OM4006.1 06/98 Maintenance - Section 4 Lubrication and Service Page 4-11 STEERING CIRCUIT FILTER Removal The brake and steering circuit filter is located on the left frame rail, forward of the hydraulic tank. Relieve pressure before disconnecting hydraulic and other lines. Tighten all connections before applying pressure. Hydraulic fluid escaping under pressure can have sufficient force to enter a person’s body by pene- trating the skin and cause serious injury and pos- sibly death if proper medical treatment by a physician familiar with this injury is not received immediately. 1. With the key switch ‘‘Off’’ allow at least 90 seconds for the accumulators to bleed down. 2.
Remove plug (10, Figure 4-3) and drain oil from the housing into a suitable container. Take care to avoid contact with hot oil if truck has been operating. Avoid spillage and contamination! 3. Remove housing (8) and element (7). 4. Replace O-ring (4) and backup ring (5) in filter head. Installation 1. Install new element (7). Install housing (8) and tighten. 2. Replace drain plug (10), and O-ring (9). NOTE : The indicator switch (2, Figure 4-3) is preset to actuate at 35 psid (241 kPa) and is not repairable or adjustable. If the indicator switch is inoperative, replace the com- plete switch. Attempting to adjust the switch is not recommended. FIGURE 4-3. STEERING CIRCUIT FILTER 1. Head 2.
Indicator Switch 3. O-Ring 4. O-Ring 5. Backup Ring 6. Bypass Valve 7. Filter Element 8. Housing 9. O-Ring 10. Plug