Cummins/Onan — Hydraulic Motor Service and Installation

Repair & overhaul

From a Cummins/Onan service manual — check it applies to your exact model before use.

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Procedure

1. Remove the housing cover (top and side).
2. Disconnect the four hydraulic connections.
3. Unbolt the old motor (2 bolts) and withdraw it.
4. Lubricate the shaft spline of the new motor with Cummins spline lubricant (524–0781) and bolt it on.
5. Torque the bolts (2) to 41 lb-ft (56 N-m).

Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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