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OM600 ENGINE MECHANICAL 1B3-129
Tools Required 001 589 32 21 00 Dial Gauge Checking and Machining
1. Clean the valves and do visual check.Valves with wobbled valve disc, with worn or scored valve stem should be replaced.
2. Measure valve disc height ‘h’.
Service data
Intake
Exhaust 1.7 ± 0.15 mm 1.7 ± 0.15 mm
3. Machine the valve. Notice Pay attention to setting angle ‘ ’ .
Commercial Tool
Valve corn grinding machine
4. Measure radial runout between valve stem and valve seat.
Limit Max. 0.03mm
Dial Gauge 001 589 32 21 00
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1B3-138 OM600 ENGINE MECHANICAL
6. Check the timing.New
After approx. 20,000km ATDC 11.33
°
ATDC 12 °
Notice If timing is out standard, the camshaft should be checked for wear and the timing chain for stretch. If a difference of more than 4 ° exists, the timing chain should be replaced.
7. Replace the gasket and install the cylinder head cover.
Tightening Torque 10 Nm
Measurement Procedure
1. Remove the cylinder head cover.
2. Rotate the engine in the direction of engine rotation until the intake valve of NO. 1 cylinder is completely closed. The cam lobe faces up (arrow). Notice Do not rotate the engine at the bolt of the crankshaft sprocket. Do not rotate the engine in the opposite directionof engine rotation. If do, this will cause serious measuringerrors.
3. Install the dial gauge holder and dial gauge (7) with theextension (8) to the cylinder head and position the tracer pin (9) onto the valve tappet (intake valve of cylinder NO.1)with a preload of min. 3mm. Notice The tracer pin should be positioned exactly vertical.
Dial gauge Holder 363 589 02 21 00Dial Gauge 001 589 53 21 00Extension 366 589 00 21 05
4. Set the dial gauge to ‘0’.
5. Rotate the engine further in direction of rotation until the dial gauge has moved back by 2mm (valve lift) to 1mm.
Tools Required 001 589 53 21 00 Dial Gauge363 589 02 21 00 Dial Gauge Holder366 589 00 21 05 Extension
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OM600 ENGINE MECHANICAL 1B3-139
CAMSHAFT Preceding Work : Removal of cylinder head cover
1 Bolt............................................................ 25Nm
2 Washer
3 Camshaft Bearing Cap
4 Camshaft
5 Dowel Pin
6 Locking Washer
7 Timing Chain 8 Cylinder Head
9 Oil Pan
10 Camshaft Sprocket
11 Washer
12 12-Sided Bolt (M11) ... ..........Check, 25Nm + 90 °
13 Gasket ................................................... Replace
14 Chain Tensioner ........................................ 80Nm
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1B3-142 OM600 ENGINE MECHANICAL
4. Install the camshaft bearing caps according to markings(1,2, 3 etc.).
7. Remove the camshaft bearing cap.
8. Pull off the camshaft.
Notice
Be careful not to miss front locking washer.
9. Pull out the locking washer.Notice Check the condition of locking washer and replace if
necessary.
Installation Procedure
1. Insert the locking washer.
2. Check the valve tappet and ensure that tappet moves smoothly.
3. Coat the camshaft with oil and install the camshaft onto the cylinder head so that the TDC marking (arrow) is positioned
upward vertically.
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1B3-144 OM600 ENGINE MECHANICAL
10. Check the TDC marking of OT on the crankshaft.8. Install the chain tensioner.
Tightening Torque 80 Nm
Notice Replace the seal.Before installation, by pumping in the oil approx. 10 times, fill the oil.
9. Remove the engine lock.
Notice If max. length ‘L’ of the 12-sided bolt exceeds 53.6mm,
replace it.
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1B3-150 OM600 ENGINE MECHANICALIn this position, the marking on camshaft / camshaft bearing cap (arrow) must also be aligned. If the markings are notaligned, the timing chain must be re-set and the injectionpump timing has to be set.
14. Position the no.1 cylinder at TDC.
11. Place the fitting tool (8) onto the chain link and rivet thechain pins one by one.
12. Check the riveting of chain pins and re-rivet if necessary.
13. Remove the wire.
Tightening Torque 35 - 40 Nm
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1B3-158 OM600 ENGINE MECHANICAL
CRANKSHAFT SPROCKET
Preceding Work : Removal of oil panRemoval of timing case cover
1 12-Sided Stretch Bolt (M11) .. Check, 25Nm + 90 °
2 Washer
3 Camshaft Sprocket
4 Timing Chain
5 Bearing Pin
6 Bearing Pin
7 Oil Pump
8 Oil Pump Sprocket
9 Oil Pump Chain
10 Washer 11 Bolt
............................................................ 25Nm
12 Crankshaft Sprocket
13 Crankshaft
15 Key
16 Guide Rail
17 Spring
18 Bushing
19 Tensioning Lever
Page 425 of 1574
OM600 ENGINE MECHANICAL 1B3-161
Installation Procedure
1. Put the same alignment mark on the new crankshaftsprocket as in the old sprocket. Notice Check the timing chain, camshaft sprocket, injection pump timing sprocket, oil pump chain and oil pump sprocket for
wear and replace if necessary.
2. Install the new crankshaft sprocket (12) by using a drift (21). Notice Align the groove of sprocket and woodruff key (arrow)
exactly. Drift 116 589 07 15 00
3. Fit the timing chain (4) on the crankshaft sprocket (12). Notice Align the alignment marks (arrow) on the chain and sprocket.
4. Install the camshaft sprocket (3).
Tightening Torque 25 Nm + 90 °
Notice Pay attention on the alignment marks and dowel pin (arrow).