jcb 8080 - Boom Raise and Lower Function; Raising the Boom; Lowering the Boom

5 - 4
Excavating Controls (cont’d)
Boom Raise/Lower
! WARNING
Thoroughly warm the hydraulic oil before operating the
excavator services. Before selecting boom up, check
there are no overhead obstructions or electric power
cables.
HOP40
Raise Boom
To raise the boom pull the respective controller backwards
A. Release the controller when the boom has reached the
desired position. The boom ram incorporates damping at the
limit of boom raise, reducing the speed of the ram and
thereby eliminating shock loadings.
Lower Boom
To lower the boom, push the respective controller forwards
B. Release the controller when the boom has reached the
desired position.
Section 1 General Information
9803/9330
Section 1
5 - 4
Issue 2*
Operation
A
B
B
A
A
B
SAE ISO
*