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Massey Ferguson 230, 235, 240, 245, 250 diesel engine - Service and repair

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

Remove and reinstall engine assembly

Massey Ferguson 230, 235, 240, 245, 250 tractors equipped with diesel engine use Perkins AD3.152 direct injection diesel engine. Different versions of the AD3.152 engine have been used and can be identified by the serial number suffix letters stamped on pad located near the fuel transfer pump on right side of engine. Some service procedures will differ slightly depending on whether or not there is an S in serial number suffix letters. Engines with letter C in suffix code use a one-piece lip type crankshaft rear oil seal. Engines that do not have letter C in suffix code use a two-piece rope type crankshaft rear oil seal.

Remove and reinstall engine assembly - Remove AD3.152 engine, first remove front end assembly from engine as follows: Drain cooling system. Remove hood, grille, side panels and radiator brace. Disconnect battery cables and remove the battery. Disconnect headlight wires and thread wiring rearward through the retainer clips. Disconnect radiator upper and lower hoses, oil cooler hoses and power steering hoses. Disconnect drag links from steering box pitman arms. Drive wooden wedges between front axle and axle support to prevent tipping. Remove front end weights if so equipped. Support front end assembly with a hoist. Support tractor with a jack stand under transmission housing. Remove bolts attaching axle support to front of engine, then roll front end assembly away from engine. Separate engine from transmission, proceed as follows: Shut off fuel, disconnect fuel lines and remove fuel tank. Disconnect air cleaner hose. Disconnect injection pump stop control and throttle control. Disconnect wiring from engine and starter motor. Remove starter motor and solenoid. Disconnect tachometer drive cable from MF 230, 235, 240, 245, 250 engine. Remove bolts attaching steering box side panels to rear of engine. Remove muffier (or exhaust pipe) from exhaust manifold. Support engine with a hoist, remove bolts attaching engine to transmission and carefully move engine forward from transmission. To reinstall engine, reverse the removal procedure while noting the following special instructions: Insiall an alignment stud in each side of transmission housing to assist in aligning engine to transmission. Turn nywheel to align clutch plate splines with transmission and pto input shaft splines. After engine and transmission flanges meet, install retaining bolts and nuts and tighten to 75 Nm (55 ft-lbs.) torque. Tighten front axle support mounting bolts and nuts to 235 Nm (175 ft.-lbs) torque. Check clutch linkage adjustment.

Rocker arms AD3.152 - The rocker arms and shaft assembly can be removed after removing the hood, fuel tank and rocker arm cover. The rocker arms are right-hand and left hand units and should be installed on shaft. Rocker shaft diameter is 15.81-15.84 mm (0.6225-0.6237 inch) and desired diametral clearance between shaft and rocker arms is 0.02-0.09 mm (0.0008-0.0035 inch). Renew shaft and/or rocker arms if clearance exceeds 0.13 mm (0.005 inch). The amount of oil circulating to the rocker arms is regulated by the position of the rocker shaft in the support brackets. This position is indicated by a slot in front end of shaft and should be set at approximately 30 degrees from vertical. On late production engines, shaft is positioned correctly by a dowel pin in one of the support brackets.

Timing gear cover

Remove the timing gear cover, drain the cooling system and oil pan. Remove front grille panels and disconnect battery cables. Remove fuel tank cap, radiator cap and hood. Disconnect headlight wires and pull wiring free. Disconnect both radiator hoses, radiator brace and, on models so equipped, hydraulic oil lines and front mounted pump. Support Massey Ferguson 230, 235, 240, 245, 250 tractor at front of transmission. Position wedge blocks between front axle and axle support. Support the front end assembly at front and rear. Disconnect drag links and radius rods at rear of models so equipped. On models with drag links, attach drag links to axle so wheels will be straight ahead and will not turn. On Massey Ferguson 230, 235, 240, 245, 250 tractors with power steering, disconnect lines and cover all hydraulic steering openings. Unbolt the front assembly and carefully roll away from tractor. Remove the crankshaft pulley, fan belt, water pump and alternator mounts. Unbolt and remove the timing gear cover. Press, do not pry, old seal from cover. The camshaft thrust spring is riveted to rear face of timing gear cover and controls end play of camshaft. Reinstall timing gear cover, first install a new oil seal into cover using suitable installing tool. Install timing gear cover with a new gasket on front of engine, but do not tighten mounting cap screws at this time. Lubricate lip of seal, then carefully position crankshaft pulley onto crankshaft to center seal and cover to the crankshaft. Hold cover in centered position while tightening several cover retaining cap screws. Remove crankshaft pulley, then tighten all cap screws securely. Reinstall crankshaft pulley and tighten retaining cap screw to 142 Nm (105 ft-lbs.) torque. Complete installation by reversing the removal procedure.

