Specifications

Document No. DER05037 GEARBOX REMOVAL & INSTALLATION
Page 6 of 8 Effective Date 28 Mar 08
CLEANING, INSPECTION, AND REPAIR
After removing and disassembling rotating assembly, clean, inspect, and repair as follows:
1. Clean all components with a suitable cleaner/degreasing agent, and blow dry with filtered
compressed air. Remove any corrosion to facilitate inspection.
2. Inspect all parts for scratches, nicks, burrs, or deformation that may affect suitability for
returning to service. Blend out any minor surface defects. Replace components that are
obviously deformed or have serious defects that render them unserviceable.
3. Inspect pillow blocks for corrosion, distortion, nicks, cracks, burrs, fractures, or other defects.
Repair any minor defects, or replace if serious defects or cracks are found.
4. Replace all O-rings, seals and bearings.
5. To prevent contamination, place all cleaned components in clean plastic bags until ready to
assemble.
INSTALLATION
To install the gearbox, proceed as follows:
1. Using a suitable hoist, support the replacement gearbox assembly in a level horizontal
orientation, as previously done in Removal. Tap and clean all holes in gearbox. Remove
protective coatings from all mating surfaces of gearbox.
2. Install new O-ring on gearbox (Figure 5037-8), and lubricate O-ring and shaft with a light coat
of anti-seize compound.
3. Remove M12 screws securing the two plates that were temporarily installed to restrain
conveyor during gearbox removal, and remove plates. Apply Loctite to M12 screws previously
removed from conveyor, and re-install screws.
4. Rotate gearbox shaft until key is aligned with keyway in conveyor.
5. Install nuts and narrow washers on two jack bolts, and insert bolts through clear holes in
gearbox flange 180 degrees apart. Thread bolts into gearbox assembly mounting holes in
bowl assembly.
6. Alternately turn each nut a few revolutions at a time to gradually and evenly draw gearbox into
bowl assembly.
7. When gearbox is fully seated against the bowl, remove jack bolts, and install 20 M16 socket
head screws to secure gearbox. Tighten screws to torque specified in
DER05029.
8. Install four M16 hex head bolts through clear holes in gearbox and into corresponding holes in
bowl, and tighten in accordance with
DER05029.
9. Insert a pry bar into dowel pin hole in gearbox shaft, and carefully align hole to facilitate
insertion of dowel pin.
10. Apply anti-seize compound to dowel pin and pipe plugs. Insert pin through conveyor and
gearbox shaft, and install pipe plugs into threaded holes in conveyor to retain pin.