MAINTENANCE PLATFORM, TYPE B-1
PART NO. 50-19080 NSN 1730-00-390-5618 EIC: NA
CONTROLS AND INDICATORS
Hand Pump, Fluid Strainer, and By-Pass Valve.
Table 1. Maintenance Platform Controls and Indicators.
Hand Pump Handle
When actuated by the handle, the hydraulic hand pump draws hydraulic
uid from the reservoir and forces the uid into the hydraulic cylinder
assembly causing the upper structure to rise.
The by-pass valve is a needle-type valve and is located under the
hydraulic hand pump. When the by-pass valve is in the closed position,
it locks the uid under pressure in the hydraulic cylinder assembly.
Opening the by-pass valve allows the uid from the cylinder assembly
to by-pass the hand pump and return to the reservoir, causing the upper
structure to lower.