ORIFICE 8E7714 - Caterpillar

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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel.Note: Permit only one operator on the machine. Keep all other personnel away from the machine or in the operators sight.
Move the STIC transmission direction control switch to the NEUTRAL position.
Lower the work tool to the ground.
Engage the parking brake.
Place blocks in front of the wheels and behind the wheels.
Install the steering frame lock.
Allow only authorized personnel on the machine. Keep unauthorized personnel off the machine and in clear sight of the operator.Note: All tests and all adjustments must be made while the transmission oil is at normal operating temperature.
Do not connect or disconnect hose fittings to or from the quick disconnect nipples when there is pressure in the system. This will prevent damage to the seals that are in the fitting.
Table 1
Torque Converter Pressure
Pressure Pressure Tap Pressure at High Idle Adjustment
Torque Converter Inlet (D) Maximum pressure with cold oil is 900 kPa (130 psi). -
Lockup Clutch (E) Stabilized pressure with an activated solenoid is 2340 70 kPa (340 10 psi).
The maximum pressure is 70 kPa (10 psi) when the solenoid is not activated. -
Impeller Clutch (F) Maximum pressure is 2176 275 kPa (316 40 psi).
Minimum pressure is from 0 kPa (0 psi) to 670 kPa (97 psi). -
Torque Converter Outlet (G) Pressure is 470 138 kPa (68 20 psi).
(These pressures are for a machine in third speed, with activated brakes, with installed axle shafts, and with the torque converter in a stall condition.) -
Table 2
Required Tools
Part Number Description Quantity
1U-5481 Pressure Gauge Group 1
1U-5482 Pressure Adapter Group 1 Lockup Clutch Disengaged (Minimum clutch pressure)
The input drive shaft rotates between the torque converter and the transmission whenever the engine is running. Contact with the rotating shaft can result in personal injury or death.The rotating shaft is located under the door assemblies that are behind the machine cab. Do not allow personnel into the area behind the cab when the machine is running.
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 moving the machine to perform the test that follows.
Install a hose and a 4130 kPa (600 psi) pressure gauge on pressure tap (D).
Move the lockup clutch switch to the DISABLE position.
Engage the parking brake.
Move the STIC transmission direction control switch to the NEUTRAL position. Start the engine.
Increase the