg section
to its full up position. Level seat section, back section
and headrest. Refer to

, for information on lash adjustment.

Important:

Do not remove all the column lash, which

would inadvertently make the column too tight, creating
excessive loads on the bearings and producing premature
bearing failure. Removal of all column lash could also
produce a sticking condition on the column so that it will
not lower after remaining at one height for a period of
time.

6.9 TABLETOP TILT

Check tabletop tilt as follows:

1. Articulate tabletop in full lateral LEFT TILT and

then full lateral RIGHT TILT. Tilt as referenced to
column stage block should be 18 ±1°.

2. The maximum right and left tilts must be within 2°

of each other. Calculate difference by subtracting

Longitudinal Lash

Lateral Lash

Rotational Lash