TM 10-4610-232-34
c. Remove valve seat (16), using valve seat puller.
NOTE
Items (11 thru 15, Figure 2-88, sheet 1) comprise the discharge valve assembly.
d. Remove four thumbscrews (17, sheet 2) and access cover (18).
e. Remove clamp assembly (19, sheet 1) by removing two capscrews from clamps.
f. Turn pump drive sheave (not shown) by hand until the plunger being worked on is as far forward as it will go. Then,
turn the pump sheave in the opposite direction until the plunger rod is as far to the rear as it will go.
g. Remove two nuts (20) and washers (21) and remove stuffing box (22) as an assembly. Remove preformed packing
(23).
h. Remove shield (25).
i. Push plunger (24) out of stuffing box (22). Items (26 thru 31) will come out on plunger (24).
j. Remove packing rings (26 thru 28).
k. Remove throat ring (31), spring (30) and ring (29).
l. Do not remove stud (32) or adjusting nut (33) unless they are damaged and must be replaced.
m. If necessary, remove plugs (34 and 35) and preformed packing (36 and 37).
n.
o.
P.
q.
r.
s.
If necessary, remove flange (38 and 39) and preformed packing (40 and 41).
NOTE
Items (40 thru 44, Figure 2-88, Sheet 1) comprise the suction valve assembly.
Remove capscrew (42), retainer (43), springs (44 and 45) and valve plate (46).
Remove valve seat (47) using valve seat puller.
Remove drain valves and fittings (48, 49 and 50) and stud (51).
Remove two capscrews (53, sheet 2).
Using two screwdrivers, pry seal holder (54) off drive housing (55).
t. Remove and discard gasket (56).
u. Drive seals (57 and 58) out of seal holder (54).
a. Wash all metal parts in solvent and blow dry with compressed air (25 psig [172 kPa] maximum).
b. Inspect all parts for signs of wear or damage. Check springs for cracks or deformation, valve seats for distortion or
wear, and all moving parts for damage. Check valve bores of housing (52, sheet 1) for wear or damage.
c. Replace packing (26 thru 28) and seals (57 and 58, sheet 2).
a. Refer to Figure 2-88, sheet 2 and install seal (58) in seal holder (54) with the seal lips facing upward. (Seal lips
must face housing (55) when seal holder (54) is installed).
b. Press seal (58) in until it is flush with the surface of seal holder (54).
c. Place seal (57) on top of seal (58) with the seal lips facing upward, Press on seal (57) until seal (58) bottoms in seal
holder (54).
2-251
