VALVE GP-SOLENOID 1607203 - Caterpillar

At operating temperature, the hydraulic oil tank is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in the hydraulic system before any hydraulic lines or components are disconnected or removed.
Release the pressure in the hydraulic system as follows:a. Shut off the engine.b. Move the control levers through their full travel strokes. This will relieve any pressure that may be present in the pilot system.c. Slowly loosen the air breather cap on the hydraulic oil tank to release the pressure.d. Tighten the air breather cap on the hydraulic oil tank.e. The pressure in the hydraulic system has now been released. Lines and components can now be removed. Put identification on all hoses for installation purposes. Cap and plug all hoses and tubes to prevent foreign material from entering the system. Drain all fluids in a suitable container for storage or disposal.1. Drain the transmission and the hydraulic tank. The capacity of the transmission is 114 liters (30 U.S. gal). The capacity of the hydraulic system is 170 liters (45 U.S. gal). 2. Remove the crankcase guard. Disconnect two hose assemblies (1), one on each side.3. Disconnect hose assembly (4).4. Install a transmission jack or a suitable support under supplemental steering pump (3). Secure the supplemental steering pump to the transmission jack. The weight of the supplemental steering pump is 59 kg (130 lb). Install the supplemental steering pump in reverse order. Refer to the Topic "Lubricant Viscosities and Refill Capacities" in the "Operation and Maintenance Manual" for the proper filling procedure and the proper levels for the hydraulic system and the cooling system.Disassemble Supplemental Steering Pump
Start By:a. remove supplemental steering pump FLUID SPILLAGE CONTAINMENTCare must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to "Tools and Shop Products Guide, NENG2500", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose fluids according to local regulations and mandates. 1. Remove nuts and washers (1) and flange assembly (2). 2. Remove O-ring (3), bushing (4) comes with flange assembly. 3. Remove pins (5) and O-ring (6).4. See SEHS8428-01 for replacement of bushings (7) 5. Remove housing (8) and disassemble. 6. Replace bushings (9) if necessary.7. Seal assembly (10), plate (11), gear (12) and (13), plate (14) and seal assembly (15). Coated side of plates (11) and (14) face the gears. 8. Remove studs (16) and pins (19) if necessary.9. Remove coupler (17), ring (18) and O-ring seal (20). 10. Use Tool (A) to remove retaining ring (21). 11. Remove nuts and washers (22) and housing (23). 12. Remove bushings (24) and O-ring (27). Remove studs (25) and pins (26) if necessary. Disassemble components in (23). 13. Remove bushings (28), seal assembly (39), plate (30), gear (31) and (32), plate (33) and seal assembly (34). Coated side