Aquastorm Pump Seal Kit Replacement Procedures

Below are the written procedures on how to replace the type 21 motor shaft seals in the G&L 8 SH (S group) and the 24 SH (M group) pumps used on all Aquastorm machines. Also, a video of the procedure has been created to help guide you through these procedures.  Here is a YouTube Link to the video. https://youtu.be/MmRel0XA1Ng

            Repair Procedure for G&L SSH Pumps With Type 21 Seal

Contents

Pump Disassembly / Pump Seal Removal / Pump Preparation / Pump Disassembly / Pump Seal Removal / Pump Preparation / Pump Assembly / Group M  Assembly (Shaft Sleeve Diameter 1.625") / Group S Assembly (Shaft Sleeve Diameter 1.25") / Figure 1: Spring retainer Location for Type 21 Seals / Figure 2: Exploded Parts List

Pump Disassembly

1. Close all necessary suction and discharge valves. 
2. Drain system, flush if necessary. 
3. Drain the remaining liquid from the pump casing by removing the lower drain plug 
4. Remove suction and discharge flange bolts. 
5. Remove pump from system and set pump  up vertically on end  of  motor to allow easy access to the pump casing.
6. Remove the eight (8) casing bolts using a 5/16" hex Allen Wrench (4 SH), 9/16" Wrench (8 SH), or a 3/4" Wrench (24 SH) depending on the pump head size.  
7. Tap casing discharge flange with a rubber mallet to dislodge it from the assembly 
8. Remove impeller bolt using a 9/16" socket.  NOTE: Bolt Tightens in clockwise direction, Loosens in counter-clockwise direction. It may be necessary to use a strap wrench to hold the impeller during this procedure.
9. Remove Impeller washer. 
10. Use wheel puller or two pry bars (180°apart) between the impeller and seal housing to remove the impeller from keyed motor shaft.

 Pump Seal Removal

1. Remove the shaft sleeve, which will include the shaft sleeve rotating assembly as one unit. This can be done by hand using a twisting motion
2. Pull the rotating portion of the seal up off of the shaft sleeve using a twisting motion. 
3. Remove the stainless steel housing with the stationary portion of the mechanical seal still pressed in the bore.
4. Set the housing concave side down on flat surface and press out stationary seat using a blunt tool.

Pump Preparation

1. All pump components should be cleaned and deburred before assembly. 
2. Inspect shaft sleeve surface finish. NOTE: Shaft sleeve surface must be clean and free of any burrs. If the sleeve has any burrs, ridges, or discoloration replace sleeve. Failure to replace sleeve will result in seal failure.
3. Impeller should be inspected for any major damage and burrs. If excessive replace impeller. 
4. Remove old casing 0-ring from housing, Impeller 0-ring from front of impeller, and sleeve 0-ring from groove in sleeve. Clean surfaces of any debris left behind.

Pump Assembly

NOTE: Be sure to follow correct assembly procedure for either M or S group pumps.

Group M Assembly {Shaft Sleeve Diameter 1.625")

Inspection:

1. Open and unwrap new mechanical seal for inspection the seal assembly is made up of four (4) pieces:
   1. "Stationary seat" - gray silicon carbide face and 0-ring seal. 
   2. "Rotating head" - gray silicon face in stainless steel case. 
   3. "Stainless steel spring"
   4. "Stainless steel spring retainer" - Cup Shaped washer.

Installation:

