McGRAW-EDISON ONAN Komatsu 0649 VALVE LASH CLEARANCE ADJUSTMENT
Diesel
Generator
Engine
Valve Lash Clearance Specifications: Warm and cold mm (in) INTAKE VALVES
0.35MM ( 0.014 Inch )
EXHAUST VALVES
0.50MM ( 0.020 Inch )
1)
2)
*
Rotate the crankshaft in the normal direction to align pointer (2) on the gear case cover with the 1.6 TOP mark on crankshaft pulley (1). When the begin to open, No.1 cylinder is in compression T.D.C. When No.1 cylinder is at compression T.D.C., adjust the valve marked • · Then rotate the crankshaft 360 ° in the normal direction, and adjust the valves marked o.
Rocker arm adjustment screw
Rocker arm shaft
Valve clearance
Valve arrangement chart Cylinder No. Intake valve Exhaust valve
�Locknut
3)
* *
2
1
3
• • •
0
0
5
4
•
•
0
0
6
•
0 0
4.5 ± 0.5 kgm 33 ± 4 f t · lb 44 ± 5 Nm
After adjusting No. 1 cylinder at compression top dead center, it is also possible to turn the crankshaft 120 ° each time and adjust the yalve clearance of each cylinder according to the firing order. Firing order: 1 - 5 - 3 - 6 - 2 - 4 After tightening the locknut, check the clearance again.
McGRAW-EDISON ONAN Komatsu 0649 Diesel Generator Engine Parts Contact Phone: 269 673 1638 Email: engineparts2@gmail.com www.Diesel-Generator-Engine-Parts.com
•
Cylinder Head PART NO.
QTY USED
186-0686
1
186-0687
1
2 186-0688 3 186-0689 186-0690 186-0691 4 186-0697 5 186-0692 6 186-0693
12
REF NO. 1
6 6 6 1 6 7
PART DESCRIPTION
REF NO.
Head Assembly, Cylinder With Valves (Includes Parts Marked*) Less Valves (Includes Parts Marked+) +*Guide, Valve Seat, Valve - Exhaust +* Standard 0.25mm Oversize 0.50mm Oversize +*Pipe, Breather +*Plug, Expansion +*Plug, Expansion
PART NO
7 186-0694 186-0695 9 186-0696 10 186-0698 11 186-0699 12 186-0700 13 186-0701 14 186-0702 15 186-0703 19 186-0705 20 186-0706 21 186-0949 8
QTY USED
PART DESCRIPTION
5 +*Plug, Expansion 16 +*Plug, Expansion 1 +*Plug, Expansion 1 *Valve, Intake 1 *Valve, Exhaust *Seat, Spr rng 12 24 *Collet, Lock - Valve *Valve, Spring 12 6 *Seal, Stem - Valve 1 Gasket Cylinder Head Bolt 25 Gasket Kit, Head - Cylinder 1
* Parts included in 186-0686 Cylinder Head Assembly. + Parts included in 186-0687 Cylinder Head Assembly. 6209-S1-1622 Cylinder Head Bolt Set includes (25) New 186-0706 Cylinder Head Bolts
• McGRAW-EDISON ONAN Komatsu Engine Parts Contact: Email: EngineParts@HeavyEquipmentRestorationParts.com Phone: 269 673 1638 Website: www.Diesel-Generator-Engine-Parts.com
• 15