Ford — Test or Replace Hydraulic Oil
Maintenance · Hydraulic system
From a Ford service manual covering: 2WD, 4WD, Genie S-40. Check it applies to your exact model before use.
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Before you start
- Engine must not be started with hydraulic tank shutoff valves closed.
Procedure
- Close two hydraulic shutoff valves at tank.
- Remove drain plug and drain tank.
- Disconnect and cap two suction hoses.
- Remove strainer assemblies, clean.
- Apply pipe thread sealant, install strainers and drain plug.
- Install suction hoses.
- Fill tank with Dexron II equivalent hydraulic oil.
- Prime pump by cranking engine.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Tank capacity 45 gallons (170 liters)
- System capacity 50 gallons (189 liters)
Source: Ford 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.