Crane Pumps & Systems Pump SE51HTA

Disassemble volute and impeller to expose shaft seal

Examine all seal parts and contact faces for wear and damage

Remove retaining ring, spring, and rotating member from shaft if repair is needed

Remove stationary member by prying out with flat screwdriver if replacing seal

Clean and oil seal cavities in seal plates

Lightly oil outer surface of stationary member

Use a flashlight to inspect the oil in the motor housing

Is the oil light amber in color?

Is the oil free from suspended particles?

Is the oil milky white, indicating the presence of water?

Place pump on its side and remove pipe plug (39) from motor housing (6) to drain oil into a clean, dry container.

Check oil for contamination using an oil tester with a range to 30 Kilovolts breakdown.

Is the oil clean and uncontaminated?

Refill the motor housing as per section F-1.4.

Inspect for leaks at the following locations before refilling with oil

Perform a pressure test as per section F-1.3 to locate the leak.

Drain oil from motor as outlined in paragraph F-1.1

Disassemble volute and impeller as outlined in paragraph F-2.1

Disassemble shaft seal as outlined in paragraph F-3.1

Position unit upright using blocks to avoid resting unit on shaft

Unscrew cable hex bolts and remove compression flange and power cord

Remove snap ring with a flat head screwdriver

Pull the terminal block out of the housing using a T-bolt or pair of pliers and a .25-20 screw

Leave slack on the motor leads connected underneath

Set unit on its side with plug (44) upward

Enter the amount of new oil to refill as per Table 1

Apply pipe thread compound to threads of pipe plug (44)

Assemble pipe plug (44) to outer seal plate (29)