Pump and Fluid Systems
Chapter 5: Assembly/Disassembly
weatherford.com
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MP-16 2-Piece 5000 psi January 2013
5.3
Power End Assembly Procedures
The following are the standard procedures for assembling the various components and
systems of the power end of the MP-16 pump. All personnel involved in the assembly of the
power end must possess a thorough understanding of all of the following procedures,
especially any and all safety regulations involved.
All nuts, bolts & studs referenced in this section should be tightened to the appropriate
torque in accordance with 4.8.1: Torque Chart (page 49) unless specifically noted otherwise.
All nut and bolt connections located inside the pump should use lock nuts, and security
washers should be used on all bolts in tapped holes inside the pump.
5.3.1
Installing the Pinion Shaft & Bearings
It is possible to install the pinion assembly with or without crankshaft and gear in place.
Use the following guidelines to install the pinion shaft.
1
Install the pinion bearing inner races on the
pinion shaft by heating to 300°F in an oil
bath, electric oven or induction bearing
heater. Wait for races to cool before
proceeding.
NOTE
Never apply direct flame
to the bearings.
WARNING
During this process, parts
can become extremely
hot. Allow a few minutes
after heating for the
races to stabilize, and
handle with care.
2
Install the pinion bearing outer races to the
bearing carriers using a slip fit.
WARNING
During this process, parts
can become extremely
hot. Allow a few minutes
after heating for the
races to stabilize, and
handle with care.