Ford — System Flushing Procedure
Maintenance · Hydraulic system
From a Ford service manual covering: MP 110, MP 95, MPH 80. Check it applies to your exact model before use.
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Before you start
- Monitor the hydraulic reservoir fluid level when cycling the unit functions, adding fluid as necessary.
Procedure
- With boom down and fully retracted, drain hydraulic fluid from reservoir into a clean, empty container.
- Remove suction hoses and return line hose; remove all hoses between pump and high pressure filter.
- Flush the hoses; remove hydraulic fluid filter and flush the filter body and attaching hoses; discard old filter element and replace.
- Flush out the reservoir; reinstall all removed hoses except the system return line to tank.
- Lengthen the system return line hose to drain into the reservoir fluid container.
- Pump good fluid back through the filter cart or fill reservoir with filtered, fresh hydraulic fluid.
- Loosen hose fittings at pump to allow pump to flood with hydraulic fluid, then tighten.
- Select GROUND CONTROLS; press and hold CHOKE/GLOW PLUG, then push ENGINE START.
- Select HIGH engine RPM and press and hold the Pump button (Deadman) to engage the pump.
- Briefly cycle all boom functions to flush the hydraulic components; monitor reservoir level and add fluid as necessary.
- Three cycles of all hydraulic cylinder functions should remove the old fluid.
- Reconnect system return hose to tank and fill hydraulic reservoir to full mark on sight gauge.
- Operate all functions to their full extreme positions; check for leaks and correct as necessary.
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.