Zenith B Spécifications télécharger pdf (Page 7)

7

BPB Series

Disassembly

Refer to Diagram 1 on Page 10 (general

reference only).

Note: As parts are disassembled, place

them carefully on a clean surface such

as a soft cloth. Do not allow them to

knock together.

1) Remove Outer Drive Gear (18) by first

removing Drive Strap Screws (28) and

Drive Strap (20). Slide Yoke Retainer

(19) out of slot in Hub (12).

2) Pull Outer Drive Shaft (11) out of

Hub (12).

3a) LIP SEAL DESIGN. Place pump in a

soft-jawed vise with the Hub (12)

facing upward. Never clamp on

lapped surfaces. Remove three #10-

24 Hub Screws (27) and Hub (12).

Note: We strongly advise removing

the Lip Seal (14) from the Hub (12)

and discarding it.

3b) METAL SEAL DESIGN. Place pump

in a soft-jawed vise with the Hub (12)

facing upward. Never clamp on

lapped surfaces. Upon removal of

the three #10-24 Hub Screws (27),

the Hub (12), Coupling Housing (13),

Anchor Washer (15) and Universal

Seal Coupling (14) are all easily

removed. Remove and carefully

store the Compression Spring (16).

4) Turn the pump over and clamp the

vise onto the Front Side Plate (1).

Remove two of the diagonally opposed

#12-24 Binder Screws (21). Loosen

the other two screws but leave them

engaged by two or three threads.

5) Separate the Front Side Plate (1) and

Rear Side Plate (3) by gently tapping

the slightly engaged Binder Screws

(21) with a plastic hammer.

6) Lift off the Rear Side Plate (3), Center

Plate (2) and Spacer (9).

Caution: Do not allow the metering gears

to be lifted out with the Center Plate (2).

They may drop, causing damage to the

gear teeth. On Metal Seal Design

pumps, be careful to retain Ball (29).

7) Remove Driving Metering Gear As-

sembly (6) by gently turning and lifting.

Repeat for Driven Metering Gear (7).

Never use pliers to lift gears. Never

use a screwdriver to pry gear upward.

If there is a film of oil or other tena-

cious fluid between the gear and the

side plate, it helps to immerse the

parts in solvent. On Metal Seal Design

pumps, Driving Metering Gear (6) and

Drive Shaft (4) are not a press fit

assembly.

8) Remove Port Seal Screws (23 & 25)

and Gaskets (22 & 24). Repeat for

Shaft Seal Screw (31) and Gasket (30).

9) If the Arbor (5) is to be replaced or

thoroughly checked, press out by

using an arbor tool, pressing towards

the inside of the pump (the shortest

press direction). Repeat for Dowels (10).

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