TM 55-1520-240-23-6
7-268.1
ASSEMBLE 145HS775 RAMP CONTROL VALVE (AVIM)
(Continued)
7-268.1
16.
Lubricate guide washers (29 and 30) and thrust
plate (31) with hydraulic fluid (E199).
17.
Install thrust plate (31) inside valve body (4).
Temporarily lay valve on its side or top to keep
thrust plate in place.
NOTE
A dowel pin is pressed into each
retaining washer. Replace pins only
if loose or damaged. If new pin will
not fit tight in washer, replace both
washer and pin.
Holes in valve body that receive dowel
pins, are drilled for a clearance fit.
18.
Install guide washers (29 and 30) in valve body
(4). Make sure dowel pins (32 and 33) seat
properly in holes (34 and 35).
19.
Lubricate eight roller bearings (36), bearing cage
(37), input piston and slide assemblies (14 and
26), with hydraulic fluid (E199).
20.
Install eight roller bearings (36) in cage (37), on
slide assembly (26).
21.
Lubricate and install backup rings (38 and 39)
packings (40, 41, and 42), T ring (43), and gland
seal (44) on and in gland nut (45).
22.
Lubricate and carefully install piston (cap) seal
(46) over packing (42) inside gland nut (45).
23.
Lubricate sizing tool (T177) with hydraulic fluid
(E199) and slide sizing tool (T177) into gland nut
(45) to seat piston (cap) seal over packing.
24.
Upright valve body (4), and carefully install slide
and input piston assemblies (14 and 26) with
bearing cage (37) and bearings (36).
25.
Lubricate input piston (14), piston (cap) seal (46),
T ring (43), gland seal (44), and surfaces inside
valve body (4) with hydraulic fluid (E199).
26.
Install gland nut (45) and torque 195 to 215
inch-pounds.
27.
Move input piston (14) back and forth to make
sure parts operate without binding. If piston
binds, disassemble and repair as necessary.
28.
Lockwire gland nut (45) to valve body (4). Use
lockwire (E229).
7-989
