PISTON (STANDARD) 2F3665 - Caterpillar

Steering Force Check
Check the force needed to turn the steering wheel. The torque must be as follows: (a) To turn the steering wheel very slowly when the engine is stopped ... 4.0 to 4.5 N m (35 to 40 lb in)(b) To turn the steering wheel very slowly when the engine is at low idle ... 2.3 to 2.8 N m (20 to 25 lb in)Steering Time Check
To check the steering time, put the machine on a dry, hard surface. With the engine at high idle, the time for a full turn, from stop to stop, must not be more than 2.5 to 3.0 seconds.With the service brakes off, the difference between the time for a right turn and the time for a left turn must not be more than .3 second. With the service brakes activated, the time must not increase more than .2 second.If the difference between the times for a full right turn and a full left turn with the service brakes off is more than .3 second:1. Remove the end cover from steering control valve (1).2. Add flow balance shims (2) to decrease the right turn time (steer faster) and increase the left turn time (steer slower). If the flow balance shims are removed, the result is opposite.3. Flow balance shims (2) are available in two thicknesses. 5J4776 Shims are 0.13 mm (.005 in) thick. 4J8224 Shims are 0.25 mm (.010 in) thick. Two 4J8224 Shims will change the steering time at high idle by approximately .1 second.Example: A check of the steering times shows that the right turn time is .4 second more than the left turn time. Flow balance shims (2) must be added to decrease the difference between the times. The addition of four 4J8224 Shims will decrease the right turn time by approximately .2 second and increase the left turn time approximately .2 second. This will make the right and left turn times approximately the same.4. Install the end cover on the control valve.
Steering Control Valve
(1) Control valve. (2) Flow balance shims. (3) Cylinder flow shims.If both steering times (right and left) are slow, cylinder flow shims (3) must be added. 4J6806 Shim thickness ... 1.22 mm (.048 in)One shim will change the steering times at high idle by approximately .1 second.If the steering time(s) with the service brakes activated is .2 second more than the time(s) with the service brakes off, the shuttle valve seat(s) or seal(s) is bad.Steering System Pressure Test
Loosen the fill cap on the tank to permit the pressure in the tank to go down before installation or removal of any test equipment. To prevent personal injury, make reference to on first page of Steering System Testing And Adjusting section.
Main Relief Valve
1. Install the steering frame lock link so the machine can not turn.
Steering Frame Lock Link Installed If the steering frame lock link can not be installed, the pressure setting can be checked by an adjustment of the striker that is not