u.
Alternately tighten liner setscrews (47) slowly until fluid stops leaking through "weep" holes located on upper
sides of fluid end. When set, tighten nut (48) while holding setscrew in position.
4-5.2 Mud Pump Power End. (Figure 4-8)
4-5.2.1 Disassembling Power End. The mud pump drive case and mud pump clutch must be removed before performing
the following steps.
a.
Remove plug (51) and drain the mud pump power end. Remove screws (52), cover with filler (53, 54) and
gasket (55).
b.
Disconnect the chain (56) at the cotter pin type connector link.
c.
Remove screws (57), plate (58) with fitting (59), shims (60) and bearing cup (61).
d.
Remove screws (62), plate (63) with fitting (64), gasket (65), and bearing cup (66).
e.
Attach a hoisting device to the eccentric sprocket (74) so that it will be supported when the shaft is removed.
f.
Remove screws (14), lockwasher (15), plate (16) and gasket (18). Loosen locknut (19) and unscrew rod (20)
from crosshead (78).
NOTE
The shaft (67) MUST be removed from the side in which the shaft contains a tapped hole (3/4-
16). In the case both ends are tapped, the end for removal is designated by a 1/4-inch hole
next to the tapped hole.
g.
Remove shaft (67) using a puller bolt in the tapped hole of the shaft. As shaft is pulled, bearing cone (68),
bushing (69) and seal (70) can be removed from the opposite side.
h.
When shaft is fully removed, remove bearing cone (71), bushing (72) and seal (73). Key (82) can be held in
place on shaft (67) with masking tape.
i.
Lift sprocket (74), with connected parts (75-81), from the mud pump frame (40).
j.
Remove lockwires (75), screws (76) and retainers (91). Remove pins (77) to disconnect crossheads (78) from
connecting rods (81). Bushings (79 and 80) should remain installed in connecting rod (81) unless worn or
damaged.
k.
Remove screws (83), plate (84), and gasket (85). Leave fitting (86) in plate (84).
I.
Remove screws (87), retainer (88), and gasket (89). Remove seal (90) from retainer (88).
m.
Install screws in puller holes of housing (92) and pull housing (92) from the mud pump frame. Remove gasket
(93), bearing (94) and seal (95).
4-44
