HYDRAULIC SYSTEM Ch 5 page 32 Orbitrol Orbitrol: Displacement: HA30 - 160 cmі (9.76 inі / rev) HA45 - 250 cmі (15.25 inі / rev) Rated oil flow: 25 L/min (6.60 U.S. gal / min) The Orbitrol is located on the cab front wall (firewall). Access is obtained by tilting the cab. (Ref. Operation and Maintenance Handbook) Removal Thoroughly clean the orbitrol and the area around for any accumulated dirt. Place a container below the valve to catch any hydraulic fluid spilt during removal. Mark each hydraulic line for proper location and plug lines as they are removed from valve.
From inside the cab unscrew the four bolts securing the valve to the cab floor Lift the orbitrol out from the truck for exchange or overhaul. If the valve is exchanged, save the connectors attached to the valve body. Figure 26 Installation Check the condition of the connector seals, replace if necessary. Install the connectors in the valve body. Apply a light coat of oil to the connector seals, and tighten. Apply a light coat of oil on the axle splines, and position the valve on the cab, and insert the fastening bolts. Check that the valve is properly seated, and tighten the four bolts. Install the hoses.
Control Before startup - Check that all connections are located in the same positions as before removal, and that all hoses are correctly routed. Perform startup test procedure. Ref. section: Startup test procedure. SHOP MANUAL