 Most viewed - Apache lift box repair |
Reference: Rear gear box, rear side.564 viewsRear side of rear gear box. Steel roll pin is 3/16" diameter by 1-1/2" long. This is where the crank handle connects. The zinc washer is 2" diameter with a 3/4" hole and is a tad thicker than the original one (I couldn't find a thin one). The grommet between the washer and case is 1-5/8" outside diameter (OD) and 1/4" thick so it's just slightly thinner than the original one.
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550 viewsIndexes all lined up. Ready for the case halves to be mated now.
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Reference: Rear gear box, front side.547 viewsFront side of rear gear box. Steel roll pin is 3/16" x 1-1/4". This is where the drive shaft fits.
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546 viewsThe repaired pin in place. Thin plastic washer goes between the gear (front and rear gears) and the case.
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536 viewsAll the bearings are roller bearings and they are held in with the grease. When cleaning the grease and wiping the bearings they will most likely fall out so work over a soft, plush towel to keep them from bouncing away. Pack the bearings and cage surfaces with fresh grease and slip any fallen bearings back in. You should see no gaps between the bearings. Pack more grease in when they're all in and roll them around with your finger to spread the fresh grease around. It will hold them in there.
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527 viewsInside of forward gear and planetary gear mating teeth.
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516 viewsLeft to right: Rear of gear box with rearward ring, laying on table is planetary ring, behind that is the forward ring, and behind that is a thin plastic washer.
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515 viewsThe new pin in the hole, ready for welding.
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514 viewsI ground the planetary pin level and then drilled a 3/16" hole in it to a half-inch depth. I got a piece of 3/16" rod from the local hardware store, beveled the edge, then pushed it into the hole.
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511 viewsPermatex 2A gasket silicone is what I smeared on the mating surfaces of the case half instead of using a gasket.
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507 viewsThe pin is missing. Looks melted...??? Without this pin set in the case halves the planetary ring rotates and doesn't allow the forward gear to rotate properly.
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504 viewsRepaired pin cut, ground further, and beveled. Fits in the hole nicely! Remember, the planetary ring will move side-to-side so make sure the pin isn't butted against the end of the hole. Allow for the movement.
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504 viewsBearing grease (red) applied on the planetary teeth for mating to the rearward gear. I followed the instructions for the "new" teeth so I hope this is okay for the "old" teeth. I think it should be.
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500 viewsCloser-up. Exploded view. Notice pin is short...it came to us broken.
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499 viewsInside of rearward gear and planetary gear mating teeth.
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Reference: Front gear box497 viewsPlanetary pin on left side of box (bottom of picture), drive shaft with roll pin is on the right side of the picture.
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495 viewsSame thing for forward gear.
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490 viewsPin welded in and ground. The gears are plastic and so after each weld you need to dip the pin into water to cool it down otherwise the plastic holding the pin will melt...as I found out. But the plastic didn't melt too badly and the original pin is still secure.
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487 viewsTaken apart with the rear case fully removed.
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479 viewsPlanetary gear in position and pin marked where it needs to be cut.
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