5007696 EVINRUDE PISTON & RING Assy, Port - Standard

MARINE TRANSMISSION SCHEMATIC (Clutch Rear Section Engaged)
1. Clutch rear section. 2. Clutch front section. In the information that follows, the clutch rear section is given the name "forward clutch", and the clutch front section is given the name "reverse clutch".Power Flow
POWER FLOW COMPONENTS
1. Oil pump. 2. Ring gear. 3. Reverse shaft. 4. Transfer gear. 5. Forward shaft. 6. Transfer gear. 7. Forward clutch. 8. Reverse clutch. 9. Spider. 10. Output shaft. 11. Rubber blocks. 12. Output flange. 13. Planet gears. 14. Sun gear and shaft. 15. Reverse gear. 16. Countershaft. 17. Forward gear.Power Flow Forward Drive
Power flow in the FORWARD position is as follows: The power from the engine comes from the flywheel to the rubber blocks, which are fastened to the spider. The power moves from the spider to forward clutch (7) and is sent through the clutch discs and plates to forward shaft (5). The forward shaft turns transfer gear (6), which is held to the forward shaft by a key. Power goes from the transfer gear to forward gear (17). The forward gear is held to countershaft (16) by a key. The forward gear turns the countershaft. Splines connect sun gear and shaft (14) to the inside of the countershaft. The countershaft turns the sun gear and shaft. The sun gear turns planet gears (13) around stationary ring gear (2). The movement of the planet gears turn the output shaft. Splines connect the output shaft to output flange (12). The output shaft turns the output flange. The output flange sends the power to the propeller shaft.
FORWARD DRIVE SCHEMATIC
2. Ring gear. 5. Forward shaft. 6. Transfer gear. 7. Forward clutch. 12. Output flange. 13. Planet gears. 14. Sun gear and shaft. 16. Countershaft. 17. Forward gear.Power Flow Reverse Drive
REVERSE DRIVE SCHEMATIC
2. Ring gear. 3. Reverse shaft. 4. Transfer gear. 8. Reverse clutch. 12. Output flange. 13. Planet gears. 14. Sun gear and shaft. 15. Reverse gear. 16. Countershaft. 18. Idler gear.Power flow in the REVERSE position is similar to the FORWARD position. Power comes from the engine flywheel through the rubber blocks and spider to reverse clutch (8). Power goes through the clutch discs and plates to reverse shaft (3). The reverse shaft is on the inside of the forward shaft. The reverse shaft turns transfer gear (4), which is held to the reverse shaft by a key. The transfer gear turns idler gear (18). The idler gear changes the direction of rotation and turns reverse gear (15). The reverse gear is held to countershaft (16) by a key. The reverse gear turns the countershaft. The power goes to the propeller shaft in same manner as in the FORWARD position only in the opposite direction.Hydraulic System
Oil pump (1) sends a supply of hydraulic oil to the control valve. The control valve positions, FORWARD and REVERSE, send the oil under pressure to engage either the forward clutch or the reverse clutch. With the control valve in the FORWARD position, the hydraulic oil moves through the oil passage around the tube in the hollow center of shaft (3). The oil through the shaft flows through passage (7), in the spider assembly, and passage (8), in the clutch ring, to dump valve (11).
MARINE TRANSMISSION CUTAWAY
1. Oil pump. 2. Tube assembly (hydraulic oil passage to reverse clutch). 3. Shaft (hydraulic oil passage, around tube, to forward clutch). 4. Dump valve (for reverse clutch). 5. Reverse clutch. 6. Hydraulic oil passage in spider assembly (to reverse clutch dump valve). 7. Hydraulic oil passage through spider assembly. 8. Hydraulic oil passage through clutch ring (to forward clutch dump valve). 9. Forward clutch. 10. Engaging piston for forward clutch. 11. Dump valve (forward clutch).
DUMP VALVE
12. Plunger (removed from body).The pressure oil in dump valve passage (14) moves plunger (12) toward the clutch. Plunger (12) was held away from the clutch by centrifugal force caused by clutch rotation. The down position of plunger (12) lets the pressure oil flow through valve passage (13), which goes directly to engaging piston (10) of the forward clutch. The pressure oil moves and holds piston (10) against the plates of the forward clutch and the clutch is engaged.
DUMP VALVE OPERATION (Clutch Engaged Position)
12. Plunger. 13. Passage (to clutch piston). 14. Inlet passage.With the control valve in the REVERSE position, the hydraulic oil moves through tube assembly (2), through hydraulic passage (6) in the spider assembly which goes to the dump valve (4) for the reverse clutch. The dump valve sends the pressure oil to the piston for the reverse clutch, which engages the reverse clutch. Dump valve (4) is same as dump valve (11) and operates in the same way to engage or release the clutch.
DUMP VALVE OPERATION (Clutch Not Engaged)
12. Plunger. 13. Passage (to clutch piston). 15. Outlet passage.When the control valve is moved to NEUTRAL position, oil is not sent to a clutch. With no oil pressure to hold plunger (12) toward the clutch, the centrifugal force caused by clutch rotation moves plunger (12) out. This opens oil passage (13) to a clutch piston and to outlet passage (15). As the oil from the piston goes through the outlet passage, springs in piston and cylinder assembly move the piston away from the clutch plates and the clutch releases.Control Valve in Neutral
CONTROL VALVE (Neutral Position)
1. Control valve body. 2. Directional spool valve. 3. Springs. 4. Port to oil cooler. 5. Oil inlet port. 6. Relief valve. 7. Check valve.The control valve is fastened at the rear of the marine transmission. This valve sends and controls the flow of oil to the transmission. The pressure control section of the valve gives automatic control of the pressure, with a slight delay effect to give a smooth flow of power as it goes from NEUTRAL to either FORWARD or REVERSE.With the engine running and the directional valve (2) in the NEUTRAL position, the oil flow through the control valve is as follows:Oil flows from the filter to inlet port (5), around the stem of relief valve (6) and through a