COVER 3P3726 - Caterpillar

Table 2
Transmission Speed Clutches That are Engaged In The Transmission
First Speed Forward 2 and 5
Second Speed Forward 2 and 4
Third Speed Forward 2 and 3
Neutral 3
First Speed Reverse 1 and 5
Second Speed Reverse 1 and 4
Third Speed Reverse 1 and 3 Introduction
The following test will determine the pressures that are being delivered to each individual transmission clutch.No. 1 clutch through No. 4 clutch will engage at 2875 215 kPa (402 31 psi) at LOW IDLE. The No. 5 clutch will engage at a pressure of 2422 215 kPa (351 31 psi) at LOW IDLE.Required Tools
Illustration 1 g02571852
Tooling (A) 198-4240 Digital Pressure Indicator Gp
Table 3
Required Tools
Tool Item Qty Part No Description
A 198-4240 Digital Pressure Indicator Gp
A1 1 198-4234 Digital Indicator
A2 1 198-4237 Pressure Sensor Gp
(0 to3,445 kPa (0 to 500 psi))
A3 1 198-4236 Adapter Cable As Reference: Refer to Tool Operating Manual, NEHS0818, "Using the 198-4240 Digital Pressure Indicator Group" for more information on using Tooling (A).Test Preparation
Move the machine to a smooth horizontal location.
Place the steering control lever in the NEUTRAL position.
Engage the parking brake.
Lower the attachments to the ground.
Stop the engine.
Illustration 2 g01109031
(1) Bolts
(2) Cover
Remove bolts (1) and remove cover (2) from the machine.
Illustration 3 g03388924
(CL1) Pressure Tap (No. 1 Clutch)
(CL2) Pressure Tap (No. 2 Clutch)
(CL3) Pressure Tap (No. 3 Clutch)
(CL4) Pressure Tap (No. 4 Clutch)
(CL5) Pressure Tap (No. 5 Clutch)
Attach Tooling (A) to pressure tap (CL2) and Tooling (A) to pressure tap (CL5). Pressure tap (CL2) is for No. 2 Clutch (FORWARD). Pressure tap (CL5) is for No. 5 Clutch (FIRST SPEED).
Run the hydraulic hoses from tooling (A) into the cab. Test Procedure
Start the engine. Warm the power train oil to a minimum temperature of 84° 8°C (183° 14°F).
Operate the engine at LOW IDLE. Move the machine with the steering control lever in the FIRST SPEED FORWARD position.
Check the pressure at Tooling (A) for the No. 2 clutch. The pressure at Tooling (A) for the No. 2 clutch should be 2875 215 kPa (402 31 psi).
Check the pressure at Tooling (A) for the No. 5 clutch. The pressure at Tooling (A) for the No. 5 clutch should be 2422 215 kPa (351 31 psi).
Use Table 1 in order to check all of the other combination of clutches. Record the pressure measurements in Table 2.