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Massey Ferguson 230, 235, 240, 245, 250 - Engine clutch

MF 230, 235, 240, 245, 250 Tractors Repair Operations

Adjustment

Massey Ferguson 230, 235, 240, 245, 250 tractors may be equipped with a flywheel mounted dual stage clutch which permits continuous (live) pto or with a split torque clutch with independent pto.

Adjustment for Models MF 230, 240, 250 - Clutch pedal free travel is measured between top of clutch pedal shaft and bottom of footrest spacer. Free travel should be 11 mm (7/16 inch). If incorrect, loosen clamp bolt, then insert a punch into hole of release shaft and rotate shaft until clutch release bearing contacts clutch levers (resistance is felt). Move pedal until desired free travel is obtained, then tighten clamp bolt. Adjustment for Models MF 235, 245 - Clutch pedal free travel is measured at between clutch shaft arm and transmission housing. Free travel should be 4 mm (5/32 inch). If incorrect, loosen clamp bolt and rotate clutch release shaft until throwout bearing just contacts clutch fingers. Move pedal until correct free travel is obtained, then tighten clamp bolt. The length of pedal linkage rodshould be measured from center to center and adjusted to the following lengths as necessary. Early Style (Pedal Pushes Downward): Dual Stage Clutch (Orchard Models) - 295.3 mm (11-5/8 in.), Dual Stage Clutch (All Other Models) - 308 mm (12-1/8 in.), Split Torque Clutch (All Models) - 298.5 mm (11-3/4 in.). Late Style (Pedal Pushes Forward): Dual Stage Clutch (All Models) - 295.3 mm (11-5/8 in.), Split Torque Clutch (All Models) - 285.8 mm (11-1/4 in.).

Tractor split

Detach engine from transmission assembly, disconnect battery cables and remove battery. Remove hood and instrument panel lower covers. Install wedge blocks between axle and axle support to prevent tipping. Remove front weights if so equipped. Disconnect wiring from starter, alternator, temperature gage sending unit, fuel gage sending unit and headlights, then pull all wires out of the way. Disconnect throttle rod, fuel shut-off cable, engine oil pressure gage line, tachometer cable, air cleaner hose and ground strap. On models so equipped, disconnect hydraulic oil lines, power steering lines, drag links, radius rods and/or horizontal mufller. On all models, remove screws attaching the rear fuel tank mounting bracket and block tank up using a wooden block. On Massey Ferguson 230, 235, 240, 245, 250 models with steering drag links, secure drag links so wheels are straight and will not turn. Support engine and transmission independently so engine and front system can be moved forward away from transmission. Remove screws securing engine to transmission housing, remove starting motor and install guide studs. Carefully move engine and front assembly forward. When rejoining tractor, be sure to use a guide stud in each side of transmission housing to assist in alignment. Turn flywheel to align clutch plate splines with transmission and pto input shaft splines. When engine and transmission flanges meet, install retaining cap screws and remove guide studs. Do not use cap screws to force units together as damage to clutch and transmission may result. Complete installation by reversing the splitting procedure. Check clutch linkage adjustment.

Dual clutch remove and reinstall

Separate engine from transmission. Punch mark the clutch cover, pressure plate, drive plate, pressure plate and engine flywheel so parts can be reinstalled in their original positions. Install the three special bolts and tighten nuts to compress clutch springs. Three 1/4 inch UNC cap screws that are 2-1/8 inches (54 mm) long can also be used instead of special T bolts to compress clutch springs. Remove retaining cap screws and lift clutch assembly from flywheel. Reinstall clutch, first position transmission friction disc in flywheel with hub side facing away from flywheel. Position air ring on flywheel if so equipped. Use a suitable pilot shaft to align clutch discs and install clutch assembly while aligning previously made assembly punch marks. Tighten retaining cap screws to 41 Nm (30 ft.-lbs.) torque. Remove T bolts and pilot shaft. Adjust clutch, if necessary.

