Instruction Manual for F1300/1600 Mud Pump
14
1.6.2. Liners
Installs wear-resisting plate seal (1) in counter bore of fluid end (see Fig. 8). Install wear-resisting
plate (2) through studs until it seats against fluid end. Mount liner flange (3) over studs with the
starting thread at the 5 o’clock position and tighten bolts with 640~690N.m (470~510ft.lbs) torque.
Note: Placing the starting thread at 5 o’clock position to make the liner gland threads
meshing much easier.
Place liner seal (4) in counter bore of wear-resisting plate (2). Apply thin coat of grease to ID of liner
lock (5) and slide over rear of liner (6). Install two-piece liner lock ring (7) in liner groove and O-ring
to hold them in position. Slide liner-handling tool over liner up against liner lock ring and tighten
setscrew to secure it in place. Hoist liner assembly into position with jib hoist. Apply liberal coat of
grease to liner lock threads. Align the starting thread of the liner lock (5) to the 7 o’clock position and
insert the liner into the liner thread ring (3) screw liner lock in until liner seats in position. Tighten with
sledgehammer on hammer lugs.
1.6.3. Piston Rod
Clean piston (9) and piston rod (8), making sure they are free of nicks and burrs. Install piston seal
ring (10) in groove of piston head. Slide piston head (9) on rod while observing that O-ring does not
fall out of groove. Tighten piston rod nut (11) with 1625~2165 N.m (1200~1600ft.lbs.)
Coat grease on liner I.D. and piston O.D. Check ends of piston rod and extension rod to be sure they
are clean and free of burrs. Insert piston rod into liner through cylinder head opening holding piston
rod centered at the rear of the liner. Drive the piston into the liner with a driving tool or a piece of
hardwood and sledgehammer. Use caution as the piston rod approaches the crosshead extension rod
that the dowel on the end of the piston rod is not damaged. The piston rod must be supported and
the dowel guided into the pilot bore.
1.6.4. Piston Rod Clamps
The piston rod clamps are machined as one piece and then sawed in half. The two pieces are with
matching numbers on each half and connected by chain. The two pieces with the same matching
numbers should always be kept together as a set. Install the clamp around the rod end flanges.
Tighten bolt with the following torque values: 330N.m (245ft.ls). before the clamps are installed,
mud guard packing (19) should be installed on the end of crosshead rod.
When piston rods and rod clamp are new, a gap in excess of 5.5mm could be present between the
two halves of the clamp, this is satisfactory provided the faces of the rods are seating metal to metal.
As wear occurs, the halves will pull closer together. Clamping action will be lost when a gap no longer
exists. At this time clamps must be replaced. Install splash plate on rear of liner.
1.6.5. Lower valve Guide and Cylinder Head
Insert the lower valve guide (13), hook it around the stem, insert plug (14) into the locating groove of
valve guide. Mount locating plate (12) in pump head bore, meanwhile install cylinder seal ring (15) on
cylinder plug (16)Start the lock plate (14) and draw it down, compressing the valve spring and seating
Coat seal ring and O.D. of plug with light lubricant. Push cylinder plug into the opening of fluid end.
Grease the cylinder head threads; screw the cylinder head (17) in against the plug (16). Tighten
cylinder head with wrench provided and sledge hammer.
Fluid leakage through the discharge hole indicates a defective seal or loose cylinder head. Should
replace seal or tighten cylinder head in time. DO NOT plug the discharge hole since this can result in
severe damage to cylinder head threads.
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