NOTE
The fluid cylinder (39) should not be separated from the mud pump frame (40) unless leakage
has occurred. If leakage has been occurring, perform steps I thru o.
I.
Remove nuts (38) and separate the fluid cylinder (39) from the mud pump frame (40).
m.
Remove nuts (41), packing glands (42), packing (43), junk rings (44), stuffing boxes (45) and gaskets (46).
n.
Install new junk rings (44), packing (43) in stuffing box (45). Assemble packing glands (42) to stuffing box and
install nuts (41).
o.
Install new gaskets (46) on stuffing boxes (45) and install them on fluid cylinder (39). Assemble fluid cylinder to
frame (40) and install nuts (38). Tighten nuts to 260 ft. lbs.
p.
Install the piston assembly (22) on the rod (20) and tighten nut (23). Install the assembled rod and piston into the
fluid cylinder, through the baffle (21) and into mud pump frame. Install clamp (28).
q.
Install the locknut (19) and then screw rod (20) into crosshead. Tighten locknut.
NOTE
When screw rod into crosshead, always leave two to three threads exposed on the rod behind
the locknut when it is locked down.
CAUTION
When installing head (12) after new liners have been installed, always loosen the liner
adjusting setscrews (47) before bolting the head down.
r.
Loosen nuts (48) on liner setscrews (47) and back setscrews out of head (12). Install new packing (49) behind
washer (50) and thread setscrew back into head until it is flush with inside surface.
s.
Install gaskets (13) and head (12). Install nuts (11) and tighten alternately. Torque nuts to 260 ft.-lbs.
t.
Install gasket (18), plate (16) and secure with capscrews (14) and lockwashers (15).
CAUTION
Never adjust liner setscrews (47) while pump is running. Do not overtighten setscrews since
too much pressure on liner can cause "bottle-necking" of liner sufficient to prevent piston
from passing.
4-43
