Input Shaft Disassembly

TM-5-3820-256-24-5 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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D. Input Shaft Disassembly - Refer to Page PM2 and PM6 1. Remove the rear cover (Item 25) or, if so equipped, the PTO assembly. 2. Remove the front seal carrier (Item 5 or 6). 3. Use a brass rod or aluminum bar to protect the end of the shaft, tap threaded end enough to place the direct drive gear (Item 22) just against the inside back wall of the transfer case housing. Slide the underdrive pinion gear (Item 19) toward the front of the case. This will expose the split retaining ring (Item 20 See Fig. 5). Use a drift to drive the retaining ring from the shaft. Fig. 5 4. Tap on the rear end of the shaft (See Fig. 6) and remove the shaft and the front bearing (Item 18) at the front of the case. Since the bearings (Item 11 and Item 24) are press fitted on the shaft, the shaft will not "just slip out". 5. Items 19,10, 22, 23 and 24 can now be removed from inside the case. Fig. 6 E. Intermediate Shaft Removal - Refer to Page PM2 and PM5. 1. Remove the capscrews from the front (Item 29) and rear (Item 45) caps. Remove the front (speedo) cap. Remove nut, speedo drive gear and spacer (Items 31, 32, and 33). Screw alignment tool (See Fig. 20 and 21) on to the end of the shaft. Place alignment studs (Fig. 28) in two holes of the rear cap (Item 45). 2. Drive on end of alignment tool until the rear cap is clear of the case housing. Remove the cap along with the outer race and roller assembly of Item 42. 3. Block between the underdrive gear (Item 36) and the rear of the case, continue driving the alignment tool until the shaft is free of the gear and the transfer case. Remove the gear (Item 36 with Item 35 still in place) and the spacer ring (Item 34) from the inside of the case. F. Rear Output Shaft Removal -Refer to Page PM2 and PM4 1. Remove the front (Item 17) and rear (Item 56 or 57) covers. Tap the output (rear) end of the shaft with a suitable tool. Remove bearing cup (Item 47) from the front of the case. Block between the gear (Item 50) and the case while continuing to drive the shaft out the front of the case. 2. Remove the gear, spacer ring (Item 51), bearing cone (Item 52) from inside the case. 3. Remove the split ring (Item 39) from the shaft only if it is being replaced. -13-

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