Case 580, 590, Super M and Super M Plus Series 3 Backhoe Manual

Table of Contents

• General
• Engine
• Fuel System
• Electrical
• Steering
• Power Train
• Brakes
• Hydraulic System
• Mounted Equipment
• Electrical Schematics
• Hydraulic Schematics

Manual Extract: Load Sense Relief Valve Pressure Check

1. Park the machine on a level surface. Put the backhoe in the transport position and lower the loader bucket to the floor.
2. Stop the engine, turn on the ignition switch and pilot control switch, operate pilot controls and loader controls to relieve any pressure in the system.
3. Connect a pressure gauge with a capacity of at least 345 bar (5000 psi) to the “M” port, use adapter 101792A1, on the backhoe valve, see page 16.
4. The oil must be at operating temperature. To heat the oil, do the following steps: A. With the engine running at full throttle, hold the loader control lever in the ROLLBACK position for 15 seconds.
B. Put the loader control lever in the NEUTRAL position for 15 seconds.
C. Repeat steps A and B until the temperature of the oil is 125°F (51°C) or the side of the reservoir is very warm.
5. Start and run the engine at high idle, hold a stabilizer over relief, record the reading.
6. Compare the reading with the specifications on page 3.
7. If the pressure setting is not correct, adjust the load sense relief valve.