Motor Maintenance; Lubrication - Greenlee TZ Serie Manuel D'instructions

Motopompe hydraulique

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Maintenance (cont'd)

Purging (Bleeding) Air

When purging air from the system:

• Do not advance the ram more than 3/4 of its stroke.

Overextending the ram will allow hydraulic fluid

to leak out, and the ram may damage the O-rings

when it retracts.

• Do not restrict the ram travel to run the pump up

to full pressure (commonly called dead heading the

pump).

Failure to observe these precautions can result in

injury or property damage.

Erratic performance may indicate air in the hydraulic

system.

1. Remove the ram from the accessory (conduit

bender frame, cable cutter, etc.).

2. If possible, position the pump so that it is located

higher than the ram. This will allow air to travel up

the hydraulic hose to the pump reservoir.

3. Place the ram in a vertical position with the hose

coupler upward.

4. Rotate the control lever counterclockwise (to

MANUAL RELEASE).

5. Start the pump and, using the ram scale as a refer-

ence, advance the ram 3/4 of its stroke. Stop the

pump. Do not overextend the ram!

6. Rotate the control lever clockwise (to AUTO

RELEASE). The ram will retract, forcing any air out

through the hose, into the pump reservoir, and

through the vented plug.

7. Check the oil level of the reservoir. Add oil

if necessary.

Greenlee Tools, Inc.

975 Hydraulic Power Pump

Draining and Flushing the System

Note: Thoroughly clean the pump exterior before

removing the reservoir.

1. Remove the reservoir cover screws.

2. Remove the pump system from the reservoir.

Note: Be careful not to damage the cover gasket,

inlet strainer or relief valve when removing the

pump.

3. Clean the interior of the reservoir and fill with clean

kerosene. Do not use solvents. Rinse the inlet

strainer.

4. Place the pump system into the reservoir and

replace the four cover screws.

5. Connect a hose to the pump as usual. Insert the

other end of the hose into the pump reservoir at fill

hole.

6. Run the pump for several minutes. While the

pump is running, rotate the control lever between

MANUAL RELEASE and AUTO RELEASE several

times. Start and stop the pump several times to

cycle the pilot-operated valve.

7. Remove the hose and remove the pump assembly

from the reservoir. Drain and clean the reservoir inte-

rior. Allow the reservoir to dry. Drain the hose.

8. Reassemble the pump system.

9. Refill reservoir as instructed under the Adding Oil

instructions in this section.