1. Apply water soluble soap to lubricate the seal stationary seat 0-ring. 
2. Place seal housing on flat work surface, concave side facing up. CAUTION: DO NOT use petroleum  based products to lubricate seal. 
3. Place seal housing on flat work surface, place seal into housing bore. Cover the face with a thin piece of paper towel or cardboard separator from packaging and press seat by hand firmly into bore.
4. Confirm that seat has been pressed evenly into the bottom of the bore by viewing the piece from the bottom of the seal housing. Repress if required. 
5. With a soft lint free cloth wipe the face clean of any debris using denatured alcohol. 
6. Place seal housing concave side up over the motor shaft and lower onto motor adapter. CAUTION: Stationary seat is brittle and can be damaged if it strikes the motor shaft. 
7. Lubricate the shaft sleeve and inside diameter of the seal rotating head with water soluble soap. CAUTION: DO NOT use petroleum based products to lubricate seal. 
8. Place the shaft sleeve, flange side down, on a flat surface. Place a small amount of Anti-seize on the inside shaft seal. Install the spring on the sleeve. Slide the rotating head down on the sleeve with the gray silicon carbide face pointing up. NOTE: See illustration for reference on Spring Retainer placement. 
9. Now slide the shaft over the motor shaft mating the seal faces. 
10. Place the seal spring retainer over the impeller hub.
11. Install the appropriate 0-ring into the sleeve and impeller. 
12. Place key into shaft keyway and slide the impeller into place. 
13. Install the appropriate casing 0-ring over seal housing. NOTE: When in place, the motor shaft should be approx. 1/16" below the impeller hub. 
14. Put a small amount of Loctite on impeller bolt. Be sure not to allow Loctite to contact any other surface.
15. Hold the impeller in place while tightening the impeller bolt. 
16. Torque impeller bolt to 38ft-lbs. 
17. Check casing mating face and make sure casing is free of debris. 
18. Place casing over impeller assembly so that the discharge flange is in the top vertical position. 
19. Apply a small amount of Anti-seize to the eight (8) casing bolts. 
20. Snug bolts down around casing using an across pattern. 
21. Torque Casing Bolts to 40 ft.-lbs. 
22. Using a socket on impeller bolt, spin pump in the direction of rotation to assure there is no internal rubbing or interference. If rubbing is apparent, loosen casing bolts and proceed with tighten sequence again. If no rubbing exists, the assembly process is complete
23. Assembly is Complete. Pump is ready to be put back into service

Group S Assembly {Shaft Sleeve Diameter 1.25")

Inspection:

1. Open and unwrap new mechanical sea for inspection the seal assembly is made up of four (4) pieces:
   1. "Stationary seat" - gray silicon carbide face and 0-ring seal.
   2. "Rotating head" - gray silicon face in stainless steel case.
   3. "Stainless steel spring"
   4. "Stainless steel spring retainer" - Cup Shaped washer.

Installation:

1. Apply water soluble soap to lubricate the seal stationary seat 0-ring. 
2. Place seal housing on flat work surface, concave side facing up. CAUTION: DO NOT use petroleum based products to lubricate seal. 
3. Place seal housing on flat work surface, place seal into housing bore. Cover the face with a thin piece of paper towel or cardboard separator from packaging and press seat by hand firmly into bore.
4. Confirm that seat has been pressed evenly into the bottom of the bore by viewing the piece from the bottom of the seal housing. Repress if required. 
5. With a soft lint free cloth wipe the face clean of any debris. 
6. Place seal housing concave side up over the motor shaft and lower onto motor adapter CAUTION: Stationary seat is brittle and can be damaged if it strikes the motor shaft.
7. Lubricate the shaft sleeve and inside diameter of the seal rotating head with water soluble soap. CAUTION: DO NOT use petroleum based products to lubricate seal.
8. Place the shaft sleeve, flange side down, on a flat surface. 
9. Install the spring retainer, and then the spring on the sleeve. 
10. Slide the rotating assembly down on the sleeve with the gray silicon carbide face pointing up NOTE: See illustration for reference on Spring Retainer placement.
11. Now slide the shaft sleeve assembly over the motor shaft mating the seal faces. 
12. Install the appropriate 0-ring into the sleeve and impeller. NOTE: the shaft sleeve 0-ring #26 and impeller washer 0-ring #25 are different size diameters. Be sure that the larger of the two is used in the shaft sleeve, and the smaller is used in the impeller.
13. Place key into shaft keyway and slide the impeller into place. 
14. Install the appropriate casing 0-ring over seal housing. NOTE: When in place, the motor shaft should be approx. 1/16" below the impeller hub. 
15. Put a small amount of Loctite on impeller bolt do not allow Loctite to get on any other surfaces. 
16. Hold the impeller in place while tightening the impeller bolt. 
17. Torque impeller bolt to 17ft-lbs. 
18. Check casing mating face and make sure casing is free of debris. 
19. Place casing over impeller assembly so that the discharge flange is on the top vertical position. 
20. Apply a small amount of Anti-seize to the eight (8) casing bolts. 
21. Snug bolts down around casing using an across pattern. 
22. Torque Casing Bolts to 40 ft.-lbs. 
23. Using a socket on impeller bolt, spin pump in the direction of rotation to assure there is no internal rubbing or interference. If rubbing is apparent, loosen casing bolts and proceed with tighten sequence again. If no rubbing exists, the assembly process is complete.