5 Operation
13
Pay attention to possible faults. Read the instructions carefully.
5.2 Troubleshooting
Refer to Sections 6.3 (General Dismantling) and 6.4 (Inspection and Service of Components) for instructions on disassembly,
examination of the part(s), and the location of the part(s) within the machine.
Potential Causes:
Insufficient Flow
Each Alfa Laval GJ 18 is configured to meet certain operating conditions outlined at the time of the initial sale, such as flow
rate (GPM or m3/h), pressure (PSI or bar), temperature (
℉
or
℃
), chemical content of the wash fluid, cycle time, etc. If the
Nozzles (pos. 36) are too small or the Stator (pos. 3) is not sized correctly, the Tee Housing (pos. 24.1) may not turn.
Look for restrictions in the fluid supply such as a clogged filter, kinked hose, or deposits in the piping.
Tight Clearances
A recently overhauled Alfa Laval GJ 18 may fail to operate when first returned to service. If the machine seems otherwise fine,
try running it with at least one Nozzle (pos. 36) removed. The reduction in pressure and additional flow should be enough to
overcome the extra resistance of any new Bearings and Seals. Twenty minutes of operation should loosen the machine to run
normally with the Nozzles reinstalled.
Clogged Unit
Loosen the Inlet Collar Screws (pos. 13) and remove the Inlet Collar (pos. 1). Look inside the Inlet Collar and remove any debris
caught in the Stator (pos. 3). Check for debris in the vanes of the Rotor as well (pos. 7.1). Remove any material wound around
the Rotor Shaft (pos. 6.1). In addition, check for any debris caught in the outlet holes of the Stem (pos. 15.1), the nose of the
Tee Housing (pos. 24.1), the Nozzle Carrier (pos. 33.1), and the Nozzles (pos. 36).
Does Rotor (pos.
7.1) turn freely by
hand?
- Damaged Planetary Gear Train (Drawing 6)
Do Nozzle (pos. 36)
and Tee Housing
(pos. 24.1) both
index when Rotor
(pos. 7.1) is turned?
- Cracked/Loose Input Pinion (pos. 6.3)
- Damaged Planetary Gearhead (pos. 16)
- Worn Tee or Nozzle Housing Bearing (pos. 25)
-
Loose Tee or Nozzle Housing Cup (pos. 24.2, pos. 32)
Does only Tee
Housing (pos. 24.1)
index?
- Worn Tee Housing Bevel Gear (pos. 22) or Nozzle Housing Bevel Gear (pos. 31)
- Broken Stem Gear Location/Drive Pin (pos. 15.2)
No
No
No
Yes
Yes
Yes
- Cracked/Loose Input Pinion (pos. 6.3)
- Damaged Planetary Gearhead (pos. 16)