BI001967
BI001967
___________________________________________ Adjustment procedures Breaker drive chain The breaker drive chain should be checked for correct tension at regular intervals. If the chain is too loose or too tight, the power unit tray position can be moved to adjust the chain tension. To adjust the breaker drive chain tension (Fig. 52): 1. Open the covers to access the power unit. 2. Loosen the Super nuts (jack bolts) that secure the power unit tray in position as follows: a. Loosen each jackbolt on the nut 1/8 turn following a star pattern around the nut (1 round only). As you move around and get back to the first jackbolt, it will be tight again. b. Repeat a 2nd round as in Step a, loosening each jackbolt 1/4 turn in a star pattern. c.
Continue loosening 1/4 turn for 3rd and following rounds until all jackbolts are loose. Note: Usually after the 3rd or 4th round, can be completely remove.
d. Remove, clean and lubricate with Never Seeze the jackbolts prior to installation. e. Repeat this process for all nine (9) Super nuts. 3. Open both grease valves. To tighten the chain (move the power unit tray towards the tail shaft): 4. Loosen the grease fitting on the left take-up cylinder so that it can collapse as the chain is loosened. 5. Pump grease into the grease fitting on the right take-up cylinder until the correct chain tension is achieved. To loosen the chain (move the power unit tray towards the head shaft): 4. Loosen the grease fitting on the right take-up cylinder so that it can collapse as the chain is loosened. 5. Pump grease into the grease fitting on the right take-up cylinder until the correct chain tension is achieved. 6. Close the open grease fitting. 7. Close both grease valves. 8. Install the take-up shims to fill the gap between the power tray and the grease cylinder mount.
______________________________________________________________ A6474X354 REV 3 5.73
