BALANCING ARBOR PRINCIPLES OF OPERATION.

TM 55-4920-201-14

Key to figure 1-26:

teristic response of the suspended balancing arbor

1. Case assembly (2552)

to an assembly in a state,of unbalance is a tilting

action (view B). This tilting action occurs through

2. Sleeve (2484)

3. 1/8-Inch hex wrench

an internal flexible suspension element (6) at the

4. Plug (2250) with bushing

lower end of the arbor suspension rod (3). The

(2463) in bore.

upper end of the arbor is free to tilt around the

suspension rod to the extent necessary to indicate

1-30. BALANCING ARBOR PRINCIPLES OF

direction and relative magnitude of unbalance

OPERATION.

forces.

1-31. General. (See figure 1-27). The charac-

Indicator bushing

Indicator disc

Suspension rod

Balancing arbor

Fluid Reservoir

Flexible suepension element

Assembly being checked

Figure 1-27. Basic Operation of Suspension Balancer.

Change1 1-37