VT 275 DESIGN FEATURES HIGH PRESSURE OIL HIGH PRESSURE OIL Rear Gear Train • The VT 275 gear train is located at the rear of the engine. The crankshaft gear is a press fit on the crankshaft and drives the camshaft gear directly. The crankshaft flange with integral gear is pressed on the end of the crankshaft then clamped with six 12mm bolts. The camshaft gear must be timed to the crankshaft gear during assembly to maintain the correct relationship. PUMP GEAR PUMP GEAR CAMSHAFT GEAR • The rear flange gear drives the primary balance shaft gear at a one-to-one ratio.
The balance shaft runs through the hollow camshaft to the front of the crankcase and has the balance shaft counterweight bolted to the front of the shaft. The flange gear and balance shaft gear must be timed to maintain the correct relationship between the balance shaft counterweight and the crankshaft. BALANCER SHAFT GEAR CRANKSHAFT FLANGE AND GEAR The high-pressure oil pump is located in the Vee of the engine and is driven directly off the camshaft gear. The oil pump gear does not require timing. Note: The crankshaft gear that drives the camshaft is located behind the flange gear. Gear Timing The camshaft and balance shaft must be timed to the crankshaft for proper engine operation.
During reassembly a timing pin that aligns the camshaft gear and the balance shaft gear is placed through the gears and into a hole machined in the crankcase, then the crankshaft is installed while aligning the balance shaft and flange gear dots. If only the balance shaft is out of the engine, the shaft can be installed while aligning the balance shaft gear and flange gear dots. CAMSHAFT GEAR TIMING PIN HOLE BALANCER SHAFT GEAR DOTS CRANKSHAFT FLANGE & GEAR TIMING GEAR 20 International ® VT 275 V6 Engine