Timing gears - Before attempting to remove any of the timing gears, first remove fuel tank, rocker arm cover and rocker arms assembly to avoid the possibility of damage to pistons or valve train if camshaft or crankshaft should be turned independently of the other. Timing gear backlash should be 0.08-0.15 mm (0.003.0.006 inch) between the large idler gear and any of the other gears in the timing train. Replacement gears are available in standard size only. If backlash is not within specified limits, renew the idler gear, idler gear shaft and/or any other gears concerned. Remove the timing gears or time the Massey Ferguson 230, 235, 240, 245, 250 engine, unstake and remove the idler gear retaining bolt and slip the gear off idler shaft. The idler shaft is a light press fit in timing gear housing and is further positioned by the locating pin. Pry the shaft from its place in timing gear housing if renewal is indicated. The crankshaft gear is keyed in place and fits the shaft with a transition fit, 0.025 mm (0.001 inch) tight to 0.025 mm (0.001 inch) loose. If the old gear is a loose fit, it may be possible to pry it off the shaft with a heavy screwdriver or light pry bar. If a puller is needed, it will first be necessary to remove the oil pan and small lower section of timing gear housing. The camshaft gear and injection pump drive gear can be removed by removing the retaining cap screws and withdrawing the gears. Camshaft gear - The gear is attached to camshaft by three equally spaced cap screws which thread into camshaft flange. It is possible, therefore, to install the gear in three positions, only one of which is correct. Th correctly install the gear, align the stamped letters D on camshaft hub and front face of gear. Tighten cap screws to 27 Nm (20 ft.-lbs.) torque.

Injection pump drive gear - The injection pump drive gear is retained to the pump adapter by three cap screws. When installing the gear, align dowel pin with slot in adapter bub, then install the retaining cap screws. The injection pump drive gear and adapter are supported by the injection pump rotor bearings. Idler gear - The idler gear is retained on idler shaft by a cap screw and washer. Idler gear bore diameter should be 53.98-54.02 mm (2.125-2.127 inches) and idler shaft diameter should be 53.92-53.94 mm (2.123-2.124 inches). Gear to shaft diametral clearance should be 0.04-0.10 mm (0.0016-0.0039 inch). Gear end play on shaft should be 0.13-0.38 mm (0.005-0.015 inch). When reinstalling gear, make certain all timing marks are aligned. Tighten retaining cap screw to 68 Nm (50 ft.-lbs.) torque. Timing the gears - Due to the odd number of teeth on idler gear, the timing marks will align only once in 18 crankshaft revolutions. To time the engine after the gears are removed, first install camshaft gear and the injection pump gear. Install the crankshaft gear on keyed shaft with timing mark to the front. Turn crankshaft, camshaft and injection pump until the respective timing marks point approximately toward idler gear hub; then, install idler gear aligning timing marks. Timing gear housing - Remove timing gear housing, first remove timing gear cover, then remove timing gears. Remove oil pan, fuel lift pump and injection pump. Remove power steering pump if not previously removed. Remove rocker arms and shaft assembly. Raise and secure cam followers in the fully raised position, then withdraw camshaft. Unbolt and remove timing gear housing. Reinstall by reversing the removal procedure.

Camshaft and connecting rods

Remove the camshaft, first remove timing gear cover. Remove fuel tank, rocker arm cover and rocker arms and shaft assembly. Raise and secure cam followers in their uppermost position. Remove fuel lift pump, then withdraw camshaft. The camshaft runs in three journal bores machined directly in Massey Ferguson 230, 235, 240, 245, 250 engine block. The front and rear camshaft bearings are gravity lubricated by return oil from the rocker arms. The center journal is pressure lubricated by an external oil line. The center journal, in turn, meters oil to the rocker shaft and cylinder head through a second short oil feed line. Inspect camshaft lobes and bearing journals for excessive wear, scoring, pitting or other damage and renew if necessary. Recommended bearing journal diametral clearance in cylinder block bores is 0.10-0.20 mm (0.004-0.008 inch). It is recommended that cam followers also be renewed if camshaft is renewed. Camshaft end play is controlled by the leaf-type spring riveted to rear face of timing gear cover. Camshaft specifications are as follows: Journal Diameter - Front - 47.47-47.50 mm (1.869-1.870 in.), Center - 47.22-47.24 mm (1.859-1.860 in.), Rear - 46.71-46.74 mm (1.839-1.840 in.). Cylinder Block Bore Diameter - Front - 47.60-47.67 mm (1.874-1.877 in.), Center - 47.35-47.42 mm (1.864-1.867 in.), Rear - 46.84-46.91 mm (1.844-1.847 in). Reinstall camshaft, reverse the removal procedure. If camshaft gear was removed, be sure stamped letters on gear and camshaft flange are aligned. Tighten gear retaining cap screws to 27 Nm (20 ft.-Ibs.) torque.

