M11 Series – Service Manual – 009-016   Hydraulic Pump Drive

Remove the two mounting capscrews and the hydraulic pump, if equipped, or the cover plate.

Remove the three pump drive mounting capscrews.

Install a slide hammer and the engine baring tool, Part Number 3824270, to the hydraulic drive adapter. Use two M10-1.50 x 30 capscrews, Part Number 3335003, for SAE A drives, or two M12-1.75 x 40 capscrews, Part Number 3018671, for SAE B drives.

CAUTION  Do not allow the hydraulic drive gear to slide out of the adapter or the gear housing during removal. Damage to the gear will result.

Remove the hydraulic drive adapter, o-ring, and hydraulic drive gear.

Use bearing puller kit, Part Number 3823774, to remove the needle bearing from the gear housing.

Remove the needle bearing from the hydraulic pump adapter.

Remove the gasket material from the hydraulic pump adapter and hydraulic pump, if equipped, or cover plate surface.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Clean the hydraulic pump adapter, cover plate, gear, and needle bearings with solvent. Dry with compressed air.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

Clean the needle bearing bore in the gear housing with solvent and dry with a clean cloth.

Inspect the components for damage.

Measure the inside diameter of the needle bearing bore in the gear housing.

Measure the inside diameter of the needle bearing bore in the hydraulic pump drive adapter.

Measure the hydraulic drive shaft outside diameter.

Use clean 15W-40 oil to lubricate the outside diameter of the needle bearings.

Use clean 15W-40 oil to lubricate the needle bearing bores in the gear housing and the hydraulic pump drive adapter.

Use bearing installation tool, Part Number 3823776, included in bearing puller kit, Part Number 3823774, 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.

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 must be centered between the front and rear surfaces.

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

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.

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

Using a rubber hammer, 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’s end clearance.

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

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

Install the two mounting capscrews and tighten.