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13

  9. Install a new seal housing o-ring on the seal hous-

ing. A lubricant can be used to hold the o-ring on 

the diameter of the seal housing.
Carefully reinstall the seal housing between the 

pump and motor shaft and slide the seal housing 

down the shaft into position. Use caution when 

on the stationary seat is not damaged.  

See step 9 in Figure 5.  

10. Reinstall the 4 hex cap screws, tightening  

the screws evenly and then torquing them  

to the values given in the engineering  

data. See step 10 in Figure 5.

11. Reinstall the coupling pin and locate the  

space shim on the shaft on the seal  

housing. If the shim is not available, a  

5 mm spacer can be used. See step 11 in  

Figure 5.  

12. Reinstall the coupling halves and evenly  

tighten the coupling bolts and torque  

them to the values given in the coupling  

section. Remove the spacer shim and save  

for future use. See step 1 in Figure 5.

13. Rotate the shaft by hand to insure that  

the pump and motor rotate freely.  

Reinstall the coupling guard. 

14. The pump and system should be vented  

prior to starting the pump. See Section 3,  

page 8, for venting procedures.

  1. Complete steps 1-4 as defined above for  

conventional seals.

  2. Loosen the 4 set screws located around the ID of 

the pump shaft.

  3. Remove the cartridge seal using the two tapped 

holes provided on the gland of the cartridge seal 

by threading two of the hex cap screws into these 

holes and evenly tightening these screws. Lift and 

remove the cartridge seal between the pump and 

motor shaft.   

  4. Inspect the pump shaft for any burrs or debris. 

Any burrs should be ground smooth with (fine 

grit) emery paper.

  5. Install a new o-ring on the turned fit of the new 

cartridge seal. Lubricate the o-ring located in the 

ID of the cartridge seal. Use a lubricant compat-

ible with the seal elastomers to hold the o-ring.

  6. Install the new cartridge seal on the pump by care-

fully sliding it between the pump and motor shaft 

and then sliding it into position.

  7. Complete steps 11-14 as defined above for the 

conventional seals.      

  8. After installing the coupling, tighten the four set 

screws located in the collar of the cartridge seal to 

secure the seal to the pump shaft.

  9. Rotate the shaft by hand to insure that the pump 

and motor rotate freely. Reinstall the coupling 

guard. 

10. Use vent connections on cartridge seal for proper 

venting. 

To remove the motor follow steps 1 through 4, as 

provided in the “MECHANICAL SEAL REPLACE-

MENT” section of this manual.
For motor frames 13TC and larger, remove the 4 

motor hex cap screws and the motor adapter. 
Install the motor adapter flange onto the new motor, 

torquing the 4 hex cap screws to the values provided 

in the “ENGINEERING DATA” section of this 

manual.
Complete the reassembly following steps 17 through 

 in the “MECHANICAL SEAL REPLACE-

MENT” section of this manual.
All additional unit service or maintenance, not ad-

dressed in this manual, should be performed at a 

qualified service location. Contact your local dealer 

or G&L Pumps distributor for assistance.

 

See Probable Cause – 1 through 5

 

See Probable Cause – 6 through 1

 

See Probable Cause – 3, 1, 13, 15

 

See Probable Cause – 3, 6 - 8, 10, 1, 13, 16

PROBABLE CAUSE
  1. Motor thermal protector tripped.
  2. Open circuit breaker or blown fuse.
  3. Impellers binding.
  4. Motor improperly wired.
  5. Defective motor.
  6. Pump is not primed, air or gases in liquid.
  7. Discharge, suction plugged or valve closed.
  8. Incorrect rotation (three phase only).
  9. Low voltage or phase loss.
10. Impellers worn or plugged.

Hazardous

voltage