HOSE ASSEM. 6P6650 - Caterpillar

Illustration 1 g01115941
Transmission Hydraulic Schematic
(The Transmission is in NEUTRAL and the Engine is Stopped.)
(1) Number 2 Clutch Solenoid
(2) Number 3 Clutch Solenoid
(3) Priority Valve
(4) Number 1 Clutch Solenoid
(5) Number 5 Clutch Solenoid
(6) Number 4 Clutch Solenoid
(7) Flow Control Orifice
(8) Modulating Valve for the Lockup Clutch
(9) Modulating Valve for the Impeller Clutch
(10) Slug
(11) Torque Converter Inlet Ratio Valve
(12) Slug
(13) Modulating Relief Valve
(14) Direction Selection Spool
(15) Torque Converter
(16) Lockup Clutch
(17) Impeller Clutch
(18) Selector Spool (First Speed and Third Speed)
(19) Pressure Differential Valve
(20) Load Piston
(21) Load Piston Orifice
(22) Selector Spool (Second Speed)
(23) Power Train Oil Filter for the High Pressure Circuit
(24) Power Train Oil Filter for the Low Pressure Circuit
(25) Torque Converter Bypass Orifice
(26) Power Train Oil Pump
(27) Power Train Oil Cooler
(28) Magnetic Screen
(29) Lubrication Passage for Transmission
(30) Reservoir
(31) Reservoir
(A) Pressure Tap for the Main Relief Valve
(B) Pump Pressure Tap
(C) Torque Converter Inlet Pressure Tap P3
(D) Speed Clutch Pressure Tap P1
(E) Pressure Tap for Lockup Clutch
(F) Pressure Tap for Impeller Clutch
(G) Direction Clutch Pressure Tap P2
(H) Torque Converter Outlet Pressure Tap
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, 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.
Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
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.
Troubleshooting Problem List
There is constant noise in the differential.
Noise occurs in the differential at different intervals.
Noise only occurs during turns.
Lubricant is leaking.
The drive wheels do not turn but the universal joint turns.Troubleshooting
Solve any active service codes for the power train electronic control. Use the built-in electrical diagnostics that are performed with the Vital Information Management System (VIMS) and with the electronic control module.Note: This machine is equipped with a power train electronic control. The power train electronic control has built-in diagnostics that detect