The TASKI Swingo 855B walk-behind auto-scrubber requires daily cleaning of the recovery tank, squeegee blades, and suction filter to maintain functionality. Regular maintenance includes checking battery electrolyte levels and inspecting mechanical parts for wear, with essential component replacements listed in the technical documentation. Detailed technical parts and service information can be found at Scribd. TASKI Swingo 755B & 855B Parts List | PDF - Scribd
The PS-855B is a self-contained emergency power supply designed primarily for aircraft to provide critical standby power to attitude gyros and essential flight instruments in the event of a total electrical failure. Manufactured by L-3 Communications (now L3Harris) and supported by Extant Aerospace, this unit relies on sealed lead-acid batteries and requires strict adherence to its Component Maintenance Manual (CMM TP-483) to ensure flight safety. Core Maintenance Requirements
Maintenance for the PS-855B is governed by L3 Service Letter SL-170, which outlines the mandatory periodic checks and testing intervals.
Periodic Checks (Every 3 to 6 Months): A condition check must be performed every quarter or half-year to verify the unit's operational status. This is similar to a "Preflight Check" and ensures the unit is ready for emergency deployment.
Annual Capacity Testing: Once a year, a full battery capacity test is required to determine the remaining life of the cells. Essential Maintenance Procedures ps-855b maintenance manual
According to the PS-855B documentation on Scribd, technical personnel should follow these specific steps: Capacity Check (The 5-Second Test):
With no external power applied, press and hold the PUSH TO TEST button for 5 seconds.
If the Test LED stays illuminated for the full 5 seconds, capacity is above 50%.
If the LED fails to illuminate or stays on for less than 5 seconds, the capacity is below 50% and requires a full recharge cycle. Recharging Guidelines: Above 50% Capacity: Charge for 8 hours. Below 50% Capacity: Charge for 16 hours. Apply thread sealant (PTFE tape or pipe dope)
The unit can reach 50% capacity within one hour at 25°C under normal flight conditions. Storage and Environmental Care:
Batteries must never be left in a discharged state, as this causes permanent damage.
Ideal storage is below 29°C (85°F) to minimize self-discharge. Technical Specifications for Maintenance Specification Input Power 28 VDC, 15 Amps max Output Voltage 24-28 VDC (Main) and 5 VDC (Converter) Battery Type Sealed Lead Acid (5.0 Amp/Hour for B model) Weight 13.7 lbs max Standard Manual TP-483 (Component Maintenance Manual) Procuring the Manual and Parts PS-850/PS-855 Component Manual | PDF - Scribd
REPORT: ANALYSIS AND OVERVIEW OF THE PS-855B MAINTENANCE MANUAL ps-855b maintenance manual
DATE: October 26, 2023 TO: Maintenance Department / Technical Management FROM: Technical Writing Division SUBJECT: Review and Summary of PS-855B Maintenance Procedures
The manual will list a pre-service checklist:
WARNING: RISK OF ELECTRIC SHOCK Ensure power is disconnected before servicing electrical components.
WARNING: PRESSURIZED SYSTEM Do not remove the switch from the pressurized line without isolating the system and relieving pressure. Sudden release of pressurized fluid can cause serious injury.
CAUTION: