TM 5-3805-255-14
0121
ASSEMBLY
000121
1. Assemble main relief valve as follows:
a. Assemble sleeve (Figure 17, Item 14) in valve body bore (Figure 17, Item 1) being sure hollow end of
sleeve is toward relief valve end of bore.
a. Install new O-ring (Figure 17, Item 4) and backup ring (Figure 17, Item 5) on poppet (Figure 17, Item 15).
b. After lubricating with clean oil (WP 0018), install poppet (Figure 17, Item 15) in valve body bore opposite
relief valve. Seat poppet against sleeve (Figure 17, Item 14).
c.
Install piston (Figure 17, Item 2) in poppet (Figure 17, Item 15).
d. Install spring (Figure 17, Item 3) over piston (Figure 17, Item 2) in recess of poppet (Figure 17, Item 15).
e. Install new O-ring (Figure 17, Item 6) and new backup ring (Figure 17, Item 5) in groove in small diameter
of plug (Figure 17, Item 7).
f.
Install new O-ring (Figure 17, Item 4) in groove in large diameter of plug (Figure 17, Item 7).
g. Install plug (Figure 17, Item 7) in valve body (Figure 17, Item 1). After lubricating with clean oil (WP 0014),
be sure spring (Figure 17, Item 3) fits in recess of plug. Tighten plug securely.
h. Install pilot poppet (Figure 17, Item 8) in center bore of plug (Figure 17, Item 7).
i.
Install spring (Figure 17, Item 9) on pilot poppet stem (Figure 17, Item 8).
j.
Thread adjusting screw (Figure 17, Item 10) into plug bore (Figure 17, Item 7) until it begins to compress
spring (Figure 17, Item 9).
k.
Place new copper washer (Figure 17, Item 11) over adjusting screw (Figure 17, Item 10) and install jamnut
(Figure 17, Item 12). Do not tighten jamnut. Valve is now ready for adjustment (WP 0078).
l.
After adjustment, install new copper washer (Figure 17, Item 11) and acorn nut (Figure 17, Item 13).
0121-14
