GASKET KT- 6V1398 - Caterpillar

Table 1
Required Tools    
Part Number     Description     Quantity    
198-4240     Digital Pressure Indicator     1    
3B-6552     Elbow     1    
6V-4140     Unvalved Nipple     1    
3B-7282     Pipe Nipple     1    
6V-6064     Transmission Test Cover (1)     1    
FT1775     Transmission Test Cover (1)     1    
( 1 ) Only one type of transmission test cover is necessary.Note: Make sure that the filters and the screens are clean before you test any pressures. Make sure that the oil is at operating temperature before you perform this test.
Personal injury or death can result from sudden machine movement.Sudden movement of the machine or release of air pressure or oil pressure can cause injury to persons on or near the machine.To help prevent possible injury before testing and adjusting any air system or hydraulic system, perform the procedure in the Testing and Adjusting, "General Information" section.
This test will determine if the operation of the priority reduction valve and the setting of the priority reduction valve are correct.Procedure
Disconnect the wiring harness from the lockup clutch solenoid, the downshift solenoid, and the upshift solenoid.
Remove the solenoid guard and the large cover from the transmission case.
Illustration 1 g00650148
Transmission hydraulic control (A) Pressure tap for the pilot pressure of the transmission hydraulic control
Remove the plug from pressure tap (A) .
Install a 3B-6552 Elbow (0.125 mm (0.005 inch) NPT) in pressure tap (A). Connect a 3B-7282 Pipe Nipple (0.125 mm (0.005 inch) NPT) (152 mm (6 inch) long) with a 6V-4142 Unvalved Nipple to the elbow.
Put 6V-6064 Cover on the top of the transmission case. Use a piece of plastic or a piece of paper with the cover to prevent dirt from entering the transmission case. Use a piece of plastic or a piece of paper with the cover to prevent the spraying of oil.Alternate Step 5. Install the FT1775 Transmission Test Cover in place of the large cover. Use four bolts that are evenly spaced in order to hold the cover in place.
Connect 198-4240 Digital Pressure Indicator to the nipple at pressure tap (A) .
Start the engine. Run the engine at the low idle rpm with the transmission in NEUTRAL-1. Keep the parking brakes engaged.
The pressure on the gauge must be 1755 35 kPa (255 5 psi).
When the test is complete, stop the engine. Remove the test equipment.
Illustration 2 g00527303
(1) Priority reduction valve (2) Neutralizer valve (3) Rotary selector spool (4) Screen (5) Spacers (A) Pressure tap for the pilot oil of the transmission hydraulic control
Table 2
Chart Of Spacers For The Priority Reduction Valve (1)    
Pt. No. of the Spacers     Thickness     Change in Pressure    
5M-3492 Spacer    
0.25 mm (0.010 inch)    
17 kPa (2.5 psi)    
7M-1397 Spacer    
0.91 mm (0.036 inch)    
60 kPa (8.7 psi)    
( 1 ) Before an adjustment is made, be certain that the valve spring is not weak or broken.Use Illustration 2 and Table 2 for the