Filter
Top Products
Upright Portable Hot Oil TCUs Chapter 5: Maintenance 33
Maintaining the Pump
Disassembling the Pump
WARNING! Before opening the pump chamber:
• Make sure that any pressure in the chamber has been completely
vented!
• Make sure that the motor cannot be inadvertently started while you
work on the pump!
Failure to follow these precautions may result in serious injury or death!
1. Mark the head and casing before disassembly to insure proper reassembly. The idler
pin, which is offset in the pump head, must be positioned toward and equal distance
between port connections to allow for proper flow of liquid through the pump.
2. Remove the head from the pump. Do not allow the idler to fall from the idler pin. To
prevent this from happening, tilt the top of the head back when removing. Avoid
damaging the head gasket.
3. Remove the idler and the bushing assembly.
4. Insert a length of hardwood or brass through the port opening between the rotor teeth
to keep the shaft from turning. Bend up the lockwasher tang with a spanner wrench.
Remove the locknut and lockwasher from the shaft.
5. Loosen Allen head setscrews in the face of the thrust bearing assembly. Remove the
thrust bearing assembly by threading out of the bracket.
6. Loosen the radial setscrews in the thrust bearing assembly and remove the end cap
using the spanner wrench.
7. Remove the bearing spacer collars and the ball bearing.
8. Using snap ring pliers, remove snap ring from shaft.
9. Remove two nuts holding seal gland plate and seal gland in place. Slide seal gland
off of the shaft being careful not to damage the lip seal.
10. Using a soft headed hammer, gently tap on the end of the rotor shaft until the rotor
and shaft assembly can be completely removed from the pump. Note the mechanical
seal may stick to the shaft causing initial resistance when the shaft is removed.
11. Remove the mechanical seal parts from the bracket.
12. Clean all parts thoroughly and examine for wear and damage. Check lip seals, ball
bearing, bushings and idler pin and replace if necessary. Check all other parts for
nicks, burrs, excessive wear and replace if necessary.
13. Wash bearings in clean solvent. Blow out bearings with compressed air. Do not allow
bearings to spin; turn them slowly by hand. Spinning bearings will damage race and
balls. Make sure bearings are clean, then lubricate with non-detergent SAE 30 weight
oil and check for roughness. Roughness can be determined by turning outer race by
hand.
14. Casing can be checked for wear or damage while mounted on bracket.