RING-RETAINING 3D7943 - Caterpillar

Personal injury can result from rotating and moving parts. Stay clear of all rotating and moving parts.Never attempt adjustments while the machine is moving or the engine is running unless otherwise specified.The machine must be parked on a level surface and the engine stopped.Attach a "Do Not Operate" or similar warning tag to the start switch and controls before servicing, repairing, or making adjustments to the machine.
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Care 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 Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
Drive the machine to a smooth, horizontal surface.
Illustration 1 g01511403
Move propel lever (3) to the NEUTRAL position.
Rotate speed dial (2) to the MINIMUM position.
Move parking brake switch (1) to the ON position.
Illustration 2 g01511404
Move screed lift switch (4) to the FLOAT position. Lower the screed to the ground.Note: The screed lift switch on the inactive instrument panel must also be in the FLOAT position in order to lower the screed.
Illustration 3 g01516679
Move throttle control switch (5) to the LOW IDLE position. Hold the switch in this position for less than 1 second.
Illustration 4 g01516680
Lift rear access door (6).
Illustration 5 g01516681
Monitor pressure on pressure gauge (9) for the following step. The counterbalance valve has a range of 170 to 2760 kPa (25 to 400 psi).
Loosen locking ring (8) .
Turn counterbalance pressure adjustment valve (7) in the clockwise direction. Verify that the pressure increases.
Turn counterbalance pressure adjustment valve (7) in the counterclockwise direction. Verify that the pressure decreases.
Adjust counterbalance pressure adjustment valve (7) in order to obtain a pressure of 520 kPa (75 psi).
Tighten locking ring (8) .
Illustration 6 g01516682
Move engine start switch (10) to the OFF position.
Close rear access door (6) .