Product Manual A

Maintenance

31609 A MTP4000-6000DZV/DZD Operating Manual 53

JACK MAINTENANCE

The following procedures should be performed at least annually.

Side-wind Models

• The internal gearing and bushings of the jack must be kept lubricated. Apply a small amount of automotive

grease to the internal gearing by removing the jack cover, or if equipped, use a needle nose applicator or

standard grease gun on the lubrication point found on the side of the jack near the crank. Rotate the jack

handle to distribute the grease evenly.

• A lightweight oil must be applied to the handle unit at both sides of the tube.

• If equipped, the axle bolt and nut assembly of the caster wheel must also be lubricated with the same

lightweight oil.

Top-wind Models

• Apply a lightweight oil to the screw stem.

Figure 20 - Lubrication Points

RUN-DRY SEAL MAINTENANCE

The mechanical seal oil level should be maintained to the top line of the reservoir; however, oil will circulate as long

as the oil level is above line of the reservoir. Refer to the “Basic Maintenance Schedule” on page 50 for recommended

mechanical seal oil change interval.

Mechanical seal oil can be added either during pump operation or while shut down. If water begins to accumulate

in the reservoir, or the oil level depletes rapidly, this may indicate mechanical seal failure. Leakage of oil from the

gland would indicate a damaged or worn lip seal. Refer to “Run-dry Seal” on page 45 for oil recommendations.

Wear Rings

Wear rings are vital for successful pump operation. They reduce the pressure at the stuffing box and they reduce

axial thrust loads. Wear rings should be replaced if the clearance has increased to about .03 in. (.76 mm) per side.

SERVICING THE PUMP

Pump Disassembly

1. Remove all capscrews from the volute. Insert two of the capscrews into the tapped holes in the backplate.

Make sure the volute doesn’t fall onto the impeller.

Oil

Grease

Oil

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