Lifting Arms 381
Figure 10-4
Hoses and connections
5. Check for loose nuts and bolts.
6. Check the arm stowed limit switch.
For more information, see Adjusting Arm Stowed Limit Switch on page 214.
7. Lubricate the arm moving parts as per the arm lubrication chart on page 415.
8. Lock out and tag out the vehicle (see Locking Out and Tagging Out the Vehicle on page 14).
Arm Hydraulic System
The EXPERT™ side loader equipped with the Helping-Hand
TM
automated arm uses an independent
hydraulic valve to control all arm functions. This valve is of the proportional type, meaning that the
amount of flow coming out of it depends on the position of the spool.
Figure 10-5
Proportional valve
Arm in/out
Arm up/
down
Gripper
open/close
Out: lever to left - In: lever to right
Down: lever to left
Up: lever to right
Close: lever to left
Open: lever to right
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