Connecting rods and bearings - Connecting rod bearings are precision type, renewable from below after removing oil pan and bearing caps. When renewing bearing shells, be sure the projection engages milled slot in rod and cap and that the correlation numbers on rod and cap are in register and face away from camshaft side of engine. Replacement rods should be marked with the cylinder number in which they are installed. Bearings are available in standard, as well as 0.25, 0.50 and 0.75 mm (0.010, 0.020 and 0.030 inch) undersizes. Connecting rod bearing diametral clearance should be 0.06-0.10 mm (0.0025-0.0040 inch). Recommended connecting rod side clearance is 0.24-0.50 mm (0.010-0.020 inch). Manufacturer recommends renewing connecting rod cap bolts and nuts whenever they are removed.

Crankshaft and bearings

The crankshaft is supported in four precision type main bearings. To remove crankshaft, drain engine oil. Remove Massey Ferguson 230, 235, 240, 245, 250 engine. Remove oil pan, timing gear cover and lower cover from timing gear case. Remove engine oil pump. Remove clutch, flywheel, engine adapter plate and crankshaft rear oil seal. Remove connecting rod bearing caps and main bearing caps, then lift crankshaft from cylinder block. The upper and lower halves of the front main bearing insert are not interchangeable with other bearings or with each other. The four insert halves of the second and third main bearings are all alike. The upper and lower halves of the rear main bearing are alike, but not interchangeable with other bearing inserts. Main bearing inserts are available in standard size and 0.25, 0.50 and 0.75 mm (0.010, 0.020 and 0.030 inch) undersizes. Crankshaft end play is controlled by renewable thrust washers at front and rear of rear main bearing. The cap half of thrust washer is prevented from turning by the tab which fits in a machined notch of cap. Block half of washer can be rolled from position when cap is removed. Recommended crankshaft end play is 0.05-0.38 mm (0.002-0.015 inch). Thrust washers are available in 0.18 mm (0.007 inch) oversize as well as standard thickness. One set (top and bottom) of oversize thrust washers may be installed on one side (front or rear) in combination with standard size set at other side to provide oversize adjustment of 0.18 mm (0.007 inch). Two sets of oversize thrust washers may be used to provide adjustment of 0.36 mm (0.014 inch). Crankshaft balance weights are available only in matched pairs because maximum variation between weights must be less than 28 grams (1 ounce). Tighten weight retaining cap screws to 68-75 Nm (50·55 ft.-lbs.) torque, then bend lock tabs to lock screws in place.

Check crankshaft against the standard sizes listed below: Main Joumal Diameter - 69.81-69.83 mm (2.7485-2.7492 in.). Crank pin Diameter - 57.11-57.13 mm (2.2485-2.2492 in). Main Bearing Clearance MF 230, 235, 245 - 0.08-0.13 mm (0.003-0.005 in.). Main Bearing Clearance MF 240, 250 - 0.05-0.10 mm (0.002-0.004 in.). Rod Bearing Clearance - 0.06-0.10 mm (0.0025-0.0040 in.). Crankshaft End Play - 0.05-0.38 mm (0.002-0.015 in.). To reinstall crankshaft, reverse the removal procedure. Note that main bearing caps are numbered 1 through 4 with number 1 cap at front of engine. The caps are also marked with a serial number which corresponds with and must be in line with serial numbers stamped on bottom of cylinder block. Make certain thrust washers are installed with grooved side towards crankshaft. Tighten main bearing cap screws to 150 Nm (110 ft-lbs.) torque.

