Quantcast Section II: OPERATION AND SERVICE INSTRUCTIONS

 

Click here to make tpub.com your Home Page

Page Title: Section II: OPERATION AND SERVICE INSTRUCTIONS
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
LEADING PARTICULARS.
Up
TM-55-1730-221-12 10 Ton Hydraulic Aircraft Hand Jack Type A-6 Part No. 53D22004 Manual
Next
LIFTING PROCEDURE
T.O.  35A2-2-39-11
T M 55-1730-221-12
OPERATION AND SERVICE INSTRUCTIONS
2-1. PRINCIPLE OF OPERATION. (See figure 2-1.)
c. Remove vent assembly (52) and inspect reservoir
f l u i d level to ascertain that fluid is within 1/4 inch of
The valve assembly, (14, figure 3-1) is located be-
reservoir filler hole boss.
neath the pump actuating cylinder (12). The valve
assembly contains a gravity check valve, a spring-
loaded check valve and a safety by-pass valve. On
d . If fluid level is low, add sufficient operating fluid
(refer to Leading Particulars, paragraph 1-4, for
the "up" stroke the pump piston (8) draws hydraulic
proper fluid specification) to fill reservoir to correct
fluid from the reservoir, and on the "down" stroke
fluid level.
forces fluid under pressure through the spring-loaded
check valve and into the base assembly (56) cylinder
NOTE
and rams (33, 39, 44). This fluid pressure is retained
by the spring-loaded check valve. Pressure may be
released, and the fluid returned to the resevoir, by
Reservoir shall be filled with fresh, clean
Fluid that has been filtered to remove
fluid.
opening the release valve (25). The safety by-pass
dirt, sand and all other solid matter may be
valve is operative when load to the rams exceeds the
used only in emergency cases.  Immediately
m a x i m u m allowable load of 11 tons (10% greater than
after emergency operation, flush jack with
1 0 ton rated load).
clean hydraulic fluid, and fill reservoir to
correct level.
2-2. OPERATING PREPARATION. The following pro-
cedure is used to prepare the jack for service:
e . Replace vent assembly (52), allowing vent screw to
remain open approximately two turns. Open release
a . Apply a light film of lubricating oil (Specification
v a l v e (25) one complete turn. Operate jack handle (1)
MIL-L-7870) to outer bearing surfaces of rams. Wipe
f o r ten to twenty pressure strokes to expel all trapped
a w a y excess oil with a clean, lint-free cloth to prevent
dust and grit accumulation on ram surfaces.
air.
f. Close release valve (25). Close screw of vent
b. Open release valve (25) approximately one-half
assembly (52) if jack is to be stored. Vent assembly
turn and manually collapse rams until flush with
screw shall remain open when jack is in service.
cylinder of base assembly (56).
Figure 2-1. Operational Schematic Diagram
2-1

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc.
6230 Stone Rd, Unit Q Port Richey, FL 34668

Phone For Parts Inquiries: (727) 493-0744
Google +