PLATE 2088919 - Caterpillar

1. Close the two pump suction shutoff valves.
PUMPS VIEWED FROM BELOW
PUMPS VIEWED FROM ABOVE2. Mark all the hoses connected to the hydraulic pumps for identification when installing the pumps, thoroughly clean around the connections, then disconnect the hoses from the pumps. Cap or plug all openings immediately.3. Support the track drive and control (auxiliary) pumps (about 120 pounds, total), remove the track pump mounting bolts, pull the pumps straight back from the gearbox until the track pump shaft is free, then move the pumps away.4. Support the conveyor pump (about 26 pounds), remove the pump mounting bolts, pull the pump straight back from the gearbox until the shaft is free, then move the pump away. Cover the opening in the gearbox. 5. Attach fabricated lifting lugs to the gearbox.6. Attach a lifting beam and lifting device to the lifting lugs and support the weight of the gearbox (about 150 pounds).Two Pump Drive Gearbox Assembly (Funk Spec. No. 10560A, Model 28102BA) 7. Remove the bolts from the flywheel housing.8. Pull the gearbox straight back from the engine, using care to avoid letting the gearbox drive shaft support the weight of the gearbox.9. After the shaft is free, lift the gearbox away.10. If necessary, remove the drive plate from the flywheel.Disassembling The Gearbox
1. Pull the input shaft and shaft adapters from the gearbox, if still installed. Mark the shaft adapters for identification during reassembly.2. Unbolt and remove the adapter plates.3. Pull the gear-and-bearing assemblies from the gearbox.4. Unbolt and remove the flywheel housing.5. Pull the pinion-and-bearing assembly from the gearbox.6. Pull the bearings off the gear shafts.7. Remove the input shaft seal, if not already removed.8. Inspect the case for cracks or other damage, especially around the bolt holes and shoulders that support bearings.9. Clean and inspect gears and shafts for chipped, broken or cracked teeth or splines.10. Clean and inspect the bearings.Assembling The Gearbox
Reassemble in reverse order of disassembly, placing the gear-and-bearing sub-assemblies first in the housing. Guide the adapter plate or flywheel housing over the exposed bearings and tap the plate or housing sharply to ensure that the bearings have moved into the bores completely. Use a new gasket between the flywheel housing and gearbox housing. Turn the input shaft by hand to ensure that the unit is free running. (Any binding of bearings in housing bores will load the bearings endwise and cause excessive heat when running). Install a new input shaft seal.Installing The Gearbox
The operating lifetime of the gearbox depends a great deal on proper installation and initial startup. Misalignment between engine components and/or gearbox components can drastically reduce the life of the gearbox. It is, therefore, good practice to check the flywheel and flywheel housing runout before installing the gearbox.
CHECKING FLYWHEEL HOUSING FACE1. Check the flywheel housing face by bolting a dial indicator to the flywheel so that the indicator is perpendicular to the housing face and the indicator stem rides on the housing face. The reading should not exceed the following: Hsg. Bore