Here are the data, specifications, dimensions, tolerances and the main tightening torque settings for the 4 cylinder Standard 23C engine as fitted to the MF35. These specifications accompany the MF35 Engine Rebuild DVD, which details every aspect of rebuilding the 4 cylinder Standard Motor Company 23C diesel engine as fitted to these tractors.


Data Specifications

Cylinders 4
Bore 3 5/16”
Stroke 4”
Displacement 137.89 cu ins.
Compression Ratio 20:1
Firing Order 1,3,4,2
Power 37.25 bhp
Belt Power 35.9 bhp
Crankshaft Torque 100 lb.ft at 1600 rpm

Tightening Torques lbs./ft

Connecting Rod Bolts 65-70
Cylinder Head-Manifolds 22-24
Injectors 12-14
Cylinder Head Attachment to Block 100-105
Exhaust Pipe Attachment 22-24
Flywheel Attachment 90-100
Injector Clamp 18-20
Timing Cover 18-20
Timing Chain Tensioner Attachment 8-10

Dimensions and Tolerances(Ins)

Similar tolerances for re-ground crankshaft to 0.010,0.020,0.030,0.040 undersize.

Big End Crankpin Dia. 2.3115 – 2.3110
Big End Bearing Bore Dia. 2.3145 – 2.2135

Small End

Bush Internal Diameter 1.1248 – 1.1252

Similar tolerances for re-ground crankshaft to 0.010,0.020,0.030,0.040 undersize.

Crankshaft Journal Diameters 2.7520 – 2.7515

Crankshaft End Float

Clearances 0.117 – 0.0048
Rear Journal Length 1.7507 – 1.7498
Rear Bearing Housing Width 1.559 – 1.557
Thrust Washer Thickness 0.093 – 0.091

Main Bearing Housings

Front, Housing Spigot Ext. Dia. 5.0615 – 5.0605
Front, Bore in Cylinder Block 5.0635 – 5.0620
Centre, Housing Spigot Ext. Dia. 6.8115 – 6.8105
Centre, Bore in Cylinder Block 6.8140 – 6.8120
Rear, Housing Spigot Ext. Dia. 6.8740 – 6.8730
Rear, Bore in Cylinder Block 6.8765 – 6.8746

Cylinder Liners And Piston Rings

Stand Out of Cylinder Liner
Above Cylinder Block 0.004 – 0.001
Piston Ring Gap 0.17 – 0.12
1st Ring Gap 0.09 – 0.17
2nd and 3rd Ring Gaps 0.009 – 0.14
Scraper Ring Gap 0.015 – 0.010

Camshaft

Dia. of Front Camshaft Journal 1.5595 – 1.5590
Dia. of Centre and Rear Journals 1.6845 – 1.6840
Camshaft End Float 0.004 – 0.008

Valves and Guides

Inlet. Dia. of Inlet
Valve Guide 0.3130 – 0.3120
Inlet. Dia. of
Inlet Valve Stem 0.3112 – 0.3107
Exhaust. Inside Dia. of
Exhaust valve Guide 0.3755 – 0.3745
Exhaust. Dia. of Exhaust
Valve Stem 0.3732 – 0.3727
Inlet. Working Valve Tip
Clearance (Cold) 0.012
Exhaust. Working Valve Tip
Clearance (Cold) 0.008

Valve Timing (Crankshaft Degrees)

Exhaust Opens 45.5 before B.D.C.
Exhaust Closes 10.5 after T.D.C.
Inlet Opens 10.5 before T.D.C.
Inlet Closes 37.5 after B.D.C.

These figures are taken from the Massey Ferguson 35 Service Manual. Whilst every effort has been taken to reproduce these figures accurately, no responsibility can be taken for errors.