Case 521F Wheel Loader Repair Manual

Model: Case 521F Tire II
Manuals: Service Manual
Introduction
Engine
Four Wheel Drive System
Front Axle
Rear Axle
Hydrostatic Drive
Brakes and Controls
Hydraulic System
Frames and Ballasting
Steering
Cab Climate control
Electrical System
Front Loader and Bucket
Platform, Cab, Bodywork and Decals
Special Tool Index
Manual Extract (Tier 2): Steering pressure limit setting
With the engine at high reeves, the pressure of the port P of the tool distributor must be between 239 and 243 bar:

– make sure that the pressure value stated in paragraph A is as specified (22-25 bar); – with the engine OFF and bucket on the ground, connect a quick coupling pressure gauge to the pressure point P of the tool distributor; – with the articulation locked, engine at high revs and JSS ON begin steering with the joystick in both directions to its limit stop. Keep this condition and read the pressure value on the pressure gauge, which must be equal to that specified above (239 and 243 bar);

– if the pressure gauge records a pressure above or below the specified one, check that all the hydraulic connections have been made correctly.

The speed of steering is not constant but depends on the speed reached by the vehicle. On reaching 20 km/h the steering sensitivity is reduced by 80% compared to the normal speed of steering.

The JSS can be set on three different levels of steering speed.
The three speed levels are:
1. from 4.5 to 5.5 sec.*
2. from 3.2 to 4.5 sec.*
3. from 2.8 to 3.2 sec.*
*(time to take the unit from all right to all left).
Identify the Tier Level of your Equipment (Read our Article on Tier Level )