Overhaul - Before disassembling clutch, punch mark the clutch cover, pto pressure plate, drive plate and transmission pressure plate so parts can be reassembled in the same relative positions. Unhook release lever torsion springs. Back off T bolt nuts until pivot pin retainer pins, early style clutch, can be driven free of pivot pins. Do not attempt to drive retaining pins completely out of cover. On late style clutches, remove retaining clips from release lever pivot pins. On MF 230, 235, 240, 245, 250 models, remove pivot pins and lever springs. Disconnect release levers from links. Loosen T bolt nuts evenly to release spring pressure, then remove T bolts and separate clutch components. Thoroughly clean and examine all parts for wear or damage. Renew any parts which are questionable. Flywheel friction surface may be resurfaced up to a maximum depth of 1.0 mm (0.040 inch). An equal amount of material must also be removed from clutch mounting surface of flywheel to maintain correct clutch spring tension. It is not permissible to resurface pressure plates or drive plate. Insulating washen; should be renewed when new springs are installed.

Reassemble, place clutch cover upside down on bench, then center Belleville spring in cover with convex side up. Place pressure plate on spring aligning assembly punch marks. Install pto clutch disc with hub side down. Install pto drive plate aligning assembly marks, then temporarily hold drive plate and clutch cover together using three 5/16x1-1/2 inch bolts through flywheel mounting holes. Reinstall links, levers and retaining pins on main pressure plate making certain head of pin is positioned cover assembly onto coil springs guiding release levers through holes in cover. Make sure the assembly punch marks are all aligned. Install release lever springs. Install the "T" bolts and tighten forcing nuts evenly to compress clutch springs until release lever pivot pins can be installed. Hook torsion springs into recesses in clutch cover. Remove the three bolts securing clutch cover to pto drive plate. Reinstall clutch and check adjustment.

Adjustment - After clutch assembly has been installed on flywheel, two adjustments are necessary for proper clutch operation. Proceed as follows: Clutch assembly must be installed with a new primary friction disc, even if a partially worn disc is to be reinstalled, to obtain accurate adjustment of clutch. Check the clearance between head of pto clutch adjusting screws and surface of pto pressure plate. Adjust the screws as required to provide 1.98-2.08 mm (0.078-0.082 inch) clearance. Adjust release lever adjusting screws as required so distance from top of each screw Lo inner lip of flywheel is 82.55-83.31 mm (3.250-3.280 inches). Be sure all screws are adjusted evenly.

Split torque clutch

Remove and reinstall - Separate Massey Ferguson 230, 235, 240, 245, 250 engine from transmission. Punch mark the clutch cover, pressure plate and flywheel so original balance can be maintained when reassembling. Loosen pressure plate retaining screws evenly to prevent warping the clutch cover. Install clutch driven disc with side marked FLYWHEEL SIDE toward flywheel. The center hub will be riveted to front side of clutch disc center. Use a suitable aligning tool to align the driven disc splines and pto drive splines in cover. Align the previously affixed punch marks and tighten the retaining screws evenly to a final torque of 19-28 Nm (04-21 ft.-lbs.). Check and adjust release lever height. Adjustment - To adjust clutch lever height, turn adjusting screws as required so distance from top of each screw to inner lip of flywheel is 82.55-83.31 mm (3.250-3.280 inches). Be sure screws are adjusted evenly.

Overhaul - Disassemble the removed pressure plate cover unit, place the assembly in a press and apply only enough pressure to relieve tension on pins. Remove pins and lift off cover. Inspect release levers and pins for wear or damage and pressure plate for scoring, heat checks or wear at actuating pin boles. Pressure plate must not be resurfaced. It is permissible to resurface flywheel friction surface to a maximum depth of 1.0 mm (0.040 inch). An equal amount of material must also be removed from clutch mounting surface of flywheel to maintain correct clutch spring tension. Inspect splines in pto drive hub for wear or damage. Renew clutch springs if there are indications of heat discoloration or distortion. Reassemble by reversing the disassembly procedure making sure that assembly punch marks are aligned. Install release lever pivot pins with heads leading in direction of clutch rotation. Reinstall clutch, then adjust release lever height, if necessary.