2003/07/14 Correction to Systems Operation , "Selector and Pressure Control Valve" {3073, 3157} Caterpillar


Correction to Systems Operation , "Selector and Pressure Control Valve" {3073, 3157}
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2003/07/14 [SEPD0691]
POWER TRAIN
VALVE GP-PRESSURE CONTROL
2003/07/14 Correction to Systems Operation , "Selector and Pressure Control Valve" {3073, 3157}
Track-Type Tractor:
D9R (S/N: 7TL1-UP)
Systems Operation, SENR8349, "D9RTrack-Type Tractor", "Selector and Pressure Control Valve". This module is part of Service Manual, SENR8460.

Replace the illustration of the selector and pressure control valve in the "Selector and Pressure Control Valve" section with the following graphic.




Illustration 1g00992474

Selector and Pressure Control Valve

(A) First gear

(B) Second gear

(C) Third gear

(D) REVERSE

(E) NEUTRAL

(F) FORWARD

(1) Speed selector spool

(2) Modulation relief valve

(3) Load piston

(4) Inlet passage from transmission oil pump

(5) Outlet passage to torque converter

(6) Ratio valve

(7) Pressure differential valve

(8) Direction selector valve

Replace the illustration of "Transmission Hydraulic Controls" in the "Engine Running (Transmission in Neutral)" portion of the "Operation of the Transmission Hydraulic Controls" section with the following graphic.




Illustration 2g01006274

Transmission Hydraulic Control (Engine Running, Transmission in Neutral)

(1) Priority valve

(2) Speed selection spool

(3) Valve body

(4) Load piston

(5) Screened orifice

(6) Orifice

(7) Pressure differential valve

(8) Orifices

(9) Flow control orifice

(10) Direction selection spool

(11) Ratio valve

(12) Orifice

(14) Modulation relief valve

(E) No. 5 clutch

(F) No. 4 clutch

(G) No. 1 clutch

(H) No. 2 clutch

(J) No. 3 clutch

(AA) Speed clutch pressure (P1)

(BB) Torque converter inlet pressure (P3)

(LL) Return oil

Replace the illustration of "Transmission Hydraulic Controls" in the "Engine Running (Neutral To First Speed Forward)" portion of the "Operation of the Transmission Hydraulic Controls" section with the following graphic.




Illustration 3g01006275

Transmission Hydraulic Control (Engine Running, Neutral to First Speed Forward)

(1) Priority valve

(2) Speed selection spool

(3) Valve body

(4) Load piston

(5) Screened orifice

(6) Orifice

(7) Pressure differential valve

(8) Orifices

(9) Flow control orifice

(10) Direction selection spool

(11) Ratio valve

(12) Orifice

(14) Modulation relief valve

(E) No. 5 clutch

(F) No. 4 clutch

(G) No. 1 clutch

(H) No. 2 clutch

(J) No. 3 clutch

(AA) Speed clutch pressure (P1)

(BB) Torque converter inlet pressure (P3)

(DD) Direction clutch pressure (P2)

(LL) Return oil

Replace the illustration of "Transmission Hydraulic Controls" in the "Pressure Differential Valve Operation" portion of the "Operation of the Transmission Hydraulic Controls" section with the following graphic.




Illustration 4g01006277

Transmission Hydraulic Control (Pressure differential valve operation)

(1) Priority valve

(2) Speed selection spool

(3) Valve body

(4) Load piston

(5) Screened orifice

(6) Orifice

(7) Pressure differential valve

(8) Orifices

(9) Flow control orifice

(10) Direction selection spool

(11) Ratio valve

(12) Orifice

(14) Modulation relief valve

(E) No. 5 clutch

(F) No. 4 clutch

(G) No. 1 clutch

(H) No. 2 clutch

(J) No. 3 clutch

(AA) Speed clutch pressure (P1)

(BB) Torque converter inlet pressure (P3)

(LL) Return oil

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