SCREW LOCK 0829226 - Caterpillar

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.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. 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 on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Make sure that the parking brake is applied. Make sure that the propel control lever is in NEUTRAL position.
Place blocks under both sides of the drums and the tires (if equipped).
Illustration 1 g00677194
(1) Brake Lines
Set the brakes by disconnecting the brake lines (1) at the X7 port. Cap the brake lines (1) and plug the X7 port that is marked on the pump .
Illustration 2 g00677560
(2) Propel Pump Control Linkage
Disconnect the propel pump control linkage (2) from the directional control valve.
Illustration 3 g00677561
(3) Plug M4
Illustration 4 g00677563
(4) Plug M5
Remove plugs at M4 port (3) and M5 port (4).
Connect two 60000 kPa (8700 psi) pressure gauges to the M4 port (3) and M5 port (4).
Start the engine. Run the engine at high idle.
Look at the pressure gauges. The pressures on the two gauges should be equal.
Illustration 5 g00677603
(5) Locknut (6) Adjustment Screw
If it is necessary to adjust the neutral position of the piston, loosen locknut (7) of the manual displacement control.
Turn the neutral adjustment screw (6) clockwise until the pressure gauge shows an increase in pressure. Mark the position of the screw. Turn the neutral adjustment screw (6) counterclockwise until the other pressure gauge shows an increase in pressure. Mark the position of the screw.
Turn the screw clockwise to a position that is halfway between the positions that are marked.
Look at the pressure gauges. The pressures on the two gauges should be equal.
Stop the engine. Remove the two 60000 kPa (8700 psi) gauges. Replace the gauges with two 4000 kPa (580 psi) gauges.
Hold the adjustment screw (6). Tighten locknut (5) to a torque between 14 N m (10 lb ft) and 24 N m (18 lb ft).
Remove the pressure gauges from the M4 port and the M5 port. Replace the plugs at M4 port (3) and M5 port (4) .
Reconnect the propel pump control linkage (2) to the directional control valve.
Reconnect the brake lines (1) to the propel pump.
Remove the blocks from the drums and the tires (if equipped).