Ps-855b Maintenance Manual _verified_ -

| Frequency | Action | Manual Page | | :--- | :--- | :--- | | | Inspect hydraulic lines for chafing; clear intake vents. | p. 34 | | 40 hours (Weekly) | Check oil level; top up with ISO VG 46. Clean breather cap. | p. 37 | | 200 hours (Monthly) | Replace return line filter. Grease 4 main pivot fittings. | p. 63 | | 500 hours (Quarterly) | Verify calibration of pressure transducer (PS-855B spec: +/- 2%). | p. 88 | | 1,000 hours (Semi-annual) | Change hydraulic oil (7.5 liters). Inspect flexible coupling. | p. 141 | | 2,000 hours (Annual) | Replace all wear seals. Perform full electrical diagnostic (Section 7). | p. 176 |

Conducted during deeper maintenance cycles to identify specific failing cells within the two six-cell battery packs. Proper Battery Storage & Handling ps-855b maintenance manual

A: Yes. The PS-855B’s hydraulic fluid is hygroscopic. A saturated breather allows moisture ingress, turning oil into milky sludge. The manual lists the correct replacement (part #BR-855B). | Frequency | Action | Manual Page |