5.1 Spring Quantity and Size
5.2 Spring Adjustment
7
5. Setting Springs’ Balance with Boom Weight
Attention: The springs are set to be balanced in factory. DO NOT change the boom length or weight
if it is not necessary. If the boom length or weight must be changed (e.g.: adding a Stop Sign on the
boom), the balance must be adjusted by a qualified service person.
5.2.1 Remove the screws on the Cabinet hat, and remove the hat. (Fig. 8)
Boom Length
x≤3m
3m
＜
x≤4m
4m
＜
x≤5m
5m
＜
x≤6m
Quantity of spring
1
1
2
2
Spring Size
Φ4
Φ5
Φ5
Φ5+Φ6
Fig.8
Loosen screws
