CX28 On-Highway Transmission Caterpillar


Power Train Pressures

Usage:

CX28 T3X



Illustration 1g01739593

Left side view

(1) Pressure Clutch 1




Illustration 2g01739774

Bottom view

(2) Clutch 2 pressure

(3) Clutch 3 pressure

(4) Clutch 4 pressure

(6) Torque converter lockup clutch pressure

(7) Transmission hydraulic control pressure

(8) Torque converter inlet pressure

(9) Torque converter outlet pressure

(10) Transmission lube pressure




Illustration 3g01739613

Rear view

(5) Clutch 5 pressure




Illustration 4g01741578

Front view

(11) Filter inlet pressure

Table 1
Pressure Taps     Description     CX28 Specified Value    
        Pressure at 700 rpm     Pressure at 2100 rpm    
1     Top Pressure for Clutch 1 when engaged    
1655 ± 69 kPa (240 ± 10 psi)    

1862 ± 69 kPa (270 ± 10 psi)    
2     Top Pressure for Clutch 2 when Engaged    
1655 ± 69 kPa (240 ± 10 psi)    

1862 ± 69 kPa (270 ± 10 psi)    
3     Top Pressure for Clutch 3 when Engaged    
1724 ± 69 kPa (250 ± 10 psi)    

2000 ± 69 kPa (290 ± 10 psi)    
4     Top Pressure for Clutch 4 when Engaged    
1724 ± 69 kPa (250 ± 10 psi)    

2000 ± 69 kPa (290 ± 10 psi)    
5     Top Pressure for Clutch 5 when Engaged    
1655 ± 69 kPa (240 ± 10 psi)    

1896 ± 69 kPa (275 ± 10 psi)    
6     Pressure for the Torque Converter Lockup Clutch    
1655 ± 69 kPa (240 ± 10 psi)    

1862 ± 69 kPa (270 ± 10 psi)    
7     Relief Pressure for the Transmission Hydraulic Control    
1827 ± 138 kPa (265 ± 20 psi)    

2068 ± 138 kPa (300 ± 20 psi)    
8     Relief Pressure for the Torque Converter Inlet    
276 ± 138 kPa (40 ± 20 psi)    

724 ± 138 kPa (105 ± 20 psi)    
9     Minimum Pressure for the Torque Converter Outlet    
241 ± 138 kPa (35 ± 20 psi)    

483 ± 138 kPa (70 ± 20 psi)    
10     Relief Pressure for the Transmission Lube     Minimum
21 ± 69 kPa (3 ± 10 psi)    

276 ± 69 kPa (40 ± 10 psi)    
11     Relief Pressure for the Filter Inlet    
1827 ± 138 kPa (265 ± 20 psi)    

2206 ± 138 kPa (320 ± 20 psi)    

Table 2
CX28 Transmission Clutch Assignments    
Operation     Gear Ratios     CLUTCHES     Transmission Output Speed at 800 RPM Input with LUC Engaged (RPM)     Transmission Output Speed at 2200 RPM Input with LUC Engaged (RPM)    
1 2     3     4     5    
Neutral                         O     −     −    
1 Forward     3.76     O                 O     −     −    
2 Forward     1.96     O             O         407     1120    
3 Forward     1.35     O         O             591     1626    
4 Forward     1.00     O     O                 800     2200    
5 Forward     0.78         O     O             1029     2830    
6 Forward     0.65         O         O         1231     3384    
Reverse     -3.97             O         O     202     555    

Caterpillar Information System:

CX28 On-Highway Transmission Relief Valve (Transmission Hydraulic Control) - Test and Adjust
C13 On-highway Engine Engine Oil Pump
G3520C and G3520E Generator Set Engines Engine Speed - Test
G3520C and G3520E Engines Flywheel Housing
G3520C and G3520E Generator Set Engines Sensor Supply - Test
C15 On-Highway Engine Engine Oil Pan
C11 and C13 Engines and 14M and 16M Motor Graders Starting Aid - Test
Adapting the Jacobs Brake Module Function{1119, 1129} Adapting the Jacobs Brake Module Function{1119, 1129}
C13 On-highway Engine Electric Starting Motor
C15 and C18 Engines for Caterpillar Built Machines Speed/Timing - Test
3512B Marine Auxiliary Engine Starting Motor - Inspect
3512B Marine Auxiliary Engine Speed Sensor - Clean/Inspect
C15 On-Highway Engine Belt Tensioner
2013/08/21 Improved Software for Caterpillar Digital Voltage Regulator (CDVR) Now Available {4467, 7620}
C15 and C18 Petrolem Generator Set Engines Coolant Contains Oil
Main Termination Blocks on Gensets{7553} Main Termination Blocks on Gensets{7553}
3524B and C175 Engines for Off-Highway Truck/Tractors Engine Design
C11 and C13 Engines and 14M and 16M Motor Graders Retarder - Test
TH48-E70 Petroleum Transmission and TH48-E70-C27I, TH48-E70-C32I and TH48-E70-C32P Petroleum Power Train Packages Torque Converter Housing
TH48-E70 Petroleum Transmission and TH48-E70-C27I, TH48-E70-C32I and TH48-E70-C32P Petroleum Power Train Packages Torque Converter
C175-16 and C175-20 Generator Set Engines Oil Pump
C4.4 Industrial Engine Fuel Injection Nozzles
TH48-E70 Petroleum Transmission and TH48-E70-C27I, TH48-E70-C32I and TH48-E70-C32P Petroleum Power Train Packages Transmission Hydraulic Control
C15 On-Highway Engine Engine Oil Cooler
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.