226 Lifting Arms
Adjusting Arm Speed
NOTE: No arm speed adjustment is required unless replacing the valve or one of its sections.
Arm speed is controlled by the amount of hydraulic fluid (flow) that is being sent to the arm cylinder.
The arm control valve spools can limit the flow of hydraulic oil, depending on the section of the
valve
1
. Flow is limited by two movement restrictors located on each section.
Figure 10-21
Movement restrictor
To adjust arm speed:
1. Lock out and tag out the vehicle (see Locking Out and Tagging Out the Vehicle on page 12).
Gripper down 2000 (96 gallons, std & HD)
2700 (300 gallons, HD)
2.5 (all models)
Gripper close 1200 (96 gallons, std & HD)
1200/1800 (300 gallons, HD)
1.5 (96 gallons, std & HD)
2.25 (300 gallons, HD)
Gripper open 1200 (96 gallons, std & HD)
1200 (300 gallons, HD)
1.5 (96 gallons, std & HD)
2.5 (300 gallons, HD)
1. Limiting spool strokes limits the quantity of oil (flow) going through them. Controlling the flow of oil means controlling arm speed.
Danger!
Do not stand in the path of the arm while carrying out these adjustments.
Table 1 Arm operating pressure and cycle times (Continued)
Arm function Pressure setting (psi) Cycle time (sec.)
To Next Page
Loading...
Need help?
General
