Crane Pumps & Systems Pump SE51A

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

Remove hex bolts and lockwashers

Lift motor and seal plate assembly from volute

Clean out volute body if necessary

Clean and examine impeller for pitting or wear

Inspect gasket and replace if cut or damaged

Replace impeller using screwdriver to hold shaft stationary

Disassemble volute and impeller to expose shaft seal

Examine all seal parts and especially contact faces for signs of wear

Is there any uneven wear pattern, chips, or scratches on seal faces?

Is the entire shaft seal (28) being replaced?

Remove stationary (28a) by prying out with flat screwdriver if replacing seal

Clean and oil seal cavities in seal plates (5, 29)

Lightly oil outer surface of stationary member (28a)

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 level just above the motor when pump is in vertical position?

Set unit on its side with plug (44) upward

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

Refill with new oil as per Table 1

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

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