Hydraulic power unit weekly inspection checklist

Oil level — Oil level in the sight glass

• Within the marks (Conforming)
• Below the minimum (Non-conforming)
• Above the maximum (Non-conforming)

Oil temperature — Oil temperature in the reservoir

Oil condition — Oil clear, not milky, foaming or dark

Breather — Breather or desiccant filter not saturated (colour indicator)

Pressure filter — Clogging indicator not tripped

Return filter — Clogging indicator not tripped

Pressure gauge — System pressure within the set range

Pump — No abnormal noise (whine, cavitation, knocking)

Motor and coupling — No abnormal vibration or heat; coupling guard in place

Oil cooler — Cooler clean; fan running or cooling water flowing

Accumulator — Gas pre-charge checked per the schedule

• Checked, within the specified pre-charge (Conforming)
• Not due this week
• Checked, out of range (Non-conforming)

Hoses and fittings — Any leak on hoses, fittings, valves or the reservoir?

Hoses — No abrasion, cracks, bulges or kinks; outer cover intact

Hose supports — Clamps and supports in place; whip restraints fitted where required

Drip tray — Drip tray or bund clean and dry

Remarks — Observations for the next service