6 Maintenance
21
Read the instructions carefully. The items refer to the parts list and service kits section.
Drawing 9
Rotor Assembly
Inspect the Rotor Shaft Central Bearing (pos. 7.2) that is installed in the Rotor (pos. 7.1) for chips, cracks, or excessive wear.
The Bearing should protrude slightly from the bottom face of the Rotor.
Drawing 10
Input Shaft Bearing Housing Assembly
Inspect the Rotor Shaft Central Bearing (pos. 8.2) that is installed in the top of the Input Shaft Bearing Housing (pos. 8.1) for
chips, cracks, or excessive wear. The Bearing should protrude slightly from the top face of the Housing.
Ensure that the upper Gear Box Pin (pos. 8.3) is firmly pressed into the bottom of the Housing.
Drawing 11
Input Shaft Seal Housing Assembly
Inspect the Rotor Shaft Central Bearing (pos. 9.2) that is installed in the bottom of the Input Shaft Seal Housing (pos. 9.1) for
chips, cracks, or excessive wear. The Bearing should be slightly recessed into the Housing.
Remove the Input Seal Retaining Ring (pos. 10) from the Housing.
Inspect the back-to-back Input Shaft Seals (pos. 11) for loss of spring tension, indicated by excessive dry deposits of dirty or
abrasive cleaning solution on the spring. If the Seals require replacement, remove them from the Housing.
Inspect the Gear Box O-Ring (pos. 12) around the Housing for deterioration or damage.
Caution: To reduce the likelihood of scratching any sealing surface, use a pick made from brass to
remove o-rings and seals. Inspect the o-rings for deterioration or damage. Inspect the seals
for loss of spring tension (indicated by excessive dry deposits of dirty or abrasive cleaning
solution on the spring). Replace as required.
Drawing 12
Input Pinion Shaft Assembly
Inspect the Input Pinion (pos. 6.3) for hairline cracks on the end face and worn, damaged, or sharp/pointed teeth.
The Pinion should be tight on the Rotor Shaft (pos. 6.1) and flush against the Rotor Shaft Carbide Thrust Washer (pos. 6.2).
The Thrust Washer should not be able to spin on the Rotor Shaft.
If the Input Pinion has slipped, press it back onto the Rotor Shaft, or replace it if it is cracked or worn.
Inspect the Rotor Shaft for signs of scoring and wear, particularly along the regions with plasma coating. Replace the Rotor
Shaft if any of the coating is chipped or cracked.
Drawing 13
Output Shaft Housing Assembly
Push the Transition Output Shaft (pos. 21) up and out of the Output Shaft Bearing Housing (pos. 17.1).
Remove the Output Seal Retaining Ring (pos. 20) from the Housing.
Inspect the Output Shaft Seals (pos. 19) for loss of spring tension, indicated by excessive dry deposits of dirty or abrasive
cleaning solution on the spring. Remove them from the Housing for replacement if necessary.
Inspect the Gear Box O-Ring (pos. 12) around the Housing for deterioration or damage. Remove and replace if necessary.
Caution: To reduce the likelihood of scratching any sealing surface, use a pick made from brass to
remove o-rings and seals.
Inspect the Output Shaft Upper Bearing (pos. 18) inside the Housing for excessive wear on the inner diameter and on the upper
surface that the flange of the Transition Output Shaft contacts. Remove and replace if necessary.
Ensure that the lower Gear Box Pin (pos. 17.2) is firmly pressed into the hole in the top of the Housing.