5) Start the filter caddy. Check to be sure oil is flowing through the filters. Operate filter caddy approximately 10 min- utes so oil in hydraulic oil tank is circulated through filter a minimum of four times. Hydraulic tank capacity : 130 (34.3 U.S. ц gal ) Leave filter caddy operating for the next steps. 6) ц Start the engine and run it at high idle. For the most effective results, cleaning pro- cedure must start with the smallest capacity circuit then proceed to the next largest capacity circuit. 7) Operate all functions, one at a time, through a complete cycle in the following order: Clam, steering, bucket, and boom. Also include all auxiliary hydraulic functions.
Repeat procedure until the total system capacity has circulated through filter caddy seven times, approximately 30 minutes. Each function must go through a minimum of three complete cycles for a through cleaning for oil. ц Filtering time for machines with auxiliary hydraulic functions must be increased because system capacity is larger. 8) Stop the engine. Remove the filter caddy. 9) Install a new return filter element. 10) Check oil level in hydraulic oil tank ; Add oil if necessary. 5-16