Crankshaft rear oil seal

Rope type rear - The rope type rear oil seal is contained in a two-piece retainer attached to rear face of cylinder block. The rope seal is cut to correct length and should be installed in retainer halves with 0.25-0.50 mm (0.010-0.020 inch) of the seal protruding from each end of retainer. Do not trim ends of seal. To install the seal, clamp each half of retainer in a vise. Make sure seal groove is clean. Start each end of seal in groove with the specified amount of free end protruding. Allow seal rope to buckle in the center until about 25 mm (1 inch) of each end is bedded in groove, work center of seal into position, then roll with a round bar. Repeat the process with the other half of seal. Install seal retainer as follows: Clean sealing surfaces of block, bearing cap and seal retainers. Coat both sides of retainer gasket and end joints of retainer halves with a suitable gasket cement. Coat surface of rope seal with engine oil. Assemble retainer halves around crankshaft and install cap screws loosely. Be sure that retainer half with oil return slot is toward bottom of engine. Tighten the two long cap screws with nuts to 8 Nm (6 ft.-lbs.) torque, then tighten cap screws to cylinder block and bearing to 16 Nm (12 ft.-lbs.). Finish by tightening the two long cap screws and nuts to final torque of 16 Nm (12 ft.-lbs.).

Lip type seal - The lip type rear oil seal is contained in a one-piece retainer which is attached to rear of cylinder block. When renewing seal, inspect crankshaft flange for wear in seal contact area. If flange is grooved, seal should be pressed further into retainer so seal lip will contact area of flange that is not worn. The crankshaft seal surface may be machined, if necessary, to smooth seal surface. Make certain seal is pressed squarely into retainer. Lubricate seal lip and crankshaft flange prior to installing seal. Tighten retainer cap screws to 18 Nm (14 ft.-lbs.) torque.

Flywheel - To remove the flywheel, first separate the engine from transmission housing and remove the clutch. Flywheel is secured to crankshaft flange by six evenly spaced cap screws. To properly time flywheel to engine during installation, be sure that unused hole in flywheel aligns with untapped bole in crankshaft flange. On Massey Ferguson 230, 235, 240, 245, 250 models, shims may be installed between the crankshaft and flywheel. Check for these shims upon disassembly to prevent loss or damage. Be sure shims are reinstalled when flywheel is installed. The starter ring gear can be renewed after flywheel is removed. Heat new ring gear to 245C (475F). Do not overheat as gear heat treatment could be destroyed. Install gear on flywheel with beveled end of teeth facing forward. Allow gear to air cool. Reinstall flywheel and tighten mounting cap screws to 106 Nm (78 fl-lbs.) torque. Check flywheel runout with a dial indicator after flywheel is installed. Runout measured at machined surface of outer diameter must not exceed 0.30 mm (0.012 inch). Runout measured at clutch surface must not exceed 0.025 mm (0.001 inch) for each 25 mm (1 inch) from flywheel centerline to point of dial indicator measurement. If runout is excessive, remove flywheel and check for burrs or foreign material.

Oil pan - The cast iron oil pan serves as part of MF 230, 235, 240, 245, 250 tractor frame and as attaching point for tractor front support. To remove oil pan, first drain engine oil. Support tractor under transmission housing, then remove front axle and support housing assembly. Support oil pan, remove retaining cap screws and lower pan from cylinder block. Reinstall, reverse the removal procedure. Oil pump - The rotary type oil pump is mounted on front main bearing cap and driven from the crankshaft timing gear through an idler. Remove the oil pump, first remove oil pan. Disconnect oil delivery pipe from cylinder block and oil suction pipe from main bearing cap. Unbolt and remove the front main bearing cap with oil pump attached. Pump can be unbolted from main bearing cap after removing idler gear. Check rotor clearance with a feeler gage. Clearance should be 0.01-0.06 mm (0.0005-0.0025 inch). Outer rotor to body clearance should be 0.028-0.033 mm (0.011-0.013 inch). Inner rotor end clearance should be 0.04-0.08 mm (0.0015-0.0030 inch) and outer rotor end clearance should be 0.01-0.06 mm (0.0005-0.0025 inch). If pump rotor or body are worn, scored or damaged, pump assembly must be renewed. Remove oil pressure relief valve spring and plunger from pump body. Inspect plunger and bore in pump body for wear or scoring and renew if necessary. Oil pressure should be 345445 kPa (50-65 psi) at high idle speed with engine at normal operating temperature. If oil pump drive gear was removed, press gear onto shaft, with flat face of gear outward, until face of gear is flush with end of shaft. Reinstall pump by reversing the removal procedure. Tighten main bearing cap screws to 150 Nm (110 ft-lbs.) torque.