CAB AR-ENCLOSED ROPS 3329786 - Caterpillar

CLUTCH BRAKE CONSTRUCTION
20-Bearing cage. 21-Locating pin. 22-Plate. 23-Bearing cage support. 24-Hub. 25-Spring. 26-Stud. 27-Spring.The clutch brake is actuated by the clutch pedal. The farther the pedal is depressed, after the clutch is fully released, the more the brake is applied.As release bearing cage (20) moves toward the flywheel, it draws brake plate (22) toward the flywheel by means of two spring-loaded studs (26). The brake plate moves toward the flywheel on locating pins (21), partially compressing springs (27) and clamping brake hub (24) between the brake plate and bearing cage support (23).As the brake plate contacts the brake hub, further depressing of the clutch pedal will compress spring (25), thus exerting pressure against the brake hub. Since the brake hub is splined to shaft (14), the shaft and also the transmission gears are slowed down accordingly or stopped entirely to facilitate gear shifting. Braking effort is limited by the spring load.Flywheel Clutch Lubrication
Oil from the engine lubricating system is supplied to the flywheel through line (7) from the lower section of the diesel engine oil pump. The oil travels through a passage in flywheel housing (1) and enters flywheel (2) through an annular groove cut into the outer diameter of the flywheel hub. Drilled passages (6) carry the oil through the flywheel. Oil thrower (3), on the clutch side of the flywheel, directs the oil to the inner diameter of clutch hub (4).
FLYWHEEL OIL CLUTCH LUBRICATION
1-Flywheel housing. 2-Flywheel. 3-Oil thrower. 4-Hub. 5-Cup. 6-Drilled passage. 7-Oil supply line. 8-Oil return line. 9-Holes. 10-Opening. 11-Clutch cover plate. 12-Brake support plate.Slots in the hub direct the oil flow radially across the clutch friction surfaces. Holes (9) in the outer edge of the flywheel and cutouts in clutch cover plate (11) allow oil to be thrown against the walls of the flywheel housing. The flywheel acts as a slinger and directs oil toward opening (10) in the bottom of the flywheel housing. Oil from the bottom of the housing is directed through a passage in the flywheel housing to line (8). The oil flows through the line to the scavenge pump section of the diesel engine oil pump where it is returned to the diesel engine crankcase.Part of the oil thrown onto the inside of the clutch housing is directed down to the clutch brake by two ribs which are cast into the top inside surface of the clutch housing. The oil drains into a cup (5) cast into the top of brake support (12). The cup acts as a catch basin and directs oil to all parts of the clutch brake. After lubricating the brake, the oil drains to the bottom of the flywheel housing where it is picked up and returned to the engine oil sump.
FLYWHEEL HOUSING
7-Oil supply line. 8-Oil return line. 10-Opening. 13-Holes.Holes (13) in the flywheel housing permit oil to travel between the flywheel housing and diesel engine crankcase.Because all parts of the flywheel clutch are splash-lubricated, no external lubrication of the release bearing or pilot bearing is