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Diesel engine
Bore: nominal 79.51 mm 1st repair size 79.76 mm 2nd oversize 80.01 mm Valve Guides The inner diameter of 8,013-8,035 mm plugs The clearance of the valve stems of 1.3 mm (see. Text) Valve seats:
| Fig. 397. Check the indicator of the gap of the valve stem in the valve guide
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inlet valves 35,70 mm exhaust valves 31,40 mm The angle of the valve seat 45 ?� The width of the valve seat (dimension "c", see. Fig. 397): intake valves 2.7mm exhaust valves 1.6 mm External correction angle 15 ?� Valves The diameter of the valve disc: inlet valves 35,95 mm exhaust valves 31.45 mm The length of the valve 96.85 The diameter of the valve stem: intake valves 7.97 mm exhaust valves 7.95 mm The thickness of the edge of the valve is not less than 0.5 mm
| Fig. 399. The depth measurement with a valve seat to further processing (indicated by arrows)
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inlet valves 35.7 mm exhaust valves 31.4 mm Pistons Meas piston diameter of 10.0 mm from the bottom of the piston skirt at an angle of 90 ?� to the piston pin axis Bore: nominal diameter of 79.48 mm 1st repair size 79.73 mm 2nd oversize 79.98 mm Max. wear limit of 0.04 mm piston The clearance of the pistons: normal 0.03 mm the legal limit of 0.07 mm The gap between the piston rings and grooves: compression (top) 0,06-0,09 mm compression (average) 0.05-0.08 mm scraper 0.03-0.06 mm maximum allowable (compression) 0.25 mm maximum allowable (scraper) 0.15 mm Heat the gap: Normal - Compression piston rings 0.20 - 0.40 mm normal - scraper ring 0.25 - 0.50 mm the legal limit of 1.0 mm Location locks piston rings Every 120 ?� The diameter of the piston pin 26.0 mm Cranks Axial bearing clearance 0.05 - 0.31 mm Limits 0.37 mm Crankshaft The number of main bearings 5 Designation main bearing 1 to 5, starting from the front of the engine Adjusting the axial clearance shims Main and connecting rod bearings Thin-walled bearing shells The axial clearance of the crankshaft: normal 0,07-0,17 mm the legal limit of 0.37 mm Main bearing clearance: normal 0.03-0.08 mm the legal limit of 0.17 mm Connecting rod bearing clearance: Normal mm 0,03-0,076 the legal limit of 0.08 mm Max. infringement of the roundness of bearing journals 0.03 mm The diameter of the neck of the crankshaft bearing (tolerance, mm): nominal diameter of 54.00 mm 1st repair 53,75 mm 2nd repair 53,50 mm 3rd Repair 53.25 mm The diameter of the connecting rod bearing journals: nominal diameter of 47.80 mm 1st Repair 47.55 mm 2nd repair 47,30 mm 3rd repair 47,05 mm The width of the bearing shells 20 mm Engine lubrication system The pressure in the lubrication system is not less than 2.0 bar [200 kPa] The minimum pressure in the lubrication system (operation control lamp) 0.15-0.75 bar [15-75 psi] The amount of oil in the engine, which must be filled with the oil change: with the change of filter 4.5 liters without filter change 4.0 l Engine cooling system The opening pressure relief valve 1.4-1.6 bar [140-160 psi] The opening pressure of the vacuum valve 0.06-0.1 bar [6-10 kPa] Switch The temperature of the inclusion of 1st stage of 92-97 ?� C Off temperature 1st stage 84-91 ?� C The temperature of the switching stage 1 99-105 ?� C Off temperature 2nd stage 91-98 ?� C Thermostat Opening temperature 85 ?� C Fully opened to 105 ?� C Stroke 7.0 mm
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