Steris Amsco 3085 SP Maintenance Manual Download Page 121

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7-16

764332-898

If seat section drift still exists after replacing

spring, replace ball check valve.

NOTE: All Bieri 3 manifolds currently shipping for
Service parts are equipped with the stiffer spring.

7.18.4 S11 and S12

NOTE: Refer to Figure 24 located in Illustrated Parts
Breakdown (refer to Tab).

1. Remove front base shroud as described in

2. Remove front battery (closest to counterweight) as

described in

3. Remove jam nuts (19 mm) from both solenoids (S11

and S12).

4. Slide coil off of both left and right sides of manifold

assembly.

5. Loosen each solenoid housing using deep socket

(24 mm). With a lint-free cloth under each housing
to catch any leakage, unthread each housing by
hand and remove from valve manifold.

6. Wipe up spillage.

7. Remove solenoid stem on control board side by

sliding stem off of valve slide.

8. Remove washer and pressure spring.

9. Remove solenoid stem and slide by pulling right

stem out of manifold block.

10. Inspect plunger for wear and replace as necessary.

11. To replace valve, reverse this procedure.

7.18.5 S13

NOTE: Refer to Figure 24 located in Illustrated Parts
Breakdown (refer to Tab).

1. Remove front base shroud as described in

2. Remove jam nut (19 mm).

3. Remove and replace cartridge assembly using 24-

mm wrench.

4. Reinstall in reverse order.

7.19 REPLACEMENT OF CHECK VALVES

IN FITTINGS

NOTE: Hold a lint-free cloth under fittings when loosening
and removing. Always replace sealing washers.

Before beginning any of the following fitting
procedures, perform the following steps:

1. Remove front base shroud as described in

2. Raise table to maximum height.

3. Support raise/lower mechanism by inserting a

screwdriver through access hole on back of column.
Slowly lower table until it contacts screwdriver.

NOTE: Refer to Figure 23 located in Illustrated Parts
Breakdown (refer to Tab).

4. Identify appropriate check valve to be replaced.

5. Secure top section requiring check valve

replacement to:

Keep section from falling when hydraulic line
is opened.

To minimize fluid loss.

Reduce changing time.

6. Loosen and remove banjo fitting bolt using 14-mm

wrench. Note position of banjo fittings seals.

7. Remove check valve cartridge from manifold using

17-mm wrench.

8. Remove check valve spring and ball.

9. Replace and reassemble in reverse order.

7.20 PC BOARD REPLACEMENT

NOTE: The numbers in parentheses () refer to items found
on Figure 4 located in Illustrated Parts Breakdown (refer to
Tab) unless otherwise noted.

7.20.1 Table Control PC Board Assembly

1. Lower table to lowest position.
2. Lower shroud as described in

3. Raise table to maximum height and full left-side tilt

to gain access to top screw (16) holding PC Board
Assembly (18) in place.

4. Unplug cable plugs from bottom of PC Board

Assembly.

5. Remove cable ties from side and bottom of PC Board

Assembly.

NOTE: Washers (17, 20 and 19) are installed in sequence.
Before removing screws holding PC Board Assembly in
place, note sequence and reinstall in same manner.

6. Remove top screw (16), wire shield (21) and washers

(17, 20 and 19) holding PC board to column.

CAUTION – POSSIBLE EQUIPMENT
DAMAGE: Failure to secure a tabletop
section may result in sudden lowering of
that section when hydraulic line is opened.