ITT SSH-C, SSH-F manual Maintenance, Disassembly, Reassembly

8. Maintenance

	FAILURE TO DISCONNECT AND
WARNING
	LOCKOUT ELECTRICAL POWER
Hazardous
	BEFORE ATTEMPTING ANY
voltage
	MAINTENANCE CAN CAUSE
	SHOCK, BURNS OR DEATH.

1.Bearings are located in and are part of the motor. For lubrication procedure, refer to manufacturer’s instruc- tions.

2.On frame-mounted units, regrease at 2,000 hours use or after 3 months. Use #2 Sodium or Lithium grease and fill until grease comes out of the relief fitting.

9.Disassembly

1.Always turn power off.

2.Drain system. Flush if necessary.

3.Remove motor hold-down bolts on close-coupled or disconnect coupling and remove spacer.

4.Remove casing bolts and pump hold-down bolts.

5.Remove motor and rotating element from casing.

6.Unscrew impeller bolt with a socket wrench. Do not insert screwdriver between impeller vanes to prevent rotation. It may be necessary to use a strap wrench around the impeller if impacting the socket wrench will not loosen the impeller bolt.

7.Remove impeller o-ring.

8.Insert two pry bars (180º apart) between impeller and seal housing. Pry off impeller.

9.Remove shaft sleeve, seal spring, cupwasher, seal rotary and impeller key.

10.Remove seal housing.

11.Place seal housing on flat surface. Press out stationary seal parts.

12.Remove deflector from shaft on frame-mounted units.

13.Remove bolts holding bearing cover to frame and remove bearing cover (frame-mount).

14.Remove lip seals from bearing frame and bearing cover (frame-mount).

15.Remove shaft and bearings from frame (frame- mount).

16.Remove bearing retaining ring (frame-mount).

17.Use bearing puller or arbor press to remove ball bearings (frame-mount).

18.Remove wear ring if excessively worn. Use pry bar and/or vicegrips.

10.Reassembly

1.All parts should be cleaned before assembly.

2.Refer to parts list to identify required replacement items.

3.Reassembly is the reverse of the disassembly proce- dure.

4.Replace lip seals if worn or damaged (frame-mount only).

5.Replace ball bearings if loose, rough or noisy when rotated (frame-mount only).

6.Check shaft for maximum runout of .005" TIR. Bear- ing seats and lip seal areas must be smooth and free of scratches or grooves. Replace if necessary (frame- mount only).

7.All mechanical seal components must be in good condition or leakage may result. Replacement of complete seal assembly, whenever seal has been removed, is good standard practice.

8.If wear ring is being replaced, do not use lubricants on the metal-to-metal fit when pressing in the replace- ment.

9.If the impeller is removed, as for example to effect a mechanical seal change, this procedure must be followed: Old impeller bolt and impeller o-ring cannot be reused.

10.Install the mechanical seal stationary seat in the seal housing, using soapy water as a lubricant to ease insertion.

11.S-Group – Install the mechanical seal spring retainer, spring and rotary assembly on the shaft sleeve using soapy water to lubricate. Slide the shaft sleeve over the pump shaft, be sure that a new shaft sleeve o-ring is used.

NOTE: The shaft sleeve o-ring and impel- ler washer o-ring are almost identical in diameter. be sure to use the square cross-section o-ring in the impeller washer. the round cross-section o-ring is used in the shaft sleeve.

11. M-Group – Install the mechanical seal spring and rotary on the shaft sleeve using soapy water to lubri- cate. Slide the shaft sleeve over the pump shaft. Be sure that a new shaft sleeve o-ring is used. Place the mechanical seal spring retainer over the impeller hub.

12.Place the impeller key into the shaft keyway and slide the impeller in place. Install the impeller stud and impeller washer. Be sure that a new impeller o-ring is used. Tighten S-Group (3⁄8" thread) to 17 lb.ft. and M-Group (½" thread) to 38 lb.ft.

13.Replace casing bolts and tighten in a crossing se- quence to the torque values indicated below. S-Group – 25 lb.-ft. (35 N-m)

M-Group – 37 lb.-ft. (50 N-m)

14.Check reassembled unit for binding by rotating shaft with appropriate tool from motor end.

15.If rubbing exists, loosen casing bolts and proceed with tightening sequence again.