How big of a screwdriver do I need for a balance shaft?
If the screwdriver will only go in 20 – 25 mm (.79-.98 in.) before striking the counterbalance shaft, turn the sprocket once and check that the screwdriver goes in 60 mm (2.36 in.) or more. This will lock the balance shaft and prevent the oil pump sprocket and driven gear from spinning while loosening the nut/bolt.
What should the torque be on a balance shaft?
NOTE: The M10 bolt in the red circle should be tightened at a torque of 20-25 ft. lbs. Install the castle plug and torque to 14-20 ft. lbs. Don’t forget to install the O-ring on the front case groove, you risk cracking the front case if you torque the castle plug without it.
Is there such a thing as a balance shaft?
As you can see it inherits a potent lubrication problem and unlike the name suggests it’s job isn’t to balance but merely masks off the vibrations. Silent shaft is a more appropriate term but not used as commonly. Although the chances are slim, it’s still one less part that can fail.
How big does a counterbalance shaft need to be?
Check to be sure that the screwdriver goes in 60 mm (2.36 in.) or more. If the screwdriver will only go in 20 – 25 mm (.79-.98 in.) before striking the counterbalance shaft, turn the sprocket once and check that the screwdriver goes in 60 mm (2.36 in.) or more.
Do you need a balance shaft in a flat four engine?
In a flat-four engine, the forces are cancelled out by the pistons moving in opposite directions. Therefore balance shafts are not needed in flat-four engines. Balance shaft are also used in Straight-five engines such as GM Vortec 3700 .
How does a balance shaft work on a motorcycle?
The balance shafts do not reduce the vibrations experienced by the crankshaft. Numerous motorcycle engines— particularly straight-twin engines — have employed balance shaft systems, for example the Yamaha TRX850 and Yamaha TDM850 engines have a 270° crankshaft with a balance shaft.
If the screwdriver will only go in 20 – 25 mm (.79-.98 in.) before striking the counterbalance shaft, turn the sprocket once and check that the screwdriver goes in 60 mm (2.36 in.) or more. This will lock the balance shaft and prevent the oil pump sprocket and driven gear from spinning while loosening the nut/bolt.
Why is one balance shaft higher than the other?
This engine was the first to locate one balance shaft higher than the other, to counteract the second order rolling couple (i.e. about the crankshaft axis) due to the torque exerted by the inertia caused by increases and decreases in engine speed. In a flat-four engine, the forces are cancelled out by the pistons moving in opposite directions.