SPECIAL AR 2894459 - Caterpillar

If the machine is equipped with the quick connect ball valve use step 4 in order to connect the quick coupler arrangement. If the machine is equipped with the quick connectors (26) use step 5 in order to connect the quick coupler arrangement.
Connect the quick connect ball valve by using the following instructions.
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(27) Fixed ball valve (28) Mobile ball valve (29) Drain Plug
Remove the cover plates from the fixed ball valve (27) and the mobile ball valve (28) .
Connect the mobile ball valve (28) to the fixed ball valve (27) .
Install the bolts into the mobile ball valve (28) .
Open the fixed ball valve (27) and open the mobile ball valve (28). Use the levers that are located in the tool box in order to open the ball valves.
Place drain plugs (29) into the leakage oil ports.
Connect the quick connectors (26) by using the following instructions.
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Remove the dust caps from the male coupling of the quick disconnect. Remove the dust caps from the female coupling of the quick disconnect. Carefully clean all mating surfaces of the coupling for the quick disconnect.
Hold the flat face of the female end (32) of the coupling against the male end (30) of the coupler. Hold the female end (32) forward and rotate the main sleeve (33) clockwise.
Continue the manual connection if pressure is not felt. If pressure is detected use an open wrench and turn the coupler clockwise until the connection is completed. The completed connection is determined by the automatic feed of the sleeve (31). This will prevent the incidental loosening of the hose due to vibration.
Connect the male dust caps and the female dust caps together.Note: Always connect the dust cap to another dust cap when the coupling for the quick disconnect is active. This keeps dirt and other foreign material from contaminating the hydraulic system.
Remove the caps and the plugs from the hydraulic fittings.
Install the bolts, clamps, and the hydraulic hoses for the ball valves (25) that are located on the boom foot.
Open the four ball valves (25) .Purging the Hydraulic Circuits
After the assembly of the front parts and reconnection of the hydraulic lines, it is necessary to purge all of the hydraulic lines.Special attention should be given to the following hydraulic lines:
Load sensing line from the fore boom valve
Two pilot lines from the fore boom valve
Pilot line from the stick lowering control valveIn order to improve the purging process, nipples have been installed on some hydraulic lines.
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When the boom foot has been connected to the boom nose, loosen screw (22) and nipple (21) of the load sensing lines that are located at the bottom of boom foot (12) .In order to purge the lines, connect hose (H), connector (I) and coupler (J) to the nipples.Note: Store the items in the storage box of the machine.
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(23) Plug (24) Nipples (11) Boom nose (C) Fore boom cylinder (D) valve
Loosen plug (23) on valve (D) that is located on fore boom cylinder (C). Loosen the two