Zenith B Spécifications télécharger pdf (Page 12)

B-9000 Series

Assembly

Use both pages of the assembly draw-

ing during the reassembly process to

assure correct orientation of all parts.

Considerable care should be taken

to prevent wedging or jamming of parts.

Never force the parts together. They will

drop into place if properly aligned.

Note: If the pump will not turn freely

after each component is installed,

then the last piece installed needs

additional attention or replacement.

Provide a can of compatible lubricant,

preferably SAE-50 motor oil or mineral oil.

If the pump is to be used at temperatures

greater than 212°F (100°C), lubricant

should be chosen for high temperature

service. Shaft, arbor, dowels, and gears

should be lubricated prior to assembly.

Take care to remove excess fluid from

between the plate surfaces using a clean

towel. Threads should be lubricated with

a temperature-rated, anti-seize compound.

For service under 212°F (100°C), a moly-

disulfide-based grease may be used.

During assembly, considerable care

should be taken to prevent wedging or

jamming of close-fitting components.

Never force the parts together. They will

drop into place if properly aligned.

Caution: Please review the precautions

listed on Page 4 for Magnetically

Coupled Pumps.

1. Place the front plate (8) on a flat

surface with the inner surface of

the plate facing up.

2. If the arbor (9) was removed, press

arbor into the front plate (8) using

the driven gear (6) as a guide for

pressing the arbor perpendicular

(upright) into the plate.

3. Push the slip-fit dowels (10) into the

dowel holes in the front plate (8).

4. Place the driven gear (6) on the

arbor (9).

5. Place the gear plate (3) over the

dowels (10) and driven gear (6).

On .05 through 2.4cc/rev models,

the gear plate may be installed in

either direction. On models larger

than 2.4cc/rev, align the clearance

hole for the fastener (19) with the

corresponding tapped hole on

the front plate.

6. Install the drive shaft (2) from the

opposite side of the front plate.

7. Install the round key (4) into the

keyway on the drive shaft.

8. Slide the driving gear (5) onto the

drive shaft and into the gear plate.

Take care to align the keyway in the

gear with the key (4). The key may

need to be held down to prevent it

from being damaged by the gear.

9. Install the retaining ring (16) on the

rear plate end of the drive shaft (2).

10. Install the rear plate (7).

11. Install the socket head screws (19)

through the rear plate (7) and torque

to 50% of recommended torque

(see table page 14) using a cross-

ing pattern. Check for free rotation

of the gears. If acceptable, continue

to torque to full recommended

torque. Again, check for free rotation

of the gears.

12. Install the socket head screw (20)

through the rear plate (7) and torque

to recommended value.

13. Install the seal onto the drive shaft (2).

NOTE: To facilitate assembly of the shaft

seal, place the pump on a flat surface

with the shaft in a vertical position.

a) Mechanical Face Seal Pumps:

• The mechanical seal (13) will be

installed onto the drive shaft (2) with

the carbon end facing away from

the front plate (8). Take care when

pressing the seal onto the shaft, as

the elastomer can be damaged by

the keyway or shaft edge.

• On the .05 through 2.4 cc/rev models,

align the set screws with the grooves

machined in the drive shaft (2), then

tighten the set screws. On larger

models, the seal will slide up the

shaft until it rests against the collar.

• On 4.5 cc/rev and larger models,

install the o-ring (15) into the recess

in the seal housing (11). If necessary,

use heavy silicone grease to keep

the o-ring in place.

• On 4.5 cc/rev and larger models,

install the carbon seat into the

mechanical seal with the exposed

rib of the seat toward the ceramic

seat of the seal assembly. The

notches of the carbon seat should

mate with the tabs of the mechani-

cal seal. Use heavy silicone grease

to keep the seat fitted to the

mechanical seal.

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Zenith B Spécifications Page 12

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