6 Maintenance
20
Read the instructions carefully. The items refer to the parts list and service kits section.
6.4 Inspection and Service of Components
Drawing 5
Inlet Collar and Stator
Inspect the vanes of the Stator (pos. 3) inside the Inlet Collar (pos. 1) to be sure that they are clear of debris.
If closer inspection of the Stator is required, use duckbill pliers to remove the Stator Retaining Ring (pos. 2) from the Inlet Collar.
Warning: Use caution when installing and removing the Stator Retaining Ring (pos. 2), as it is an
exceedingly stiff spring part. If improperly gripped, the Ring may slip out of the pliers and
cause serious personal injury. Safety glasses are strongly recommended during the removal
and installation of this part.
Drawing 6
Planetary Gear Train Assembly
Pull apart the Input Shaft Housing Assembly (Drawings 8-12), the Gear Box Assembly (Drawings 14-17), and the Output
Housing Assembly (Drawing 13).
Drawing 7
Stem Assembly
Carefully remove the remaining Labyrinth Bearing (pos. 25) and the Tee Housing Bevel Gear (pos. 22) from the central shaft
of the Stem (pos. 15.1). Insert a slotted screwdriver into the pin slot in the Bevel Gear for leverage if needed. Inspect the Bevel
Gear for worn, sharp, or damaged teeth.
Caution: DO NOT force the screwdriver in under the Tee Housing Bevel Gear (pos. 22). The Clutch O-
Ring (pos. 23) is directly underneath and will be damaged.
Inspect the Clutch O-Ring (pos. 23) for deterioration or damage. Remove only if replacement is necessary.
Caution: To reduce the likelihood of scratching any sealing surface, use a pick made from brass to
remove o-rings.
Inspect the Output Shaft Lower Bearing (pos. 26) seated in the central shaft of the Stem (pos. 15.1) for excessive wear on its
inside diameter. Remove only if replacement is necessary.
If the unit is a pin drive machine, there will be a Bevel Gear Location Pin (pos. 15.2) in the corresponding hole in the Stem. If
the unit is a clutch machine, the pin hole will be empty.
Note: If you are unsure whether the unit is intended to be a pin or clutch drive, contact Alfa Laval for
assistance.
Drawing 8
Input Shaft Housing Assembly
Remove the Rotor Nut (pos. 4) and Lock Washer (pos. 5) from the top of the Input Pinion Shaft Assembly (Drawing 12) using
a 7/16” socket wrench.
Caution: Gently hold the Input Pinion (pos. 6.3) while loosening the Rotor Nut (pos. 4), but DO NOT
clamp down. Doing so may damage the gear teeth.
Remove the Rotor Assembly (Drawing 9) and the Input Shaft Housing Assemblies (Drawings 10-11) from the Rotor Shaft
Assembly (Drawing 12).
Unthread the Seal Housing Assembly (Drawing 11) from the Bearing Housing Assembly (Drawing 10).
Caution: The Input Shaft Housings (Drawings 10 and 11) have left-hand threads. Take care when
separating the parts.