Bosch VP44 Info & Installation Fuel Injection Pumps for Cummins 5.9L VP44 Pump General Information The fuel injection pump (VP44) is an electronic rotary distributor pump. Distributing the high-pressure, metered fuel to each cylinder at the precise time. Metering the exact amount of fuel for each injection cycle. Remove the nut and washer (DO NOT DROP WASHER INTO TIMING COVER) and verify that the key is in the notch 100% lined up. Snug up all 4 15mm nuts on the mounting studs. Bracket-to-fuel pump brace cap screws 10 mm Tighten all cap screws on the support bracket. The pump performs four basic functions: Producing the high fuel pressure required for injection. Use barring tool to prevent engine from rotating when tightening gear. The pump performs four basic functions: 1.
If not, remove pump and inspect key for … m (125 ft. Torque Value: 24 nm [212 in-lb ] 22 mm Tighten the pump driveshaft retaining nut. It CANNOT get out of time with the cam gear as long as the front tin cover is on. torque. It is the same idea as retorquing the studs. Varying the timing relative to engine speed. Push the rear three fuel lines toward the engine block and remove the pump. Bracket-to-fuel pump cap screws 2. Torque Value: 170 n.m [125 ft-lb ] Install the crankcase breather. VP44 Pump General Information The fuel injection pump (VP44) is an electronic rotary distributor pump. Set the new lock washer and nut on the VP44 axle, and snug (35 ft #) 5. Tighten the fuel injection pump mounting nuts. Do NOT turn pump shaft during or after removal; see why in paragraph below. lbs.) Use barring tool to prevent engine from rotating when tightening gear. Producing the high fuel pressure required for injection 2. Injection pump nut torque 94-98 2nd Gen. 12V : Advertisement If this is your first visit, be sure to ... As static friction coefficient is higher than dynamic, so the extra torque is going to break the nut loose, not actually tightening it down. 3. Torque Value: 43 n.m [32 ft-lb ] Tighten the brackets in the following sequence: 1. 4. It is possible to press the gear onto the pump with the key not aligned and really screw things up. Remove Old Injection Pump You CAN turn the engine over with or without the pump installed, with the drive gear loose. I could see loosening the nut, and then bumping the torque wrench up 5lbs more each time. Metering the exact amount of fuel for each injection cycle 3.
See figure 34.
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