Alemite 7785-MA Manuale di servizio - Pagina 7

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High-Pressure Grease Pump

Overhaul

NOTE: Refer to Figure 2-A and 2-B for

component identification on all overhaul

procedures.

Prior to performing any maintenance procedure, the

following safety precautions must be observed. Personal

injury may occur.

WARNING

Do not use halogenated hydrocarbon

solvents such as methylene chloride or 1,1,1-

trichlorethane in this pump. An explosion can

result when aluminum and/or zinc-plated parts in

the pump come in contact with halogenated

hydrocarbon solvents.

Release all pressure within the system prior to

performing any overhaul procedure.

• Disconnect the air supply line from the

pump motor.

• Into an appropriate container, operate the

control valve to discharge remaining

pressure within the system.

Never point a control valve at any portion of your

body or another person. Accidental discharge of

pressure and/or material can result in injury.

Read each step of the instructions carefully.

Make sure a proper understanding is achieved

before proceeding.

Removal

NOTE: These model pumps are used in

numerous applications and are mounted

accordingly. The following procedures

consider the pump assembly to be

mounted to a container with a cover.

1. Remove the cover and pump assembly from its

container.

2. Remove the four bolts that secure the pump

assembly to the cover.

IMPORTANT: Remove the follower from

the bottom of the container.

Alemite, LLC

1-800-548-1191-http://[email protected]

Disassembly

1. Unscrew Adapter (5) from Air Motor Assembly (2).

2. Remove Washer (8) and rubber Bushing (9).

Separate Pump Tube from Air Motor

3. Clamp the motor housing horizontally in a vise.

4. Loosen Jam Nut (23) that secures the Pump Tube

assembly to the Air Motor Assembly.

CAUTION

Support the Pump Tube assembly during removal.

Damage to components can occur.

5. Unscrew Pump Tube (28) [with attached components]

from the Air Motor.

6. Pull on the Pump Tube to expose Coupling (25).

7. Remove upper Spring Clip (26) that secures Pump Tube

Rod (27) to Coupling (25).

8. Unscrew the Coupling from the air motor piston rod.

• Rotate the entire Pump Tube assembly.

Pump Tube Upper Packing

9. Unscrew Cap Screws (13) that secure Body (12) to the

Air Motor.

• Do not remove the Cap Screws from the Body.

10. Remove the Body from the Air Motor.

• Use the Cap Screws as levers.

11. Position the Body on the bench with the larger diameter

facing upward.

12. Remove aluminum Gasket (21), Washer (22), and

additional Gasket (21) from the Body.

13. Remove Spacer (20), Washer (19), and Seal (18).

14. Remove Lantern Ring (17) with Seal (16), and

Spacer (15).

• Remove the Seal from the Lantern Ring.

15. Remove O-Ring (14), O-ring (10), and O-Ring (11) from

the Body.

Pump Tube

16. Clamp the pump tube assembly at Adapter (43) securely

in a soft-jaw vise.

SER 7785-A5

Revision (11-08)