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PM-000150-C Kopenn Auger Drive Service and Repair Manual - March 2018
UNIT REASSEMBLY
1. Start with output housing assembly. Turn case upside down and position on table. Bottom seal end should be facing upward and install bearing
cup with appropriate tooling.
2. Install bottom seal or dual seals applying a smear of Loctite 243 thread locker to outside of seal and fit using appropriate tooling. Ensure dual
seals oppose each other. Ensure seal is flush with the housing. Wipe off excess Loctite. Grease inner face of seal with EP grease.
3. Invert outer housing to upright position and place over securely positioned output shaft with splines facing upward. Using the appropriate
tooling, assemble the output housing onto the output shaft.
4. Install bearing race to output housing with appropriate tooling. Install bearing ensuring correct installation technique. Only drive the bearing
home via the inner cone of bearing. Hitting outer roller cage will damage the bearing.
5. While holding output shaft with one hand, rotate case to be certain it turns freely and smoothly. The slight resistance felt, if any, is due to shaft
seal load (drag) on output shaft.
6. Fit lock nut with chamfer facing downward and tension.
PD12HD-21 – 180ft/lbs (approx) PD22 – 20 nut tension – 1000ft/lbs (approx)
TK25-20 – PD50-20 nut tension – 1200ft/lbs (approx) Refer to
(“Bearing Preload Chart P.12” for correct lock nut tension.)
7. Drive locking tab into the keyway of the output shaft.
8. Insert key after tensioning locking nut.
9. Clean and ensure inner section of housing and bearings are free from foreign matter.
10. For PD12HD-21 – PD22-20. Lightly grease a new o-ring and install it into o-ring groove in case. For TK25-20 and PD50-20, use gasket sealant
sparingly on mating surfaces.
11. Fit gear set and sun gear to the output housing. Line up bolt holes and fit ring gear. Make sure the ring gear sits flat on the
housing. Top up gear oil level to top of gear set.
12. Grease o-ring and fit to interim housing and fit interim housing to gear set lining up scribe mark.
NOTE:
IF THE BEARINGS HAVE BEEN REPLACED, IT IS LIKELY THAT A NEW KEYWAY WILL HAVE TO BE CUT IN THE LOCKNUT.
NOTE:
BE CERTAIN THAT THE O-RING STAYS SEATED IN GROOVE DURING STEP DURING ALL ASSEMBLY STAGES.
