What is the torque spec for the Cummins fuel injection pump drive gear retaining nut?

Tighten the fuel pump drive gear retaining nut to 11-15 ft. lbs. (15-20 N.m).

What torque do the fuel injection pump mounting nuts get?

After rotating the pump to align the timing marks, tighten the mounting nuts to 18 ft. lbs. (24 N.m).

What is the lock bolt torque and procedure?

Loosen the lock bolt, install the special washer under the lock bolt, and tighten the bolt to 10 ft. lbs. (14 N.m).

Do I need to adjust pump timing when reinstalling the original injection pump?

No — if the timing marks on the fuel injection flange and gear housing were aligned at removal, fuel pump timing does not require adjustment. If they were not aligned, check timing per FUEL INJECTION PUMP TIMING under ADJUSTMENTS.

What caution applies when installing the fuel injection pump?

Use care to prevent the key from dropping from the pump shaft; do not allow the key to fall from the pump shaft during removal or installation.

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1989 Dodge 5.9L Cummins Fuel Injection Pump Installation & Torque Specs

Service manual page: fuel injection pump timing marks figure and installation steps

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Service procedure page with a fuel injection pump timing-marks figure and pump installation instructions for a Cummins diesel.

AI caption December 2003 · Photo 1370 of 3537

This document is page 2 of a service procedure for the 5.9L 6-cylinder Cummins B Series turbo diesel engine (VIN code 8) in a 1989 Dodge Pickup, printed December 15, 2003 from a 2001 MRIC/Snap-on Tools information system. It covers installation of the fuel injection pump, both the original pump and a new or rebuilt pump. It includes Fig. 13, a labeled diagram (courtesy of Chrysler Motors) showing the gear housing, timing marks, lock bolt, fuel injection pump flange, and special washer. Key steps include: ensuring gasket surfaces are clean, setting the engine at TDC using the timing pin, installing a new gasket and the key in the pump shaft, installing mounting nuts loosely so the pump can rotate in its slots, tightening the drive gear retaining nut to 11-15 ft. lbs. (15-20 N.m), aligning timing marks, tightening mounting nuts to 18 ft. lbs. (24 N.m), installing the special washer under the lock bolt and tightening it to 10 ft. lbs. (14 N.m), then bleeding the fuel lines. Repeated cautions warn against letting the key drop from the pump shaft during removal or installation. Cross-references are given to FUEL INJECTION PUMP TIMING under ADJUSTMENTS and to FUEL LINE BLEEDING.

This document covers 1989, which may differ from this 1992 Ford Bronco.

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Frequently asked questions

What is the torque spec for the Cummins fuel injection pump drive gear retaining nut?: Tighten the fuel pump drive gear retaining nut to 11-15 ft. lbs. (15-20 N.m).
What torque do the fuel injection pump mounting nuts get?: After rotating the pump to align the timing marks, tighten the mounting nuts to 18 ft. lbs. (24 N.m).
What is the lock bolt torque and procedure?: Loosen the lock bolt, install the special washer under the lock bolt, and tighten the bolt to 10 ft. lbs. (14 N.m).
Do I need to adjust pump timing when reinstalling the original injection pump?: No — if the timing marks on the fuel injection flange and gear housing were aligned at removal, fuel pump timing does not require adjustment. If they were not aligned, check timing per FUEL INJECTION PUMP TIMING under ADJUSTMENTS.
What caution applies when installing the fuel injection pump?: Use care to prevent the key from dropping from the pump shaft; do not allow the key to fall from the pump shaft during removal or installation.