JACK, HYDRAULIC, TRIPOD, TYPE B-5
PART NO. 50K25177 NSN 1730-00-516-2018 EIC: NA
OPERATING UNDER USUAL CONDITIONS
SECURITY MEASURES FOR ELECTRONIC DATA
ASSEMBLY AND PREPARATION FOR USE
The jack may be assembled in any of three basic closed heights by the use of the leg extensions. WP 0002 00,
Figure 1 shows the jack with all extensions installed. The broken lines indicate the three possible foot assembly
Minimum Closed Height
For this height the cylinder and ram assembly (WP 0002 00, Figure 1, Item 5) is mounted on the three legs
directly on the bottom of the legs. Six No. 1 braces (WP 0002 00, Figure 1, Item 7) are used.
Intermediate Closed Height
Refer to the Minimum Closed Height procedure above, with the addition of one leg extensions. Six each of the
Maximum Closed Height
For this height both sets of three leg extensions (WP 0002 00, Figure 1, Item 9) are used. The No. 2 braces
(WP 0002 00, Figure 1, Item 8) are swung down from their previous position and attached to the leg extensions
The ground surface under the jack should be level. If the ground is soft, a board or plank should be placed under
each foot assembly. The jack should be placed so a line drawn through the center of two of the feet will be parallel
to the fuselage of the airplane or load to be lifted.
Do not extend the extension screw more than 12 inches.
Turn the extension screw (WP 0002 00, Figure 1, Item 2) out until the socket in the screw contacts the load
to be lifted.
Position the Rise Indicator (WP 0002 00, Figure 1, Item 1) on zero of the rise indicator decalcomania.
Loosen the retaining screw on the ram locknut (WP 0002 00, Figure 1, Item 4) to allow the locknut to lower by
its own weight as the ram is extended.
Loosen the air vent assembly (WP 0004 00, Figure 1, Item 1) and tighten the release valve (WP 0004 00,
Figure 1, Item 6).