Reservoir seal.

TM 10-3990-200-12&P

top of piston and pull straight out of base. Discard

(3) Add tube gaskets 8 (2 places) and rod

piston arm assembly.

washer 15, position parts back in place and tighten

( 3 ) Install new piston arm assembly 21 using

lightly.

extreme caution to assure cup on end of piston does

( 4 ) Position top cover 13 radially so that the

not fold back over when it enters its chamber and is

filler hole is positioned directly above pressure relief

p r e s s e d downwards.

v a l v e 10. Tighten acorn nut 14 securely.

( 4 ) Replace packing nut 20 securely. Re-insert

d. Ball Checks.

pins 16 and 19 and position two pin rings 17

(1) Remove port adapter 1 with socket wrench

properly in their grooves for re-installation of handle

t o prevent crushing walls. Remove two balls, two

socket 18.

springs and' `O" rings and discard them.

b. Release Valve.

(2) Check ball seats and remove any foreign

(1) Loosen packing nut 25 and unscrew com-

p a r t i c l e s before balls are replaced. Seat each new

plete assembly from body. Unscrew packing nut

ball into its respective seat by tapping lightly with a

from stem and remove packing.

brass punch.

(2) Replace with new packing and reverse

(3) Install new balls and springs as shown. Add

procedure to reassemble.

n e w "O" ring 2 and re-install port adapter 1 and

NOTE

tighten with socket wrench.

Relationship of lever to stem must be

W h e n repairs are completed, fill pump reservoir to

maintained as received.

w i t h i n inch of top, install vented pipe plug into

c. Reservoir seal.

filler hole, close release valve 23 and pump handle

(1) Loosen acorn nut 14 and remove reservoir

rapidly until a tablespoon of oil is pumped out of the

tube 11 and separate seals 8 and 15. Discard seals 8

p o r t to assure no air is trapped between two ball

and 15.

checks and pump is operable. REINSTALL ONTO

(2) Remove any foreign particles from inside of

RAMP.

tube and body of pump.

2-3