
2 3
Engineering Data
MA-240L........................................................... 3
MA-240L-HD ..................................................... 4
MA-240M.......................................................... 5
MA-240M-HD .................................................... 6
MA-240K .......................................................... 7
SC-300L ........................................................... 8
SC-300 ............................................................. 9
RO-358L ......................................................... 10
RO-358........................................................... 11
Dimensional Data ...........................................12–13
Installation, Operation, Lubrication, Maintenance
and Storage Instructions....................................... 14
Safety ............................................................. 14
Storage............................................................ 14
Pump Location and Piping Design...................... 14
Suction Piping.............................................14–15
Acceleration Head ............................................ 15
Discharge Piping .............................................. 15
Bypass Piping .................................................. 15
Lubrication ...................................................... 16
V-Belt Drive ..................................................... 16
Direction of Rotation......................................... 16
Automatic (Safety) Shutdowns........................... 16
Suggested Piping System for Plunger Pumps ...... 17
Crankshaft Assembly............................................ 18
General ........................................................... 18
Tapered Roller Bearings .................................... 18
Cup Installation................................................ 18
Center Bearings................................................ 18
Installing Crankshaft ............................................ 18
Shim Adjustment of Tapered Roller Bearings....... 18
Installation of Crankshaft Oil Seal ...................... 18
Lube Oil Pump Assembly .................................. 19
Disassembly..................................................... 19
Connecting Rod, Crosshead, Extension Rod, Crosshead
Pin and Wiper Box Assembly/Disassembly .............. 19
General ........................................................... 19
Installing Wrist Pin Bushings............................. 20
Pinning the Crosshead ...................................... 20
Order of Assembly ............................................ 20
Precision Crankpin (Crankthrow) Bearings......20–21
Oil Scoop......................................................... 21
Wiper Box Assembly............................................. 21
General ........................................................... 21
“Poly Pak” Seal ............................................... 21
Mechanical Oil Seal.......................................... 21
Inserting the Extension Rod............................... 21
Stuffing Box, Packing and Plunger Assemblies ....... 21
General ........................................................... 21
Spring Loaded Packing ................................21–22
J-Style Stuffing Box & Plunger Assembly
(Styles 838 and 858) ....................................... 22
Inserting the Plunger ........................................ 22
Installing the Gland .......................................... 22
Installing the Stuffing Box................................. 22
Connecting the Plunger..................................... 23
Packing ........................................................... 23
Plungers.......................................................... 23
Disc Valve Systems and Abrasion Resistant
Valve Construction ............................................... 23
General ........................................................... 23
Disc Valve and Abrasion Resistant
Setting the Valve Seat....................................... 23
Installing O-Rings, Abrasion Resistant Spring
and Cage ......................................................... 23
Installing Disc, Spring, Disc Valves and Stem...... 24
Pulling the Valve Seat ....................................... 24
Salvage of Worn Seats....................................... 24
Trouble Location and Remedy ..........................25–27
Parts Lists......................................................28–34
Warranty ............................................................. 36