WASHER 6R6802 - Caterpillar

Test 5. Primary Clutch Pressures
This test will show if: The clutch pressures are adjusted correctly.
Make reference to the given in Test 4.
Procedure: Use the Procedure To Manually Shift The Transmission With The Engine Running (Drive Axles Removed) given in Test 4.
Make sure the drive axles on the machine are removed for this test or the clutches of the transmission will be damaged.
1. If 6V-6064 Transmission Test Cover is used, remove small cover from the top of the transmission case. If FT1874 Transmission Test Cover is used, remove the large cover from the transmission case.2. Remove seven load piston plugs (19) from their bodies.3. Put the test cover back in position and install four bolts to hold it in place.4. At pressure taps (A), (B), (C), (E), (F), (G) and (H), connect pressure gauges [1000 kPa (145 psi)] to the nipples.5. Start and run the engine at LOW IDLE rpm in NEUTRAL.6. Make a record of the pressures on the gauges. Use the Primary Clutch Pressure Measurement chart to record measurements.7. Use the .25 (1/4) inch square drive ratchet and extension. Move the transmission rotary selector spool to REVERSE position.8. Make a record of the pressures on the gauges. Use the Primary Clutch Pressure Measurement chart to record measurements.9. Manually shift the transmission into all forward speeds and make a record of the pressures on the gauges for each shift.10. Stop the engine with the transmission rotary selector spool in NEUTRAL.11. Make a comparison of the actual primary clutch pressure, recorded on the Primary Clutch Pressure Measurement chart and the specification for each clutch given in the Primary Clutch Pressure Specifications chart.12. After the problem is corrected, remove the pressure gauges and test cover. Install load piston plugs (19).13. Install large cover, small cover and the solenoid guard. Connect the wiring harness to the solenoids.
Pressure Control Group
(9), (10), (11), (12), (13), (14) and (15) Modulation reduction valves. (16) Selector piston plugs (seven). (17) Load piston orifice (seven). (18) Decay orifice plug (five). (19) Load piston plug (seven). (20) Spring [inner (six)]. (21) Spring [outer (seven)]. (22) Shims (seven places). (A), (B), (C), (D), (E), (F), (G) and (H) Pressure taps (also load piston body identification). Problem 1:Pressure at one clutch is 0 kPa (0 psi). Probable Cause:Selector piston plug (16) is not installed. Problem 2:Primary pressures at all clutches are 0 kPa (0 psi). Probable Cause:Pilot pressure. Do Test 3. Problem 3:Primary pressures at all clutches are too low. Probable Cause:Pilot pressure. Do Test 3. Problem 4:Primary pressure at one clutch is too low. Probable Cause:Add shims (22) for the modulation reduction valve of the clutch that has low pressure. See "Shim Chart Pressure Control Group". Problem 5:Primary pressure at one clutch is too high. Probable Cause:Remove shims (22) for the modulation reduction valve that has high pressure. See "Shim Chart For Pressure Control Group". Problem 6:An additional clutch gets pressure oil in some speeds (too many clutches are engaged). Probable Cause:a. A selector piston is stuck