Cummins ISX11.9 CM2250 – Service Manual 009-016   Hydraulic Pump Drive

NOTE: This section is for engine mounted hydraulic drive adapters.

If the needle bearings were removed, use clean 15W-40 oil to lubricate the outside diameter of the needle bearings and the needle bearing bores in the gear housing and the hydraulic pump drive adapter.

If the needle bearing was removed, use bearing installation tool, Part Number 4919762, included in the bearing puller kit, Part Number 4919740, to install the needle bearings in the gear housing.

Tap the bearing gently until it comes in contact with the shoulder in the housing.

The bearing must be 0.25 to 0.76 mm [0.010 to 0.030 in] past the outside edge of the gear housing bore surface.

If the needle bearing was removed, use bearing installation tool, Part Number 4919762, included in the bearing puller kit, Part Number 4919740, to install the needle bearing in the hydraulic pump drive adapter.

Install the needle bearing in the hydraulic pump drive adapter from the inside end (the end that will be closest to the hydraulic drive gear).

The bearing is to be pressed in until it is flush or within 0.5 mm [0.02 in] of the stop surface.

Use Lubriplate™ 105, or equivalent, to lubricate the needle bearing in the gear housing and the outside of the hydraulic driveshaft.

Install a thrust bearing on the hydraulic drive shaft on either side of the gear.

NOTE: The thrust bearings are non-directional

Install the shaft and gear assembly so the internal splines of the shaft are facing away from the gear housing and toward the rear of the engine.

Install a new o-ring on the hydraulic drive adapter. Lubricate the o-ring with clean 15W-40 oil.

Lubricate the hydraulic drive adapter needle bearing and bore with Lubriplate™ 105 or equivalent.

Install the hydraulic drive adapter over the shaft and gear assembly.

NOTE: The bearing should be installed toward the gear.

Start the three mounting capscrews by hand to align the hydraulic drive adapter with the gear housing.

Use a rubber hammer to tap around the outside diameter of the adapter to install the adapter.

NOTE: Use care not to damage the o-ring during installation.

Tighten the mounting capscrews.

Measure the driveshaft end clearance.

Use dial indicator assembly, Part Number 3376050, with extension, Part Number ST-537-4, and a magnetic base, Part Number 3377399.

Hydraulic Pump Driveshaft End Clearance

Use a new gasket and install the hydraulic pump cover plate, if equipped.

Install the two mounting capscrews and tighten.

If equipped with a hydraulic pump, install the gasket, hydraulic pump, and mounting bracket(s). Refer to the OEM service manual for torque specifications and installation instructions.

NOTE: This section applies to air compressor mounted hydraulic drive adapters.

Use a new gasket and install the hydraulic pump.  Refer to the OEM service manual for installation instructions and torque specifications.