CYLINDER & SEAL GP-BOOM 2742509 - Caterpillar

Introduction
For Systems Operation and Troubleshooting, make reference to Systems Operation, Testing and Adjusting, D11R Track-Type Tractor Power Train, Form SENR9405. For Specifications, make reference to Specifications for D11R Track-Type Tractor Power Train, SENR9404. If the Specifications in SENR9404 are not the same as in the Systems Operation and the Testing and Adjusting, look at the printing date on the back cover of each book. Use the specifications given in the book with the latest date.
Personal injury can result from machine movement. Perform the following steps before performing any tests or adjustments.
1. Lower the bulldozer and ripper to the ground.2. Put blocks in front of and behind the tracks.3. Allow only approved personnel on the machine and keep other personnel off of the machine and in clear view of the operator.4. When testing must be done in a closed area and whenever possible, activate the service brakes if the parking brake cannot be used. All tests and adjustments must be made with the oil in the power train hydraulic system at normal temperature for operation.Many of the pressure taps for testing the power train hydraulic system have quick disconnect couplings already installed (they may not be shown in the photos).Do not connect or disconnect the couplings when there is pressure in the system. This will prevent damage to the seal that is in the coupling.Transmission Hydraulic Controls (First Speed Reverse, Engine Running)
1. Selector and pressure control valve.2. Lubrication manifold.3. Torque converter oil filter.4. Torque converter.5. Outlet relief valve.6. Speed selector spool.7. Load piston.8. Pressure differential valve.9. Modulation relief valve.10. Ratio valve for torque converter.11. Direction selector spool.12. Power train oil pump.13. Transmission oil filter.14. Priority valve.15. Steering clutch and brake control valve.A. Planetary lubrication pressure tap.B. Steering clutch and brake lubrication pressure tap.C. Outlet relief valve pressure tap.D. Speed clutch (P1) pressure tap.E. Direction clutch pressure tap.F. Priority valve pressure tap.AA. Supply, speed clutch pressure (P1).BB. Direction clutch pressure (P2).EE. Torque converter inlet.FF. Torque converter outlet.GG. Lubrication oil.LL. Drain oil.Location Of The Pressure Taps
Many of the pressure taps for testing the power train hydraulic system have quick disconnect couplings already installed. Do not connect or disconnect the couplings when there is pressure in the system. This will prevent damage to the seal that is in the coupling.
(A) Planetary lubrication.
(C) Outlet relief valve.
(F) Priority valve.
(B) Steering clutch and brake lubrication pressure.
(D) Speed clutch [P1]. (E) Direction clutch [P2]. (G) Load piston plug.
(H) Left steering clutch. (J) Left brake. (K) Right clutch. (L) Right steering brake.Transmission Pressure Chart
Transmission Hydraulic Control Valve.
(1) Selector and pressure control valve. (7) Load piston. (15) Spacers.
Priority Valve
(14) Priority valve. (17) Spacers.Steering and Brakes
133-3255 Control Valve
STEERING AND BRAKE PRESSURE TAPS
H. Left steering clutch. J. Left brake. K. Right steering clutch. L. Right brake.Solenoid Test
Make reference to the Warning on the first page of testing and adjusting section.
This test will determine if the electrical coil is energizing and the plunger is shifting to permit oil flow.Hearing a solenoid click or checking to see if the coil is energized