Usage:
NOTE: Drum need not be removed from machine for any tests found below (with the possible exception of feeler gauge tests).
A. Weight Bearing Test
1. To check weight bearings, remove vibratory motor, coupling and key.
NOTE: For coupling removal, refer to Section B of Drum Disassembly Information in this manual.
2. Mount dial indicator base on stub shaft and indicator actuator arm at point A.
3. Insert pry bar between stub shaft and weight shaft.
4. Pry the weight shaft up and note readings.
5. Radial play for the Rumbler should not exceed .017.
6. If a reading exceeding this limit is obtained, replace bearings.
7. If bearings (or stub shafts) are removed from the machine, visually inspect for damage.
8. Insert feeler gauge between roller and outer race of of bearing. Maximum allowed clearance is .010.
NOTE: Refer to Section D, Page 14 for cross section of bearing test points.
B. Support Bearing Test
1. Remove vibratory motor shield, vibratory motor and coupling.
2. Mount dial indicator base to motor mounting plate and indicator actuator arm at point B.
3. Place a jack under motor mounting plate and lift.
4. Total movement (end play) measured at point B must not exceed .008.
5. If reading is in excess of .008, check for loose bearing retainer. If retainer is tight, replace bearings.
C. Weight Shaft Alignment Test
1. Attach dial indicator base to weight shaft. Position dial indicator actuator at point C.
2. Position the indicator at approximately one revolution to allow readings to go plus or minus.
3. Rotate dial to zero reading.
4. Rotate weight shaft slowly. Note and mark highest (plus) and lowest (minus) readings for one complete revolution. Record the entire reading.
5. If the total (plus and minus) reading is more than .025, realignment of the weight shaft will be necessary.
NOTE: Weight shaft alignment test should be performed only after weight bearing and support bearings have been ascertained as being good.
NOTE: Refer to Section D, below for cross section of bearing test points.
E. Weight Shaft Realignment
1. If realignment is necessary, position the drum with the lowest (minus) reading down.
2. Place a hydraulic jack between stub shaft rim and drum on far side of drum.
3. With jack holding stub shaft securely in place, remove every other lug nut and reverse them placing flat side in. Tighten lug nuts lightly, then remove other four and reverse.
4. Rotate the indicator dial to zero.
5. Using the jack, raise the stub shaft until the indicator shows a movement that is 1/2 the total reading that was recorded in Step 5 of weight shaft alignment test.
6. Tighten the eight budd nuts with the flat side in.
7. Repeat the weight shaft alignment test to see if total indicator reading is less than .025.
8. If a reading of more than .025 is obtained, repeat realignment procedure until correct reading is attained.
9. Once correct reading is reached, torque budd nuts to 350 ft. lbs..
10. Repeat weight shaft alignment test to determine that the housing has not moved during previous step.
11. Drill four 1/2" diameter holes randomly placed through stub shaft and into drum head.
12. Using a suitable driver, drive 21/2" x 2" spiral or roll pins into reamed holes.
NOTE: If adjusting right side stub shaft does not bring total reading within .025 the left side stub shaft will also need repositioning.